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Date:   Thu, 2 Nov 2017 12:09:51 +0300
From:   "Kirill A. Shutemov" <>
To:     Takashi Iwai <>
Cc:     Dmitry Vyukov <>,
        Michal Hocko <>, Jan Kara <>,
        Minchan Kim <>,
        Peter Zijlstra <>,,,
        LKML <>,,
        Takashi Iwai <>,
        "Aneesh Kumar K.V" <>,,
        David Rientjes <>,
        Stephen Rothwell <>,
        Andrew Morton <>,, Matthew Wilcox <>,
        "Kirill A. Shutemov" <>
Subject: Re: [alsa-devel] BUG: soft lockup

On Thu, Nov 02, 2017 at 09:23:58AM +0100, Takashi Iwai wrote:
> Currently the least ALSA timer interrupt period is limited to 1ms.
> Does it still too much?
> Can the reproducer triggers it reliably?  If yes, could you forward
> it, too (and config as well), so that I'll try to dig down more exact
> code paths?

All of that is part of original report: hasn't stored repro.c for some reasone. Attached.

I've just check it reproduces reliably for me in KVM.

I also checked that it's not specific to THP -- still trigirable with huge
pages disabled.

 Kirill A. Shutemov

View attachment "repro.c" of type "text/x-c" (4157 bytes)

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