On Mon, 2011-09-19 at 02:44 +0200, Maciej Marcin Piechotka wrote: > On Tue, 2011-08-30 at 14:27 +0800, Miao Xie wrote: > > > > > > Unfortunately it results in freeze of system and I cannot give more > > > details. Sometimes it happens not from fcron but then it does not result > > > in freeze (???). > > > > Could you give me the method to reproduce it? > > > > Thanks > > Miao > > Sorry for spamming in this thread but I'm trying to post my findings in > hope that somebody will understand what's going on. > > Recent crash gave some valuable information IMHO: > > 1. I started the autocompletion of path in zsh > 2. At some point the zsh hanged. In ps the process was listed as > runnable > 3. Any access to root volume (the one that zsh was trying to readdir) > finished in hang. > 4. I was able to access the child volume (/home) > 5. After some time the bug is hit. At this time strange things happens > (screen freeze etc.). I guess that there is some strange interaction > between KMS, X and now-hanged composite manager > > Next time it happend (also during listing root directory of volume 0) I > observed the following thing - I can log out and unmount home but the > volume 0 remains busy and cannot be unmounted. > > Things to consider: > > - It is not enabled/disabled by any mount option > - Is it triggered when the parent volume (say volume 0) and child > volume are both mounted? I cannot reproduce it when the parent volume is not mounted (snapshots are to subvolume) > - Which case is it failing (I've tried to add printk but I cannot find > the option in printk to print u64) > - Why it happens only during night? > > Regards Regards
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