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From: Jan Kara <jack@suse.cz>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	"Theodore Ts'o" <tytso@mit.edu>,
	"Artem S. Tashkinov" <t.artem@lycos.com>,
	Wu Fengguang <fengguang.wu@intel.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	mgorman@suse.de
Subject: Re: Disabling in-memory write cache for x86-64 in Linux II
Date: Tue, 29 Oct 2013 21:57:56 +0100	[thread overview]
Message-ID: <20131029205756.GH9568@quack.suse.cz> (raw)
In-Reply-To: <CA+55aFzq4-wsErRO56gW6gj3Q91QtvvaGQPdUV2JkSs-B1PCAQ@mail.gmail.com>

On Fri 25-10-13 10:32:16, Linus Torvalds wrote:
> On Fri, Oct 25, 2013 at 10:29 AM, Andrew Morton
> <akpm@linux-foundation.org> wrote:
> >
> > Apparently all this stuff isn't working as desired (and perhaps as designed)
> > in this case.  Will take a look after a return to normalcy ;)
> 
> It definitely doesn't work. I can trivially reproduce problems by just
> having a cheap (==slow) USB key with an ext3 filesystem, and going a
> git clone to it. The end result is not pretty, and that's actually not
> even a huge amount of data.
  I'll try to reproduce this tomorrow so that I can have a look where
exactly are we stuck. But in last few releases problems like this were
caused by problems in reclaim which got fed up by seeing lots of dirty
/ under writeback pages and ended up stuck waiting for IO to finish. Mel
has been tweaking the logic here and there but maybe it haven't got fixed
completely. Mel, do you know about any outstanding issues?

								Honza
-- 
Jan Kara <jack@suse.cz>
SUSE Labs, CR

  parent reply	other threads:[~2013-10-29 20:58 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-10-25  7:25 Disabling in-memory write cache for x86-64 in Linux II Artem S. Tashkinov
2013-10-25  8:18 ` Linus Torvalds
2013-10-25  8:30   ` Artem S. Tashkinov
2013-10-25  8:43     ` Linus Torvalds
2013-10-25  9:15       ` Karl Kiniger
2013-10-29 20:30         ` Jan Kara
2013-10-29 20:43           ` Andrew Morton
2013-10-29 21:30             ` Jan Kara
2013-10-29 21:36             ` Linus Torvalds
2013-10-31 14:26           ` Karl Kiniger
2013-11-01 14:25             ` Maxim Patlasov
2013-11-01 14:31             ` [PATCH] mm: add strictlimit knob Maxim Patlasov
2013-11-04 22:01               ` Andrew Morton
2013-11-06 14:30                 ` Maxim Patlasov
2013-11-06 15:05                 ` [PATCH] mm: add strictlimit knob -v2 Maxim Patlasov
2013-11-07 12:26                   ` Henrique de Moraes Holschuh
2013-11-22 23:45                   ` Andrew Morton
2013-10-25 11:28       ` Disabling in-memory write cache for x86-64 in Linux II David Lang
2013-10-25  9:18     ` Theodore Ts'o
2013-10-25  9:29       ` Andrew Morton
2013-10-25  9:32         ` Linus Torvalds
2013-10-26 11:32           ` Pavel Machek
2013-10-26 20:03             ` Linus Torvalds
2013-10-29 20:57           ` Jan Kara [this message]
2013-10-29 21:33             ` Linus Torvalds
2013-10-29 22:13               ` Jan Kara
2013-10-29 22:42                 ` Linus Torvalds
2013-11-01 17:22                   ` Fengguang Wu
2013-11-04 12:19                     ` Pavel Machek
2013-11-04 12:26                   ` Pavel Machek
2013-10-30 12:01             ` Mel Gorman
2013-11-19 17:17               ` Rob Landley
2013-11-20 20:52                 ` One Thousand Gnomes
2013-10-25 22:37         ` Fengguang Wu
2013-10-25 23:05       ` Fengguang Wu
2013-10-25 23:37         ` Theodore Ts'o
2013-10-29 20:40           ` Jan Kara
2013-10-30 10:07             ` Artem S. Tashkinov
2013-10-30 15:12               ` Jan Kara
2013-11-05  0:50   ` Andreas Dilger
2013-11-05  4:12     ` Dave Chinner
2013-11-07 13:48       ` Jan Kara
2013-11-11  3:22         ` Dave Chinner
2013-11-11 19:31           ` Jan Kara
2013-10-25 10:49 ` NeilBrown
2013-10-25 11:26   ` David Lang
2013-10-25 18:26     ` Artem S. Tashkinov
2013-10-25 19:40       ` Diego Calleja
2013-10-25 23:32         ` Fengguang Wu
2013-11-15 15:48           ` Diego Calleja
2013-10-25 20:43       ` NeilBrown
2013-10-25 21:03         ` Artem S. Tashkinov
2013-10-25 22:11           ` NeilBrown
     [not found]             ` <CAF7GXvpJVLYDS5NfH-NVuN9bOJjAS5c1MQqSTjoiVBHJt6bWcw@mail.gmail.com>
2013-11-05  1:47               ` David Lang
2013-11-05  2:08               ` NeilBrown
2013-10-29 20:49       ` Jan Kara

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