The patch titled
Add balance_dirty_pages_ratelimited() to cont_expand_zero()
has been removed from the -mm tree. Its filename was
add-balance_dirty_pages_ratelimited-to-cont_expand_zero.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: Add balance_dirty_pages_ratelimited() to cont_expand_zero()
From: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
On the systems, ftruncate() which expand size for FAT became the cause
of OOM. The cont_expand_zero() filled all memory with dirty pages,
and since disk is very slow, limit of page scanning was exceeded, then
it triggered OOM.
This adds balance_dirty_pages_ratelimited() to avoid filling memory
with dirty pages.
Signed-off-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/buffer.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN fs/buffer.c~add-balance_dirty_pages_ratelimited-to-cont_expand_zero fs/buffer.c
--- a/fs/buffer.c~add-balance_dirty_pages_ratelimited-to-cont_expand_zero
+++ a/fs/buffer.c
@@ -2246,6 +2246,8 @@ int cont_expand_zero(struct file *file,
goto out;
BUG_ON(err != len);
err = 0;
+
+ balance_dirty_pages_ratelimited(mapping);
}
/* page covers the boundary, find the boundary offset */
_
Patches currently in -mm which might be from hirofumi@xxxxxxxxxxxxxxxxxx are
origin.patch
vfs-fix-unconditional-write_super-call-in-file_fsync.patch
fat-use-get-put_unaligned_-helpers.patch
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