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[PATCH] reiserfs: reiserfs hang and performance fix for data=journal mode

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In data=journal mode, reiserfs writepage needs to make sure not to trigger
transactions while being run under PF_MEMALLOC.  This patch makes sure to
redirty the page instead of forcing a transaction start in this case.

Also, calling filemap_fdata* in order to trigger io on the block device can
cause lock inversions on the page lock.  Instead, do simple batching from
flush_commit_list.

Signed-off-by: Chris Mason <mason@suse.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Chris Mason
2006-02-01 03:06:49 -08:00
committed by Linus Torvalds
parent fc5cd582e9
commit e0e851cf30
2 changed files with 21 additions and 5 deletions
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7
fs/reiserfs/inode.c
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@@ -2363,6 +2363,13 @@ static int reiserfs_write_full_page(struct page *page,
int bh_per_page = PAGE_CACHE_SIZE / s->s_blocksize;
th.t_trans_id = 0;
/* no logging allowed when nonblocking or from PF_MEMALLOC */
if (checked && (current->flags & PF_MEMALLOC)) {
redirty_page_for_writepage(wbc, page);
unlock_page(page);
return 0;
}
/* The page dirty bit is cleared before writepage is called, which
* means we have to tell create_empty_buffers to make dirty buffers
* The page really should be up to date at this point, so tossing