From: Pontus Fuchs <pontus.fuchs@gmail.com>
To: peterz@infradead.org
Cc: mingo@redhat.com,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Regression: sched/preempt: Add static_key() to preempt_notifiers breaks my KVM
Date: Thu, 25 Jun 2015 14:00:02 +0200 [thread overview]
Message-ID: <558BED42.1030000@gmail.com> (raw)
Hi,
On 4.1+ kernels I can no longer start my KVM guest. Upon trying to start
it I can see the following log message:
[ 25.821060] BUG: sleeping function called from invalid context at
kernel/locking/mutex.c:97
[ 25.821063] in_atomic(): 1, irqs_disabled(): 0, pid: 2113, name:
qemu-system-x86
[ 25.821066] CPU: 0 PID: 2113 Comm: qemu-system-x86 Not tainted 4.1.0+ #88
[ 25.821067] Hardware name: Dell Inc. Dell System XPS
15Z/00WW5M, BIOS A12 09/07/2012
[ 25.821068] 0000000000000061 ffff88021339bcd8 ffffffff816b8c81
0000000000000007
[ 25.821070] ffff880231159d40 ffff88021339bcf8 ffffffff8107d163
ffff88021339bd18
[ 25.821072] ffffffff81a451bc ffff88021339bd28 ffffffff8107d1ed
ffff8802133a0000
[ 25.821073] Call Trace:
[ 25.821078] [<ffffffff816b8c81>] dump_stack+0x4c/0x65
[ 25.821081] [<ffffffff8107d163>] ___might_sleep+0xd3/0x110
[ 25.821083] [<ffffffff8107d1ed>] __might_sleep+0x4d/0x90
[ 25.821085] [<ffffffff816bde74>] mutex_lock+0x24/0x50
[ 25.821087] [<ffffffff81141ef7>] static_key_slow_inc+0x57/0xc0
[ 25.821089] [<ffffffff8107cafd>] preempt_notifier_register+0x1d/0x60
[ 25.821099] [<ffffffffa04f11fd>] vcpu_load+0x3d/0x70 [kvm]
[ 25.821108] [<ffffffffa050699e>] kvm_arch_vcpu_setup+0x1e/0x50 [kvm]
[ 25.821115] [<ffffffffa05066e1>] ? kvm_arch_vcpu_create+0x51/0x70 [kvm]
[ 25.821120] [<ffffffffa04f29b2>] kvm_vm_ioctl+0x1d2/0x7a0 [kvm]
[ 25.821123] [<ffffffff811b7881>] do_vfs_ioctl+0x301/0x550
[ 25.821124] [<ffffffff811b7b49>] SyS_ioctl+0x79/0x90
[ 25.821127] [<ffffffff816c0257>] entry_SYSCALL_64_fastpath+0x12/0x6a
The offending commit is
commit 1cde2930e15473cb4dd7e5a07d83e605a969bd6e
Author: Peter Zijlstra <peterz@infradead.org>
Date: Mon Jun 8 16:00:30 2015 +0200
sched/preempt: Add static_key() to preempt_notifiers
BR,
Pontus Fuchs
next reply other threads:[~2015-06-25 12:00 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-25 12:00 Pontus Fuchs [this message]
2015-06-25 12:09 ` Regression: sched/preempt: Add static_key() to preempt_notifiers breaks my KVM Peter Zijlstra
2015-06-25 12:15 ` Pontus Fuchs
2015-06-25 12:55 ` [PATCH] sched,kvm: Fix KVM preempt_notifier usage Peter Zijlstra
2015-06-30 11:10 ` [tip:sched/urgent] sched/preempt, kvm: " tip-bot for Peter Zijlstra
2015-07-03 11:23 ` Paolo Bonzini
2015-07-03 11:12 ` [PATCH] sched,kvm: " Paolo Bonzini
2015-07-03 12:19 ` Peter Zijlstra
2015-07-03 12:31 ` Paolo Bonzini
2015-07-03 13:17 ` Peter Zijlstra
2015-07-03 15:16 ` Peter Zijlstra
2015-07-03 15:26 ` Paolo Bonzini
2015-07-03 15:38 ` Paolo Bonzini
2015-07-03 15:42 ` Peter Zijlstra
2015-07-03 15:46 ` Paolo Bonzini
2015-07-03 15:57 ` Takashi Iwai
2015-06-30 13:47 ` Regression: sched/preempt: Add static_key() to preempt_notifiers breaks my KVM Josh Boyer
2015-07-01 6:55 ` Ingo Molnar
2015-07-03 13:15 ` Takashi Iwai
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=558BED42.1030000@gmail.com \
--to=pontus.fuchs@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.