From: Dmitry Vyukov <dvyukov@google.com>
To: Jiri Kosina <jikos@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Oleg Nesterov <oleg@redhat.com>,
Konstantin Khlebnikov <koct9i@gmail.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>, Takashi Iwai <tiwai@suse.de>,
syzkaller <syzkaller@googlegroups.com>,
Kostya Serebryany <kcc@google.com>,
Alexander Potapenko <glider@google.com>,
Sasha Levin <sasha.levin@oracle.com>
Subject: Re: [PATCH v2] floppy: refactor open() flags handling (was Re: mm: uninterruptable tasks hanged on mmap_sem)
Date: Fri, 5 Feb 2016 22:16:05 +0100 [thread overview]
Message-ID: <CACT4Y+Zb1Ne15MTyu6KMTD+FtFQob1UPg-mHDmTS3c6F5rNJ=A@mail.gmail.com> (raw)
In-Reply-To: <alpine.LNX.2.00.1602051739331.22727@cbobk.fhfr.pm>
On Fri, Feb 5, 2016 at 5:40 PM, Jiri Kosina <jikos@kernel.org> wrote:
> On Fri, 5 Feb 2016, Dmitry Vyukov wrote:
>
>> I don't have any objections. And I agree that it does not make sense
>> to spend any considerable time on optimizing this driver.
>
> Yeah, on a second thought this definitely is the way how to deal with this
> in this particular driver.
>
>> > Alternatively we can take more conservative aproach, accept the
>> > nonblocking flag, but do the regular business of the driver.
>> >
>> > Actually, let's try that, to make sure that we don't introduce userspace
>> > breakage.
>> >
>> > Could you please retest with the patch below?
>>
>> Reapplied.
>
> Thanks. Once/if you confirm that syzkaller is not able to reproduce the
> problem any more, I'll queue it and push to Jens.
Tested. Fixes the hang for me.
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prev parent reply other threads:[~2016-02-05 21:16 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-02 20:59 mm: uninterruptable tasks hanged on mmap_sem Dmitry Vyukov
2016-02-02 21:08 ` Jiri Kosina
2016-02-02 21:14 ` Dmitry Vyukov
2016-02-02 21:20 ` Dmitry Vyukov
2016-02-02 21:24 ` Jiri Kosina
2016-02-02 21:29 ` Dmitry Vyukov
2016-02-03 13:11 ` Jiri Kosina
2016-02-03 13:18 ` Dmitry Vyukov
2016-02-03 23:34 ` Jiri Kosina
2016-02-04 21:22 ` [PATCH] floppy: refactor open() flags handling (was Re: mm: uninterruptable tasks hanged on mmap_sem) Jiri Kosina
2016-02-05 13:43 ` Dmitry Vyukov
2016-02-05 13:51 ` [PATCH v2] " Jiri Kosina
2016-02-05 14:26 ` Dmitry Vyukov
2016-02-05 16:40 ` Jiri Kosina
2016-02-05 21:16 ` Dmitry Vyukov [this message]
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