From: Eric Sandeen <sandeen@redhat.com>
To: ext4 development <linux-ext4@vger.kernel.org>
Subject: [PATCH 0/2] ext4: a couple writeback path fixes
Date: Tue, 31 Aug 2010 08:56:16 -0500 [thread overview]
Message-ID: <4C7D0A00.40601@redhat.com> (raw)
I've found a couple small problems in the ext4_da_writepages path;
1) ext4_num_dirty_pages() can continue looping after max_pages is reached
- this leads to wasted cpu cycles during writeback
2) bumping nr_to_write can wrap if we started with LONG_MAX
- Not sure of all ramifications, but nr_to_write = -8 can't be good
-Eric
next reply other threads:[~2010-08-31 13:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-31 13:56 Eric Sandeen [this message]
2010-08-31 13:59 ` PATCH 1/2] ext4: stop looping in ext4_num_dirty_pages when max_pages reached Eric Sandeen
2010-08-31 14:04 ` [PATCH 2/2] ext4: don't bump nr_to_write if LONG_MAX Eric Sandeen
2010-08-31 14:20 ` [PATCH 2/2 V2] " Eric Sandeen
2010-09-03 21:37 ` Eric Sandeen
2010-09-03 22:11 ` [PATCH 0/2] ext4: a couple writeback path fixes Eric Sandeen
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