maps4: regroup task_mmu by interface
Reorder source so that all the code and data for each interface is together. Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: David Rientjes <rientjes@google.com> Cc: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matt Mackall
Linus Torvalds
parent
f248dcb34d
commit
a6198797cc
@ -114,36 +114,122 @@ static void pad_len_spaces(struct seq_file *m, int len)
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seq_printf(m, "%*c", len, ' ');
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}
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/*
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* Proportional Set Size(PSS): my share of RSS.
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*
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* PSS of a process is the count of pages it has in memory, where each
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* page is divided by the number of processes sharing it. So if a
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* process has 1000 pages all to itself, and 1000 shared with one other
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* process, its PSS will be 1500.
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*
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* To keep (accumulated) division errors low, we adopt a 64bit
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* fixed-point pss counter to minimize division errors. So (pss >>
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* PSS_SHIFT) would be the real byte count.
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*
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* A shift of 12 before division means (assuming 4K page size):
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* - 1M 3-user-pages add up to 8KB errors;
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* - supports mapcount up to 2^24, or 16M;
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* - supports PSS up to 2^52 bytes, or 4PB.
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*/
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#define PSS_SHIFT 12
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struct mem_size_stats
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static void vma_stop(struct proc_maps_private *priv, struct vm_area_struct *vma)
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{
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struct vm_area_struct *vma;
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unsigned long resident;
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unsigned long shared_clean;
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unsigned long shared_dirty;
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unsigned long private_clean;
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unsigned long private_dirty;
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unsigned long referenced;
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u64 pss;
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};
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if (vma && vma != priv->tail_vma) {
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struct mm_struct *mm = vma->vm_mm;
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up_read(&mm->mmap_sem);
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mmput(mm);
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}
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}
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static void *m_start(struct seq_file *m, loff_t *pos)
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{
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struct proc_maps_private *priv = m->private;
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unsigned long last_addr = m->version;
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struct mm_struct *mm;
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struct vm_area_struct *vma, *tail_vma = NULL;
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loff_t l = *pos;
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/* Clear the per syscall fields in priv */
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priv->task = NULL;
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priv->tail_vma = NULL;
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/*
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* We remember last_addr rather than next_addr to hit with
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* mmap_cache most of the time. We have zero last_addr at
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* the beginning and also after lseek. We will have -1 last_addr
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* after the end of the vmas.
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*/
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if (last_addr == -1UL)
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return NULL;
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priv->task = get_pid_task(priv->pid, PIDTYPE_PID);
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if (!priv->task)
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return NULL;
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mm = mm_for_maps(priv->task);
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if (!mm)
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return NULL;
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tail_vma = get_gate_vma(priv->task);
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priv->tail_vma = tail_vma;
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/* Start with last addr hint */
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vma = find_vma(mm, last_addr);
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if (last_addr && vma) {
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vma = vma->vm_next;
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goto out;
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}
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/*
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* Check the vma index is within the range and do
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* sequential scan until m_index.
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*/
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vma = NULL;
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if ((unsigned long)l < mm->map_count) {
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vma = mm->mmap;
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while (l-- && vma)
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vma = vma->vm_next;
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goto out;
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}
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if (l != mm->map_count)
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tail_vma = NULL; /* After gate vma */
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out:
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if (vma)
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return vma;
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/* End of vmas has been reached */
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m->version = (tail_vma != NULL)? 0: -1UL;
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up_read(&mm->mmap_sem);
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mmput(mm);
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return tail_vma;
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}
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static void *m_next(struct seq_file *m, void *v, loff_t *pos)
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{
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struct proc_maps_private *priv = m->private;
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struct vm_area_struct *vma = v;
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struct vm_area_struct *tail_vma = priv->tail_vma;
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(*pos)++;
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if (vma && (vma != tail_vma) && vma->vm_next)
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return vma->vm_next;
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vma_stop(priv, vma);
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return (vma != tail_vma)? tail_vma: NULL;
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}
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static void m_stop(struct seq_file *m, void *v)
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{
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struct proc_maps_private *priv = m->private;
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struct vm_area_struct *vma = v;
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vma_stop(priv, vma);
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if (priv->task)
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put_task_struct(priv->task);
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}
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static int do_maps_open(struct inode *inode, struct file *file,
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struct seq_operations *ops)
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{
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struct proc_maps_private *priv;
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int ret = -ENOMEM;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (priv) {
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priv->pid = proc_pid(inode);
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ret = seq_open(file, ops);
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if (!ret) {
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struct seq_file *m = file->private_data;
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m->private = priv;
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} else {
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kfree(priv);
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}
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}
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return ret;
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}
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static int show_map(struct seq_file *m, void *v)
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{
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@ -210,6 +296,56 @@ static int show_map(struct seq_file *m, void *v)
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return 0;
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}
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static struct seq_operations proc_pid_maps_op = {
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.start = m_start,
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.next = m_next,
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.stop = m_stop,
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.show = show_map
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};
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static int maps_open(struct inode *inode, struct file *file)
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{
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return do_maps_open(inode, file, &proc_pid_maps_op);
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}
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const struct file_operations proc_maps_operations = {
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.open = maps_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_private,
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};
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/*
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* Proportional Set Size(PSS): my share of RSS.
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*
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* PSS of a process is the count of pages it has in memory, where each
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* page is divided by the number of processes sharing it. So if a
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* process has 1000 pages all to itself, and 1000 shared with one other
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* process, its PSS will be 1500.
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*
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* To keep (accumulated) division errors low, we adopt a 64bit
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* fixed-point pss counter to minimize division errors. So (pss >>
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* PSS_SHIFT) would be the real byte count.
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*
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* A shift of 12 before division means (assuming 4K page size):
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* - 1M 3-user-pages add up to 8KB errors;
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* - supports mapcount up to 2^24, or 16M;
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* - supports PSS up to 2^52 bytes, or 4PB.
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*/
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#define PSS_SHIFT 12
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struct mem_size_stats
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{
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struct vm_area_struct *vma;
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unsigned long resident;
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unsigned long shared_clean;
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unsigned long shared_dirty;
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unsigned long private_clean;
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unsigned long private_dirty;
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unsigned long referenced;
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u64 pss;
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};
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static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
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void *private)
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{
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@ -255,33 +391,6 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
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return 0;
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}
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static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
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unsigned long end, void *private)
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{
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struct vm_area_struct *vma = private;
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pte_t *pte, ptent;
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spinlock_t *ptl;
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struct page *page;
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pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
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for (; addr != end; pte++, addr += PAGE_SIZE) {
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ptent = *pte;
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if (!pte_present(ptent))
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continue;
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page = vm_normal_page(vma, addr, ptent);
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if (!page)
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continue;
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/* Clear accessed and referenced bits. */
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ptep_test_and_clear_young(vma, addr, pte);
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ClearPageReferenced(page);
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}
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pte_unmap_unlock(pte - 1, ptl);
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cond_resched();
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return 0;
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}
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static struct mm_walk smaps_walk = { .pmd_entry = smaps_pte_range };
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static int show_smap(struct seq_file *m, void *v)
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@ -321,6 +430,52 @@ static int show_smap(struct seq_file *m, void *v)
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return ret;
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}
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static struct seq_operations proc_pid_smaps_op = {
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.start = m_start,
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.next = m_next,
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.stop = m_stop,
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.show = show_smap
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};
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static int smaps_open(struct inode *inode, struct file *file)
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{
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return do_maps_open(inode, file, &proc_pid_smaps_op);
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}
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const struct file_operations proc_smaps_operations = {
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.open = smaps_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_private,
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};
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static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
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unsigned long end, void *private)
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{
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struct vm_area_struct *vma = private;
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pte_t *pte, ptent;
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spinlock_t *ptl;
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struct page *page;
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pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
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for (; addr != end; pte++, addr += PAGE_SIZE) {
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ptent = *pte;
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if (!pte_present(ptent))
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continue;
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page = vm_normal_page(vma, addr, ptent);
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if (!page)
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continue;
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/* Clear accessed and referenced bits. */
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ptep_test_and_clear_young(vma, addr, pte);
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ClearPageReferenced(page);
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}
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pte_unmap_unlock(pte - 1, ptl);
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cond_resched();
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return 0;
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}
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static struct mm_walk clear_refs_walk = { .pmd_entry = clear_refs_pte_range };
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static ssize_t clear_refs_write(struct file *file, const char __user *buf,
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@ -364,147 +519,6 @@ const struct file_operations proc_clear_refs_operations = {
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.write = clear_refs_write,
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};
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static void *m_start(struct seq_file *m, loff_t *pos)
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{
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struct proc_maps_private *priv = m->private;
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unsigned long last_addr = m->version;
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struct mm_struct *mm;
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struct vm_area_struct *vma, *tail_vma = NULL;
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loff_t l = *pos;
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/* Clear the per syscall fields in priv */
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priv->task = NULL;
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priv->tail_vma = NULL;
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/*
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* We remember last_addr rather than next_addr to hit with
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* mmap_cache most of the time. We have zero last_addr at
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* the beginning and also after lseek. We will have -1 last_addr
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* after the end of the vmas.
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*/
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if (last_addr == -1UL)
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return NULL;
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priv->task = get_pid_task(priv->pid, PIDTYPE_PID);
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if (!priv->task)
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return NULL;
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mm = mm_for_maps(priv->task);
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if (!mm)
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return NULL;
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priv->tail_vma = tail_vma = get_gate_vma(priv->task);
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/* Start with last addr hint */
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if (last_addr && (vma = find_vma(mm, last_addr))) {
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vma = vma->vm_next;
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goto out;
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}
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/*
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* Check the vma index is within the range and do
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* sequential scan until m_index.
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*/
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vma = NULL;
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if ((unsigned long)l < mm->map_count) {
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vma = mm->mmap;
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while (l-- && vma)
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vma = vma->vm_next;
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goto out;
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}
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if (l != mm->map_count)
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tail_vma = NULL; /* After gate vma */
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out:
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if (vma)
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return vma;
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/* End of vmas has been reached */
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m->version = (tail_vma != NULL)? 0: -1UL;
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up_read(&mm->mmap_sem);
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mmput(mm);
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return tail_vma;
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}
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static void vma_stop(struct proc_maps_private *priv, struct vm_area_struct *vma)
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{
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if (vma && vma != priv->tail_vma) {
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struct mm_struct *mm = vma->vm_mm;
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up_read(&mm->mmap_sem);
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mmput(mm);
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}
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}
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static void *m_next(struct seq_file *m, void *v, loff_t *pos)
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{
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struct proc_maps_private *priv = m->private;
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struct vm_area_struct *vma = v;
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struct vm_area_struct *tail_vma = priv->tail_vma;
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(*pos)++;
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if (vma && (vma != tail_vma) && vma->vm_next)
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return vma->vm_next;
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vma_stop(priv, vma);
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return (vma != tail_vma)? tail_vma: NULL;
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}
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static void m_stop(struct seq_file *m, void *v)
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{
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struct proc_maps_private *priv = m->private;
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struct vm_area_struct *vma = v;
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vma_stop(priv, vma);
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if (priv->task)
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put_task_struct(priv->task);
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}
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static struct seq_operations proc_pid_maps_op = {
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.start = m_start,
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.next = m_next,
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.stop = m_stop,
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.show = show_map
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};
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static struct seq_operations proc_pid_smaps_op = {
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.start = m_start,
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.next = m_next,
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.stop = m_stop,
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.show = show_smap
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};
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static int do_maps_open(struct inode *inode, struct file *file,
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struct seq_operations *ops)
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{
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struct proc_maps_private *priv;
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int ret = -ENOMEM;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (priv) {
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priv->pid = proc_pid(inode);
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ret = seq_open(file, ops);
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if (!ret) {
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struct seq_file *m = file->private_data;
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m->private = priv;
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} else {
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kfree(priv);
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}
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}
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return ret;
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}
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static int maps_open(struct inode *inode, struct file *file)
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{
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return do_maps_open(inode, file, &proc_pid_maps_op);
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}
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const struct file_operations proc_maps_operations = {
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.open = maps_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_private,
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};
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#ifdef CONFIG_NUMA
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extern int show_numa_map(struct seq_file *m, void *v);
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@ -539,14 +553,3 @@ const struct file_operations proc_numa_maps_operations = {
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};
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#endif
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static int smaps_open(struct inode *inode, struct file *file)
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{
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return do_maps_open(inode, file, &proc_pid_smaps_op);
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}
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const struct file_operations proc_smaps_operations = {
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.open = smaps_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_private,
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};
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