linux-kernel - Re: [PATCH] JBD slab cleanups

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Message-Id: <1190239431.4318.34.camel@localhost.localdomain>
Date:	Wed, 19 Sep 2007 15:03:51 -0700
From:	Mingming Cao <cmm@...ibm.com>
To:	Andreas Dilger <adilger@...sterfs.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Kleikamp <shaggy@...ux.vnet.ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	Badari Pulavarty <pbadari@...ibm.com>,
	Christoph Lameter <clameter@....com>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	ext4 development <linux-ext4@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	"Stephen C. Tweedie" <sct@...hat.com>
Subject: Re: [PATCH] JBD slab cleanups

On Wed, 2007-09-19 at 13:48 -0600, Andreas Dilger wrote:
> On Sep 19, 2007  12:15 -0700, Mingming Cao wrote:
> > @@ -96,8 +96,7 @@ static int start_this_handle(journal_t *
> >  
> >  alloc_transaction:
> >  	if (!journal->j_running_transaction) {
> > -		new_transaction = kmalloc(sizeof(*new_transaction),
> > -						GFP_NOFS|__GFP_NOFAIL);
> > +		new_transaction = kmalloc(sizeof(*new_transaction), GFP_NOFS);
> 
> This should probably be a __GFP_NOFAIL if we are trying to start a new
> handle in truncate, as there is no way to propagate an error to the caller.
> 

Thanks, updated version.

Here is the patch to clean up __GFP_NOFAIL flag in jbd/jbd2, most cases
they are not needed.

Signed-off-by: Mingming Cao <cmm@...ibm.com>
---
 fs/jbd/journal.c  |    2 +-
 fs/jbd2/journal.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6.23-rc6/fs/jbd/journal.c
===================================================================
--- linux-2.6.23-rc6.orig/fs/jbd/journal.c	2007-09-19 11:47:58.000000000 -0700
+++ linux-2.6.23-rc6/fs/jbd/journal.c	2007-09-19 14:23:45.000000000 -0700
@@ -653,7 +653,7 @@ static journal_t * journal_init_common (
 	journal_t *journal;
 	int err;
 
-	journal = kmalloc(sizeof(*journal), GFP_KERNEL|__GFP_NOFAIL);
+	journal = kmalloc(sizeof(*journal), GFP_KERNEL);
 	if (!journal)
 		goto fail;
 	memset(journal, 0, sizeof(*journal));
Index: linux-2.6.23-rc6/fs/jbd2/journal.c
===================================================================
--- linux-2.6.23-rc6.orig/fs/jbd2/journal.c	2007-09-19 11:48:14.000000000 -0700
+++ linux-2.6.23-rc6/fs/jbd2/journal.c	2007-09-19 14:23:45.000000000 -0700
@@ -654,7 +654,7 @@ static journal_t * journal_init_common (
 	journal_t *journal;
 	int err;
 
-	journal = kmalloc(sizeof(*journal), GFP_KERNEL|__GFP_NOFAIL);
+	journal = kmalloc(sizeof(*journal), GFP_KERNEL);
 	if (!journal)
 		goto fail;
 	memset(journal, 0, sizeof(*journal));


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