linux-kernel - Re: [PATCH 4/8] writeback: track if we're sleeping on progress in balance_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: <20161102145703.GH13964@lst.de>
Date:   Wed, 2 Nov 2016 15:57:03 +0100
From:   Christoph Hellwig <hch@....de>
To:     Jens Axboe <axboe@...com>
Cc:     axboe@...nel.dk, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        jack@...e.cz, hch@....de
Subject: Re: [PATCH 4/8] writeback: track if we're sleeping on progress in
        balance_dirty_pages()

On Tue, Nov 01, 2016 at 03:08:47PM -0600, Jens Axboe wrote:
> Note in the bdi_writeback structure whenever a task ends up sleeping
> waiting for progress. We can use that information in the lower layers
> to increase the priority of writes.

Do we need to care about atomicy of multiple threads updating the value
?

Otherwise this looks fine.