linux-ext4 - Re: [PATCH 1/2] ext4: journal all modifications in ext4_xattr_set

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Date:	Sat, 07 Nov 2009 13:31:02 -0600
From:	Eric Sandeen <sandeen@...hat.com>
To:	Andreas Dilger <adilger@....com>
CC:	Theodore Tso <tytso@....edu>,
	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH 1/2] ext4: journal all modifications in ext4_xattr_set_handle

Andreas Dilger wrote:
> On 2009-11-06, at 19:33, Theodore Tso wrote:

...

>>> I'd also be interested to see the "write shadow buffer to journal"
>>> one-line patch that was discussed in the bug.
>>
>> Which patch are you referring to?
> 
> 
> In bugzilla there was a comment from Chris:
> 
>         "Eric helped prove this is the case by testing a patch that always
>          crcs and writes a stable duplicate of the metadata buffer instead
>          of the metadata buffer itself (a one liner since the log code was
>          already setup for this)."
> 

Like this:

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index b0ab521..75dd58f 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -353,7 +353,7 @@ repeat:
  	/*
  	 * Do we need to do a data copy?
  	 */
-	if (need_copy_out && !done_copy_out) {
+	if (!done_copy_out) {
  		char *tmp;

  		jbd_unlock_bh_state(bh_in);
--
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