From: Tejun Heo <tj@kernel.org>
To: Hugh Dickins <hughd@google.com>
Cc: Jens Axboe <axboe@kernel.dk>,
Andrew Morton <akpm@linux-foundation.org>,
Stephen Rothwell <sfr@canb.auug.org.au>,
linux-next@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org,
x86@kernel.org
Subject: Re: [PATCH block/for-3.3/core] block: an exiting task should be allowed to create io_context
Date: Wed, 28 Dec 2011 13:19:18 -0800 [thread overview]
Message-ID: <20111228211918.GA3516@google.com> (raw)
In-Reply-To: <CAOS58YOzUcZz41+H+7dk5FteHy+Ufrtpk9dvdPqX6eie-GHi0Q@mail.gmail.com>
On Wed, Dec 28, 2011 at 09:55:12AM -0800, Tejun Heo wrote:
> Hello,
>
> On Wed, Dec 28, 2011 at 9:50 AM, Hugh Dickins <hughd@google.com> wrote:
> > "It's the tmpfs swapping test that I've been running, with variations,
> > for years. System booted with mem=700M and 1.5G swap, two repetitious
> > make -j20 kernel builds (of a 2.6.24 kernel: I stuck with that because
> > the balance of built to unbuilt source grows smaller with later kernels),
> > one directly in a tmpfs, the other in a 1k-block ext2 (that I drive with
> > ext4's CONFIG_EXT4_USE_FOR_EXT23) on /dev/loop0 on a 450MB tmpfs file."
> >
> > I doubt much of that (quoted from an older mail to someone else about
> > one of the many other bugs it's found) is relevant: maybe just plenty
> > of file I/O and swapping.
>
> Plain -j4 build isn't triggering anything. I'll try to replicate the condition.
It's not too reliable but I can reproduce it with -j 22 allmodconfig
build inside qemu w/ 512M of memory. I'll try to find out what's
going on.
Thanks.
--
tejun
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WARNING: multiple messages have this Message-ID (diff)
From: Tejun Heo <tj@kernel.org>
To: Hugh Dickins <hughd@google.com>
Cc: Jens Axboe <axboe@kernel.dk>,
Andrew Morton <akpm@linux-foundation.org>,
Stephen Rothwell <sfr@canb.auug.org.au>,
linux-next@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org,
x86@kernel.org
Subject: Re: [PATCH block/for-3.3/core] block: an exiting task should be allowed to create io_context
Date: Wed, 28 Dec 2011 13:19:18 -0800 [thread overview]
Message-ID: <20111228211918.GA3516@google.com> (raw)
In-Reply-To: <CAOS58YOzUcZz41+H+7dk5FteHy+Ufrtpk9dvdPqX6eie-GHi0Q@mail.gmail.com>
On Wed, Dec 28, 2011 at 09:55:12AM -0800, Tejun Heo wrote:
> Hello,
>
> On Wed, Dec 28, 2011 at 9:50 AM, Hugh Dickins <hughd@google.com> wrote:
> > "It's the tmpfs swapping test that I've been running, with variations,
> > for years. System booted with mem=700M and 1.5G swap, two repetitious
> > make -j20 kernel builds (of a 2.6.24 kernel: I stuck with that because
> > the balance of built to unbuilt source grows smaller with later kernels),
> > one directly in a tmpfs, the other in a 1k-block ext2 (that I drive with
> > ext4's CONFIG_EXT4_USE_FOR_EXT23) on /dev/loop0 on a 450MB tmpfs file."
> >
> > I doubt much of that (quoted from an older mail to someone else about
> > one of the many other bugs it's found) is relevant: maybe just plenty
> > of file I/O and swapping.
>
> Plain -j4 build isn't triggering anything. I'll try to replicate the condition.
It's not too reliable but I can reproduce it with -j 22 allmodconfig
build inside qemu w/ 512M of memory. I'll try to find out what's
going on.
Thanks.
--
tejun
next prev parent reply other threads:[~2011-12-28 21:19 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-21 6:47 linux-next: Tree for Dec 21 Stephen Rothwell
2011-12-21 20:11 ` linux-next: Tree for Dec 21 (xen) Randy Dunlap
2011-12-21 19:30 ` Konrad Rzeszutek Wilk
2011-12-21 20:32 ` [PATCH] usb: fix renesas mod_gadget printk format warning Randy Dunlap
2011-12-21 21:16 ` Felipe Balbi
2011-12-21 22:19 ` Randy Dunlap
2011-12-21 21:24 ` Greg KH
2011-12-21 23:15 ` linux-next: Tree for Dec 21 Andrew Morton
2011-12-22 23:08 ` Andrew Morton
2011-12-22 23:20 ` Tejun Heo
2011-12-22 23:24 ` Andrew Morton
2011-12-22 23:38 ` Tejun Heo
2011-12-22 23:44 ` Andrew Morton
2011-12-22 23:46 ` Tejun Heo
2011-12-23 0:42 ` Tejun Heo
2011-12-24 5:13 ` Hugh Dickins
2011-12-25 1:02 ` [PATCH block/for-3.3/core] block: an exiting task should be allowed to create io_context Tejun Heo
2011-12-25 13:29 ` Jens Axboe
2011-12-27 22:07 ` Andrew Morton
2011-12-28 8:33 ` Hugh Dickins
2011-12-28 16:48 ` Tejun Heo
2011-12-28 17:50 ` Hugh Dickins
2011-12-28 17:55 ` Tejun Heo
2011-12-28 21:19 ` Tejun Heo [this message]
2011-12-28 21:19 ` Tejun Heo
2012-01-03 17:35 ` Tejun Heo
2012-01-03 17:59 ` Tejun Heo
2012-01-03 20:09 ` Tejun Heo
2012-01-03 20:20 ` Jens Axboe
2012-01-03 22:13 ` Tejun Heo
2012-01-03 22:35 ` Tejun Heo
2012-01-05 1:24 ` Tejun Heo
2012-01-05 18:36 ` Hugh Dickins
2012-01-05 18:38 ` Tejun Heo
2012-01-06 2:17 ` [PATCH block:for-3.3/core] cfq: merged request shouldn't jump to a different cfqq Tejun Heo
2012-01-06 2:36 ` Tejun Heo
2012-01-06 3:14 ` Shaohua Li
2012-01-06 3:04 ` Tejun Heo
2012-01-06 3:30 ` Tejun Heo
2012-01-06 3:52 ` [PATCH block:for-3.3/core] block: disable ELEVATOR_INSERT_SORT_MERGE Tejun Heo
2012-01-06 4:19 ` Shaohua Li
2012-01-06 4:38 ` Tejun Heo
2012-01-06 8:15 ` Shaohua Li
2012-01-06 15:34 ` Tejun Heo
2012-01-06 3:34 ` [PATCH block:for-3.3/core] cfq: merged request shouldn't jump to a different cfqq Shaohua Li
2012-01-06 3:22 ` Tejun Heo
2012-01-06 4:15 ` Shaohua Li
2012-01-06 4:40 ` Tejun Heo
2012-01-06 2:47 ` Shaohua Li
2011-12-25 16:08 ` linux-next: Tree for Dec 21 Sedat Dilek
2011-12-25 23:55 ` Stephen Rothwell
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