From: Willy Tarreau <w@1wt.eu>
To: Jarek Poplawski <jarkao2@gmail.com>
Cc: Jens Axboe <jens.axboe@oracle.com>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: Data corruption issue with splice() on 2.6.27.10
Date: Tue, 6 Jan 2009 11:04:08 +0100 [thread overview]
Message-ID: <20090106100408.GA25957@1wt.eu> (raw)
In-Reply-To: <20090106100112.GB9513@ff.dom.local>
On Tue, Jan 06, 2009 at 10:01:13AM +0000, Jarek Poplawski wrote:
> On Tue, Jan 06, 2009 at 10:41:38AM +0100, Willy Tarreau wrote:
> ...
> > > Great story! Alas I don't understand this fully either, but it seems
> > > Changli Gao was concerned with sendpage sending this "as pages", so
> > > when NETIF_F_SG flag is available. Did you try this without SG btw?
> >
> > No I did not. I can try, it's not too hard. It would in part defeat the
> > purpose of the mechanism (especially at 10 Gbps) but at least it will
> > help narrow the problem down.
>
> Yes, I meant it only as a proof of concept. BTW, delaying TCP acks a
> bit for these sendpages should then make it more reproducible, I guess.
ah ? I can try that too, using iptables on the target machine to drop
a few outgoing acks.
Regards,
Willy
next prev parent reply other threads:[~2009-01-06 10:04 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-24 15:28 Data corruption issue with splice() on 2.6.27.10 Willy Tarreau
2009-01-06 8:54 ` Jarek Poplawski
2009-01-06 9:41 ` Willy Tarreau
2009-01-06 10:01 ` Jarek Poplawski
2009-01-06 10:04 ` Willy Tarreau [this message]
2009-01-06 15:57 ` Willy Tarreau
2009-01-07 9:39 ` Jarek Poplawski
2009-01-07 12:22 ` Willy Tarreau
2009-01-07 12:24 ` Herbert Xu
2009-01-07 12:38 ` Jarek Poplawski
2009-01-07 12:31 ` Jarek Poplawski
2009-01-07 12:35 ` Jens Axboe
2009-01-07 12:40 ` Evgeniy Polyakov
2009-01-07 12:52 ` Willy Tarreau
2009-01-07 12:53 ` Herbert Xu
2009-01-07 12:57 ` Evgeniy Polyakov
2009-01-07 13:08 ` Willy Tarreau
2009-01-07 12:49 ` Jarek Poplawski
2009-01-07 12:52 ` Herbert Xu
2009-01-07 13:00 ` Willy Tarreau
2009-01-07 13:01 ` Herbert Xu
2009-01-07 13:02 ` Jarek Poplawski
2009-01-12 12:02 ` Herbert Xu
2009-01-12 12:45 ` Evgeniy Polyakov
2009-01-12 12:56 ` Herbert Xu
2009-01-12 12:59 ` Evgeniy Polyakov
2009-01-12 21:11 ` Herbert Xu
2009-01-12 13:15 ` Jarek Poplawski
2009-01-12 21:12 ` Herbert Xu
2009-01-19 7:32 ` Jarek Poplawski
2009-01-07 12:39 ` Willy Tarreau
2009-01-07 12:56 ` Jarek Poplawski
2009-01-07 12:44 ` Herbert Xu
2009-01-06 17:42 ` Ben Mansell
2009-01-06 18:15 ` Willy Tarreau
2009-01-08 7:16 ` Jarek Poplawski
2009-01-08 8:05 ` Willy Tarreau
2009-01-08 14:53 ` Ingo Molnar
2009-01-08 15:16 ` Ben Mansell
2009-01-08 17:14 ` Willy Tarreau
2009-01-06 18:32 ` Evgeniy Polyakov
2009-01-06 18:37 ` Jens Axboe
2009-01-06 18:55 ` Willy Tarreau
2009-01-07 4:42 ` Herbert Xu
2009-01-07 6:38 ` Willy Tarreau
2009-01-07 9:52 ` Herbert Xu
2009-01-07 9:54 ` Willy Tarreau
2009-01-07 11:52 ` Herbert Xu
2009-01-07 8:17 ` Jens Axboe
2009-01-07 11:29 ` Evgeniy Polyakov
2009-01-07 11:50 ` Herbert Xu
2009-01-07 11:56 ` Evgeniy Polyakov
2009-01-07 11:59 ` Herbert Xu
2009-01-07 12:15 ` Evgeniy Polyakov
2009-01-07 12:22 ` Herbert Xu
2009-01-07 12:27 ` Herbert Xu
2009-01-07 12:30 ` Herbert Xu
2009-01-07 12:37 ` Evgeniy Polyakov
2009-01-07 12:42 ` Herbert Xu
2009-01-07 12:46 ` Evgeniy Polyakov
2009-01-07 12:55 ` Willy Tarreau
2009-01-07 12:57 ` Herbert Xu
2009-01-07 13:02 ` Evgeniy Polyakov
2009-01-07 13:10 ` Jarek Poplawski
2009-01-07 13:15 ` Willy Tarreau
2009-01-07 13:22 ` Jarek Poplawski
2009-01-07 14:01 ` Jarek Poplawski
2009-01-06 18:50 ` Willy Tarreau
2009-01-19 8:39 ` Lennert Buytenhek
2009-01-19 9:53 ` Willy Tarreau
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