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Date: Tue, 29 Jan 2013 15:59:17 -0800 From: Andrew Morton <akpm@...ux-foundation.org> To: Don Zickus <dzickus@...hat.com> Cc: Mike Lykov <combr@...dex.ru>, Ingo Molnar <mingo@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org, kirill@...temov.name Subject: Re: [BUG?] false positive in soft lockup detector while unlzma initramfs on slow cpu On Tue, 29 Jan 2013 10:33:48 -0500 Don Zickus <dzickus@...hat.com> wrote: > --- a/kernel/watchdog.c > +++ b/kernel/watchdog.c > @@ -79,6 +79,14 @@ static int __init softlockup_panic_setup(char *str) > } > __setup("softlockup_panic=", softlockup_panic_setup); > > +static int __init watchdog_thresh_setup(char *str) > +{ > + watchdog_thresh = simple_strtoul(str, NULL, 0); > + > + return 1; > +} > +__setup("watchdog_thresh=", watchdog_thresh_setup); I wonder if there's some magical way in which we can set any sysctl from the kernel command line. Add sys.vm.min_free_kbytes=42 to the command line, walk the hierarchy late in boot... To address Mike's bug I suggest we poke a touch_softlockup_watchdog() into the appropriate place. Presumably the loop in lib/decompress_unlzma.c:unlzma(). The decompress code makes me cry. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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