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  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]
Date:   Wed, 6 May 2020 07:40:10 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Cc:     Christoph Hellwig <hch@...radead.org>,
        linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH RFC 1/2] fs/iomap/direct-io: pass NOWAIT to bio flags

On Mon, May 04, 2020 at 07:23:50PM +0300, Konstantin Khlebnikov wrote:
> On 04/05/2020 19.00, Christoph Hellwig wrote:
> > On Mon, May 04, 2020 at 06:54:53PM +0300, Konstantin Khlebnikov wrote:
> > > This is required to avoid waiting in lower layers.
> > > 
> > > Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
> > 
> > This looks sensible.  Did you run this through xfstests?
> > 
> 
> Nope. It seems xfstests has one trivial test for NOWAIT - generic/471
> It tests only write with/without extent, nothing about contention.
> 
> I've added nowait into fio and played with it a little.
> https://github.com/axboe/fio/pull/972
> 
> With these patches I see EAGAINs when queue is flooded.

Once the fio changes land, can you add a simple fio based test
to xfstests?

Powered by blists - more mailing lists