linux-ext4 - Re: [PATCH 4/4] ext4: reimplement uninit extent optimization for move_extent_per

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] [day] [month] [year] [list]

Message-ID: <20120926165655.GD18983@thunk.org>
Date:	Wed, 26 Sep 2012 12:56:55 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Dmitry Monakhov <dmonakhov@...nvz.org>
Cc:	linux-ext4@...r.kernel.org, a-fujita@...jp.nec.com
Subject: Re: [PATCH 4/4] ext4: reimplement uninit extent optimization for
 move_extent_per_page V2

On Mon, Sep 24, 2012 at 04:23:54PM +0400, Dmitry Monakhov wrote:
> Uninitialized extent may became initialized(parallel writeback task)
> at any moment after we drop i_data_sem, so we have to recheck extent's
> state after we hold page's lock and i_data_sem.
> 
> If we about to change page's mapping we must hold page's lock in order to
> serialize other users.
> Changes from V1 in response to Akira's comments:
> - fix last block mistype
> - Rerutn inital error code
> 
> Signed-off-by: Dmitry Monakhov <dmonakhov@...nvz.org>

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