ext4: Don't do GFP_NOFS allocations after taking ext4_lock_group
We can't do GFP_NOFS allocation after taking ext4_lock_group BUG: sleeping function called from invalid context at mm/slab.c:3054 in_atomic():1, irqs_disabled():0 1 lock held by vi/2426: #0: (&ei->i_data_sem){----}, at: [<c01cf665>] ext4_release_file+0x23/0x66 Pid: 2426, comm: vi Not tainted 2.6.25-rc7 #24 [<c011a3dc>] __might_sleep+0xbe/0xc5 [<c01620c9>] kmem_cache_alloc+0x22/0xa6 [<c01e382a>] ext4_mb_release_inode_pa+0x73/0x1b3 [<c01e6adf>] ext4_mb_discard_inode_preallocations+0x22d/0x2d4 [<c013000a>] ? param_set_ushort+0x32/0x39 [<c01ceba1>] ext4_discard_reservation+0x27/0x6a [<c01cf66c>] ext4_release_file+0x2a/0x66 [<c0165bd6>] __fput+0xae/0x155 [<c0165e46>] fput+0x17/0x19 [<c0163756>] filp_close+0x50/0x5a [<c01647c0>] sys_close+0x71/0xad [<c0104aba>] sysenter_past_esp+0x5f/0xa5 Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
parent
3dcf54515a
commit
c83617db76
@ -3730,9 +3730,9 @@ static int ext4_mb_new_preallocation(struct ext4_allocation_context *ac)
|
||||
*/
|
||||
static noinline_for_stack int
|
||||
ext4_mb_release_inode_pa(struct ext4_buddy *e4b, struct buffer_head *bitmap_bh,
|
||||
struct ext4_prealloc_space *pa)
|
||||
struct ext4_prealloc_space *pa,
|
||||
struct ext4_allocation_context *ac)
|
||||
{
|
||||
struct ext4_allocation_context *ac;
|
||||
struct super_block *sb = e4b->bd_sb;
|
||||
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
||||
unsigned long end;
|
||||
@ -3748,8 +3748,6 @@ ext4_mb_release_inode_pa(struct ext4_buddy *e4b, struct buffer_head *bitmap_bh,
|
||||
BUG_ON(group != e4b->bd_group && pa->pa_len != 0);
|
||||
end = bit + pa->pa_len;
|
||||
|
||||
ac = kmem_cache_alloc(ext4_ac_cachep, GFP_NOFS);
|
||||
|
||||
if (ac) {
|
||||
ac->ac_sb = sb;
|
||||
ac->ac_inode = pa->pa_inode;
|
||||
@ -3794,23 +3792,19 @@ ext4_mb_release_inode_pa(struct ext4_buddy *e4b, struct buffer_head *bitmap_bh,
|
||||
*/
|
||||
}
|
||||
atomic_add(free, &sbi->s_mb_discarded);
|
||||
if (ac)
|
||||
kmem_cache_free(ext4_ac_cachep, ac);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static noinline_for_stack int
|
||||
ext4_mb_release_group_pa(struct ext4_buddy *e4b,
|
||||
struct ext4_prealloc_space *pa)
|
||||
struct ext4_prealloc_space *pa,
|
||||
struct ext4_allocation_context *ac)
|
||||
{
|
||||
struct ext4_allocation_context *ac;
|
||||
struct super_block *sb = e4b->bd_sb;
|
||||
ext4_group_t group;
|
||||
ext4_grpblk_t bit;
|
||||
|
||||
ac = kmem_cache_alloc(ext4_ac_cachep, GFP_NOFS);
|
||||
|
||||
if (ac)
|
||||
ac->ac_op = EXT4_MB_HISTORY_DISCARD;
|
||||
|
||||
@ -3828,7 +3822,6 @@ ext4_mb_release_group_pa(struct ext4_buddy *e4b,
|
||||
ac->ac_b_ex.fe_len = pa->pa_len;
|
||||
ac->ac_b_ex.fe_logical = 0;
|
||||
ext4_mb_store_history(ac);
|
||||
kmem_cache_free(ext4_ac_cachep, ac);
|
||||
}
|
||||
|
||||
return 0;
|
||||
@ -3850,6 +3843,7 @@ ext4_mb_discard_group_preallocations(struct super_block *sb,
|
||||
struct ext4_group_info *grp = ext4_get_group_info(sb, group);
|
||||
struct buffer_head *bitmap_bh = NULL;
|
||||
struct ext4_prealloc_space *pa, *tmp;
|
||||
struct ext4_allocation_context *ac;
|
||||
struct list_head list;
|
||||
struct ext4_buddy e4b;
|
||||
int err;
|
||||
@ -3877,6 +3871,7 @@ ext4_mb_discard_group_preallocations(struct super_block *sb,
|
||||
grp = ext4_get_group_info(sb, group);
|
||||
INIT_LIST_HEAD(&list);
|
||||
|
||||
ac = kmem_cache_alloc(ext4_ac_cachep, GFP_NOFS);
|
||||
repeat:
|
||||
ext4_lock_group(sb, group);
|
||||
list_for_each_entry_safe(pa, tmp,
|
||||
@ -3931,9 +3926,9 @@ ext4_mb_discard_group_preallocations(struct super_block *sb,
|
||||
spin_unlock(pa->pa_obj_lock);
|
||||
|
||||
if (pa->pa_linear)
|
||||
ext4_mb_release_group_pa(&e4b, pa);
|
||||
ext4_mb_release_group_pa(&e4b, pa, ac);
|
||||
else
|
||||
ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa);
|
||||
ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa, ac);
|
||||
|
||||
list_del(&pa->u.pa_tmp_list);
|
||||
call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback);
|
||||
@ -3941,6 +3936,8 @@ ext4_mb_discard_group_preallocations(struct super_block *sb,
|
||||
|
||||
out:
|
||||
ext4_unlock_group(sb, group);
|
||||
if (ac)
|
||||
kmem_cache_free(ext4_ac_cachep, ac);
|
||||
ext4_mb_release_desc(&e4b);
|
||||
put_bh(bitmap_bh);
|
||||
return free;
|
||||
@ -3961,6 +3958,7 @@ void ext4_mb_discard_inode_preallocations(struct inode *inode)
|
||||
struct super_block *sb = inode->i_sb;
|
||||
struct buffer_head *bitmap_bh = NULL;
|
||||
struct ext4_prealloc_space *pa, *tmp;
|
||||
struct ext4_allocation_context *ac;
|
||||
ext4_group_t group = 0;
|
||||
struct list_head list;
|
||||
struct ext4_buddy e4b;
|
||||
@ -3975,6 +3973,7 @@ void ext4_mb_discard_inode_preallocations(struct inode *inode)
|
||||
|
||||
INIT_LIST_HEAD(&list);
|
||||
|
||||
ac = kmem_cache_alloc(ext4_ac_cachep, GFP_NOFS);
|
||||
repeat:
|
||||
/* first, collect all pa's in the inode */
|
||||
spin_lock(&ei->i_prealloc_lock);
|
||||
@ -4039,7 +4038,7 @@ void ext4_mb_discard_inode_preallocations(struct inode *inode)
|
||||
|
||||
ext4_lock_group(sb, group);
|
||||
list_del(&pa->pa_group_list);
|
||||
ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa);
|
||||
ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa, ac);
|
||||
ext4_unlock_group(sb, group);
|
||||
|
||||
ext4_mb_release_desc(&e4b);
|
||||
@ -4048,6 +4047,8 @@ void ext4_mb_discard_inode_preallocations(struct inode *inode)
|
||||
list_del(&pa->u.pa_tmp_list);
|
||||
call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback);
|
||||
}
|
||||
if (ac)
|
||||
kmem_cache_free(ext4_ac_cachep, ac);
|
||||
}
|
||||
|
||||
/*
|
||||
|
Loading…
Reference in New Issue
Block a user