AcoSail/kernel_optimize_test
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ocfs2: take ip_alloc_sem during entire truncate

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Use of the alloc sem during truncate was too narrow - we want to protect
the i_size change and page truncation against mmap now.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh 2007-05-09 13:40:18 -07:00
parent baf4661a82
commit 2e89b2e48e
2 changed files with 9 additions and 6 deletions
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3
fs/ocfs2/alloc.c
View File

@ -3631,8 +3631,6 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb,
mlog_entry_void();
down_write(&OCFS2_I(inode)->ip_alloc_sem);
new_highest_cpos = ocfs2_clusters_for_bytes(osb->sb,
i_size_read(inode));
@ -3754,7 +3752,6 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb,
goto start;
bail:
up_write(&OCFS2_I(inode)->ip_alloc_sem);
ocfs2_schedule_truncate_log_flush(osb, 1);

12
fs/ocfs2/file.c
View File

@ -326,9 +326,6 @@ static int ocfs2_truncate_file(struct inode *inode,
(unsigned long long)OCFS2_I(inode)->ip_blkno,
(unsigned long long)new_i_size);
unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
truncate_inode_pages(inode->i_mapping, new_i_size);
fe = (struct ocfs2_dinode *) di_bh->b_data;
if (!OCFS2_IS_VALID_DINODE(fe)) {
OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
@ -363,16 +360,23 @@ static int ocfs2_truncate_file(struct inode *inode,
if (new_i_size == le64_to_cpu(fe->i_size))
goto bail;
down_write(&OCFS2_I(inode)->ip_alloc_sem);
/* This forces other nodes to sync and drop their pages. Do
* this even if we have a truncate without allocation change -
* ocfs2 cluster sizes can be much greater than page size, so
* we have to truncate them anyway. */
status = ocfs2_data_lock(inode, 1);
if (status < 0) {
up_write(&OCFS2_I(inode)->ip_alloc_sem);
mlog_errno(status);
goto bail;
}
unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
truncate_inode_pages(inode->i_mapping, new_i_size);
/* alright, we're going to need to do a full blown alloc size
* change. Orphan the inode so that recovery can complete the
* truncate if necessary. This does the task of marking
@ -399,6 +403,8 @@ static int ocfs2_truncate_file(struct inode *inode,
bail_unlock_data:
ocfs2_data_unlock(inode, 1);
up_write(&OCFS2_I(inode)->ip_alloc_sem);
bail:
mlog_exit(status);