From: Guenter Roeck <linux@roeck-us.net>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
sparclinux@vger.kernel.org, davem@davemloft.net
Subject: Re: next: Commit 'mm: Prevent __alloc_pages_nodemask() RCU CPU stall ...' causing hang on sparc32 qemu
Date: Wed, 30 Nov 2016 22:56:57 -0800 [thread overview]
Message-ID: <20161201065657.GA4697@roeck-us.net> (raw)
In-Reply-To: <20161201011950.GX3924@linux.vnet.ibm.com>
Hi Paul,
On Wed, Nov 30, 2016 at 05:19:50PM -0800, Paul E. McKenney wrote:
[ ... ]
> > > >
> > > > BUG: sleeping function called from invalid context at mm/page_alloc.c:3775
[ ... ]
>
> Whew! You had me going for a bit there. ;-)
Bisect results are here ... the culprit is, again, commit 2d66cccd73 ("mm:
Prevent __alloc_pages_nodemask() RCU CPU stall warnings"), and reverting that
patch fixes the problem. Good that you dropped it already :-).
Guenter
---
# bad: [59ab0083490c8a871b51e893bae5806e55901d7e] Add linux-next specific files for 20161130
# good: [e5517c2a5a49ed5e99047008629f1cd60246ea0e] Linux 4.9-rc7
git bisect start 'HEAD' 'v4.9-rc7'
# good: [187f99e5c22bb3fab8b330f3ebbbd235d238f3f8] Merge remote-tracking branch 'crypto/master'
git bisect good 187f99e5c22bb3fab8b330f3ebbbd235d238f3f8
# good: [36126657c908e822523b8563f9b1512937c0f342] Merge remote-tracking branch 'tip/auto-latest'
git bisect good 36126657c908e822523b8563f9b1512937c0f342
# good: [2d2139c5c746ec61024fdfa9c36e4e034bb18e59] Merge tag 'iio-for-4.10d' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next
git bisect good 2d2139c5c746ec61024fdfa9c36e4e034bb18e59
# bad: [926a60551123048c589b45abee2a2ec4c924ab21] Merge remote-tracking branch 'extcon/extcon-next'
git bisect bad 926a60551123048c589b45abee2a2ec4c924ab21
# bad: [1541655795a90720b8a094c8cc39f582dec17398] Merge remote-tracking branch 'tty/tty-next'
git bisect bad 1541655795a90720b8a094c8cc39f582dec17398
# bad: [69a6720a1e54519d9bf8563764e9e93bf1bd6a84] Merge remote-tracking branch 'kvm-arm/next'
git bisect bad 69a6720a1e54519d9bf8563764e9e93bf1bd6a84
# good: [33b8b045b93f9104c61ecad1865af961b3bef03e] Merge remote-tracking branch 'ftrace/for-next'
git bisect good 33b8b045b93f9104c61ecad1865af961b3bef03e
# good: [8370c3d08bd98576d97514eca29970e03767a5d1] kvm: svm: Add kvm_fast_pio_in support
git bisect good 8370c3d08bd98576d97514eca29970e03767a5d1
# good: [0a895142323de3eebb0b753d3d8c0e768ff179d9] mm: Prevent shrink_node() RCU CPU stall warnings
git bisect good 0a895142323de3eebb0b753d3d8c0e768ff179d9
# bad: [f8045446ca778333e960dcb9e30a5858ff2b8c20] srcu: Force full grace-period ordering
git bisect bad f8045446ca778333e960dcb9e30a5858ff2b8c20
# good: [f660d64912ccadadcdce6dfb39eb06924dd93767] doc: Fix RCU requirements typos
git bisect good f660d64912ccadadcdce6dfb39eb06924dd93767
# good: [d2db185bfee894c573faebed93461e9938bdbb61] rcu: Remove short-term CPU kicking
git bisect good d2db185bfee894c573faebed93461e9938bdbb61
# bad: [2d66cccd73436ac9985a08e5c2f82e4344f72264] mm: Prevent __alloc_pages_nodemask() RCU CPU stall warnings
git bisect bad 2d66cccd73436ac9985a08e5c2f82e4344f72264
# good: [34c53f5cd399801b083047cc9cf2ad3ed17c3144] mm: Prevent shrink_node_memcg() RCU CPU stall warnings
git bisect good 34c53f5cd399801b083047cc9cf2ad3ed17c3144
# first bad commit: [2d66cccd73436ac9985a08e5c2f82e4344f72264] mm: Prevent __alloc_pages_nodemask() RCU CPU stall warnings
--
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/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2016-12-01 6:57 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-29 21:23 next: Commit 'mm: Prevent __alloc_pages_nodemask() RCU CPU stall ...' causing hang on sparc32 qemu Guenter Roeck
2016-11-30 1:28 ` Paul E. McKenney
2016-11-30 4:32 ` Guenter Roeck
2016-11-30 7:02 ` Paul E. McKenney
2016-11-30 10:52 ` Guenter Roeck
2016-11-30 12:03 ` Paul E. McKenney
2016-11-30 19:21 ` Guenter Roeck
2016-11-30 21:01 ` Paul E. McKenney
2016-11-30 23:18 ` Guenter Roeck
2016-12-01 1:19 ` Paul E. McKenney
2016-12-01 6:56 ` Guenter Roeck [this message]
2016-12-01 12:34 ` Paul E. McKenney
2016-12-01 12:50 ` Guenter Roeck
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=20161201065657.GA4697@roeck-us.net \
--to=linux@roeck-us.net \
--cc=akpm@linux-foundation.org \
--cc=davem@davemloft.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=paulmck@linux.vnet.ibm.com \
--cc=sparclinux@vger.kernel.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 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).