On Fri, 3 Dec 2010, Michael Leun wrote: > On Thu, 2 Dec 2010 11:57:22 +0100 > Michael Leun <lkml20101129@xxxxxxxxxxxxxxx> wrote: > > > > Can you please describe in detail the workload that's causing this > > > to happen? > > > > Thats rather complicated, but I'll try. Basically it boils down to: > > > > unshare -n -m /bin/bash > > unionfs -o > > cow,suid,allow_other,max_files=65536 /home/netenv/user1-union=RW:/=RO /home/netenv/user1 > > mount -n -t proc none /home/netenv/user1/proc mount -n -t sysfs > > none /home/netenv/user1/sys mount -n -t devtmpfs > > devtmpfs /home/netenv/user1/dev mount -n -t devpts > > devpts /home/netenv/user1/dev/pts chroot /home/netenv/user1 /bin/su - > > user1 > [...] > > In some of this setups two or more environments share the same > > writable branch, so the files in this environments changed against > > real root of the machine are the same, e.g.: > > > > [...] > > unionfs -o > > cow,suid,allow_other,max_files=65536 /home/netenv/commondir=RW:/=RO /home/netenv/user1 > > [...] > > > > and another one > > > > [...] > > unionfs -o > > cow,suid,allow_other,max_files=65536 /home/netenv/commondir=RW:/=RO /home/netenv/user2 > > [...] > > Additional note: Happens also WITHOUT that "two unionfs mounts use the > same branch dir" stuff. Thanks. For you the workaround would be to use the "kernel_cache" option which disables cache invalidation on open. I'll try to reproduce the BUG on my machine, and if I don't succeed I'll need som more help from you. Also could you please send me your kernel .config > > Really seems to happen much more often in 2.6.36.1 than in 2.6.36. Probably just coincidence. Sometimes the frequency a bug shows up depends on code layout (and hence cache layout) differences, which can vary from compile to compile and even from one boot to the next. Thanks, Miklos -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>