On Mon, 2010-09-20 at 19:58 -0700, Randy Dunlap wrote: > On Wed, September 15, 2010 10:51 am, Maciej Piechotka wrote: > > I have problems debugging system hangs (bug #15737 - > > https://bugzilla.kernel.org/show_bug.cgi?id=15737) which occur on > > kernels >=2.6.33 (LTS i.e. 2.6.32 is not affected). > > > > I cannot manage to debug them especially it actual results evolve along > > with changes in userspace (however 2.6.32 is not affected). On various > > stages: > > > > > > - Second start of composite WM would be either hard hang or will fix > > the system (i.e. problem will not be reproduced until next reboot - and > > will not be reproduced after hibernation) - recently (for 2 weeks) false - > > First start of X will result in soft hang only - true except some > > builds of 2.6.35 with relocatable kernel (???) and very old builds (2.6.33) > > - Magic SysRQ key does not work on hard hang > > - If second start of WM was successful the DRI after some time will > > report bad drawables. It is fixed by reboot - recent (for 2 weeks) - > > Switching to console and back helps (i.e. more often there is no > > hang) - possibly voodoo magic but it may help - Error messages about > > failing to pinpoint buffor (cause? side-effect?) - Running X in gdb hangs > > system (even if it is not on current VT) > > > > Soft hang: X hangs but I can switch to console. Turning off X will stop > > it but it takes some time (a minute?). There is nothing in logs (X, dmesg, > > system...) Hard hang: System is not responsive including network, X, sysrq > > etc. This is not kernel panic (caps lock and num lock does not blink). > > > > > > Someone (probably not kernel dev) suggested that it might be connected > > with removing BKL. > > > > I am really sorry for spamming but I run out of ideas how to debug this > > problem. > > > > Regards > > > Hi, > You should ask this on some other mailing list, > like linux-kernel@xxxxxxxxxxxxxxx > > Sorry. I have no idea how does this e-mail ended on linux-net mailing list. My e-mail client is surly conspiring against me ;) Sorry for mistake. Regards
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