linux-ext4 - Re: [PATCH 5/5] jbd2: Speedup jbd2_journal_dirty

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150608165037.GN19168@thunk.org>
Date:	Mon, 8 Jun 2015 12:50:37 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 5/5] jbd2: Speedup jbd2_journal_dirty_metadata()

On Thu, Apr 02, 2015 at 03:58:20PM +0200, Jan Kara wrote:
> It is often the case that we mark buffer as having dirty metadata when
> the buffer is already in that state (frequent for bitmaps, inode table
> blocks, superblock). Thus it is unnecessary to contend on grabbing
> journal head reference and bh_state lock. Avoid that by checking whether
> any modification to the buffer is needed before grabbing any locks or
> references.
> 
> Signed-off-by: Jan Kara <jack@...e.cz>

Thanks, applied.

						- Ted
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html