From b443e7339aa08574d30b0819b344618459c76214 Mon Sep 17 00:00:00 2001
From: Eric Sandeen <sandeen@redhat.com>
Date: Wed, 27 Oct 2010 21:30:03 -0400
Subject: [PATCH] ext4: don't bump up LONG_MAX nr_to_write by a factor of 8
I'm uneasy with lots of stuff going on in ext4_da_writepages(),
but bumping nr_to_write from LLONG_MAX to -8 clearly isn't
making anything better, so avoid the multiplier in that case.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
fs/ext4/inode.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index d88ba4a9effad..50f3bba68a254 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3004,9 +3004,12 @@ static int ext4_da_writepages(struct address_space *mapping,
* sbi->max_writeback_mb_bump whichever is smaller.
*/
max_pages = sbi->s_max_writeback_mb_bump << (20 - PAGE_CACHE_SHIFT);
- if (!range_cyclic && range_whole)
- desired_nr_to_write = wbc->nr_to_write * 8;
- else
+ if (!range_cyclic && range_whole) {
+ if (wbc->nr_to_write == LONG_MAX)
+ desired_nr_to_write = wbc->nr_to_write;
+ else
+ desired_nr_to_write = wbc->nr_to_write * 8;
+ } else
desired_nr_to_write = ext4_num_dirty_pages(inode, index,
max_pages);
if (desired_nr_to_write > max_pages)
--
2.39.5