AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

[PATCH] md: make sure bitmap updates are visible through filesystem

Browse Source 
When we update a page_cache page in the kernel, we need to flush_dache_page or
userspace might not see the change.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown 2006-01-06 00:20:45 -08:00 committed by Linus Torvalds
parent 07dbd37727
commit c708443c00
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/md/bitmap.c
View File

@ -315,6 +315,8 @@ static int write_page(struct bitmap *bitmap, struct page *page, int wait)
if (bitmap->file == NULL)
return write_sb_page(bitmap->mddev, bitmap->offset, page, wait);
flush_dcache_page(page); /* make sure visible to anyone reading the file */
if (wait)
lock_page(page);
else {