Messages in this thread | | | Date | Tue, 29 Jan 2013 15:59:17 -0800 | From | Andrew Morton <> | Subject | Re: [BUG?] false positive in soft lockup detector while unlzma initramfs on slow cpu |
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On Tue, 29 Jan 2013 10:33:48 -0500 Don Zickus <dzickus@redhat.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.
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