From: Eric Sandeen <sandeen@redhat.com>
Date: Thu, 7 Dec 2006 04:40:13 +0000 (-0800)
Subject: [PATCH] ext3/4: don't do orphan processing on readonly devices
X-Git-Tag: v2.6.20-rc1~145^2^2~62
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a8f48a95619cbce8f85423480e7d0a1bf971a62b;p=pandora-kernel.git

[PATCH] ext3/4: don't do orphan processing on readonly devices

If you do something like:

  # touch foo
  # tail -f foo &
  # rm foo
  # <take snapshot>
  # <mount snapshot>

you'll panic, because ext3/4 tries to do orphan list processing on the
readonly snapshot device, and:

  kernel: journal commit I/O error
  kernel: Assertion failure in journal_flush_Rsmp_e2f189ce() at journal.c:1356: "!journal->j_checkpoint_transactions"
  kernel: Kernel panic: Fatal exception

for a truly readonly underlying device, it's reasonable and necessary
to just skip orphan list processing.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

Reading git-diff-tree failed