From: Avi Kivity <avi@redhat.com>
To: Sasha Levin <levinsasha928@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
Pekka Enberg <penberg@kernel.org>, Dave Jones <davej@redhat.com>,
linux-mm@kvack.org,
"linux-kernel@vger.kernel.org List"
<linux-kernel@vger.kernel.org>
Subject: Re: mm: hung task (handle_pte_fault)
Date: Sun, 25 Mar 2012 13:10:55 +0200 [thread overview]
Message-ID: <4F6EFD3F.5010706@redhat.com> (raw)
In-Reply-To: <CA+1xoqczdjPD0OGEuZAu6f9Q8gxAQuhVL-ZhhUcELaz_B=Jfjg@mail.gmail.com>
On 03/23/2012 12:45 PM, Sasha Levin wrote:
> Hi guys,
>
> During fuzzing using trinity inside a KVM tools guest with latest
> linux-next, I seem to be getting it hung once in a while, with the
> following spew:
>
> [ 1441.420617] INFO: task trinity:2706 blocked for more than 120 seconds.
> [ 1441.421894] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
> disables this message.
> [ 1441.424493] trinity D 0000000000000000 3472 2706 16846 0x00000004
> [ 1441.426749] ffff880029dbbb38 0000000000000086 ffff880029dbbae8
> ffff880029dbbfd8
> [ 1441.428582] 00000000001d45c0 ffff880029dba000 00000000001d45c0
> 00000000001d45c0
> [ 1441.430156] 00000000001d45c0 00000000001d45c0 ffff880029dbbfd8
> 00000000001d45c0
> [ 1441.432371] Call Trace:
> [ 1441.433042] [<ffffffff81176dd0>] ? file_read_actor+0x1d0/0x1d0
> [ 1441.434251] [<ffffffff827148d4>] schedule+0x24/0x70
> [ 1441.435314] [<ffffffff82714e67>] io_schedule+0x87/0xd0
> [ 1441.436357] [<ffffffff81176dd9>] sleep_on_page+0x9/0x10
> [ 1441.437442] [<ffffffff82712cb7>] __wait_on_bit+0x57/0x80
> [ 1441.438584] [<ffffffff81177bff>] ? __lock_page_or_retry+0x8f/0xd0
> [ 1441.439948] [<ffffffff811775de>] wait_on_page_bit+0x6e/0x80
> [ 1441.440859] [<ffffffff810d6d20>] ? autoremove_wake_function+0x40/0x40
> [ 1441.441700] [<ffffffff810dbfbe>] ? up_read+0x1e/0x40
> [ 1441.442428] [<ffffffff81177c36>] __lock_page_or_retry+0xc6/0xd0
> [ 1441.443270] [<ffffffff81178490>] filemap_fault+0x440/0x4e0
> [ 1441.444072] [<ffffffff811991cf>] __do_fault+0x7f/0x5f0
> [ 1441.444829] [<ffffffff81112c00>] ?
> add_lock_to_list.clone.18.clone.27+0xd0/0xe0
> [ 1441.445886] [<ffffffff8119cd27>] handle_pte_fault+0xf7/0x1e0
> [ 1441.446740] [<ffffffff8119e1ce>] handle_mm_fault+0x1ce/0x330
> [ 1441.447537] [<ffffffff8119e53c>] __get_user_pages+0x14c/0x640
> [ 1441.448399] [<ffffffff811129ae>] ? put_lock_stats.clone.19+0xe/0x40
> [ 1441.449288] [<ffffffff81117b1d>] ? __lock_acquired+0x19d/0x270
> [ 1441.450164] [<ffffffff811a0087>] __mlock_vma_pages_range+0x87/0xa0
> [ 1441.451127] [<ffffffff811a0129>] do_mlock_pages+0x89/0x160
> [ 1441.451932] [<ffffffff811a0b71>] sys_mlockall+0x111/0x1a0
> [ 1441.452761] [<ffffffff827176bd>] system_call_fastpath+0x1a/0x1f
> [ 1441.453659] no locks held by trinity/2706.
> [ 1441.454267] Kernel panic - not syncing: hung_task: blocked tasks
>
> According to the logs, it's not the direct result of anything specific
> happening, so I can't give an exact scenario to reproduce it. It does
> happen rather often.
>
Ingo notes that this could well be a kvm problem. Does your processor
support EPT/NPT? Can you provide kvm_stat and traces of what's
happening in the host when this triggers?
--
error compiling committee.c: too many arguments to function
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2012-03-25 11:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-23 10:45 mm: hung task (handle_pte_fault) Sasha Levin
2012-03-25 11:10 ` Avi Kivity [this message]
2012-03-26 23:17 ` Andrew Morton
2012-03-27 23:53 ` Sasha Levin
2012-03-28 4:53 ` Hugh Dickins
2012-03-28 17:35 ` Naoya Horiguchi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4F6EFD3F.5010706@redhat.com \
--to=avi@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=davej@redhat.com \
--cc=hughd@google.com \
--cc=levinsasha928@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mingo@elte.hu \
--cc=penberg@kernel.org \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).