Messages in this thread | | | Date | Sat, 17 May 2008 11:41:20 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: XFS/md/blkdev warning (was Re: Linux 2.6.26-rc2) |
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On Sat, 17 May 2008, Linus Torvalds wrote: > > Do this on the console (and having a serial console or working netconsole > is a wonderful thing to log it, because otherwise it will generally just > scroll off the screen), and trigger SysRQ-w. That dumps all blocked tasks > to the screen.
Another thing to try is to enable lock debugging, and have
CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_MUTEXES=y CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_PROVE_LOCKING=y CONFIG_LOCKDEP=y CONFIG_DEBUG_LOCKDEP=y
in your kernel .config file. It has performance implications, of course, but it can help debug incorrect locking much more quickly.
Linus
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