Messages in this thread | | | From | Nick Piggin <> | Subject | Re: sync-Regression in 2.6.28.2? | Date | Tue, 3 Feb 2009 12:09:11 +1100 |
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On Wednesday 28 January 2009 08:09:10 Federico Cuello wrote: > Ralf Hildebrandt escribió: > > I recently installed 2.6.28.2 on our postfix/dovecot-based > > mailboxserver. Previously, 2.6.28 and 2.6.28.1 have been running there > > without a hitch. > > > > Now with 2.6.28.2 I had two major lockups: All writes to the users' > > Maildirs (on ext4) would stall, the load would rise, "sync" would never > > return. > > > > I had to "reboot -f -n" to get the machine back. All hanging processes > > were unkillable, even with kill -9. > > [...] > > The same is happening to me, but I have some logs taken with sysrq. > > Here is my vmstat output: > > procs -----------memory---------- ---swap-- -----io---- -system-- > ----cpu---- > r b swpd free buff cache si so bi bo in cs us sy > id wa > 0 2 99028 46536 26356 1569400 0 0 0 0 1400 437 0 > 3 0 96 > 0 2 99028 46536 26356 1569400 0 0 0 0 1344 355 0 > 6 0 94 > 0 2 99028 46536 26356 1569400 0 0 0 0 1373 387 0 > 0 0 100 > 0 2 99028 46536 26364 1569400 0 0 0 12 1403 384 1 > 0 0 99 > 0 2 99028 46536 26364 1569400 0 0 0 0 1370 378 0 > 0 0 100 > 0 2 99028 46536 26364 1569400 0 0 0 0 1351 346 0 > 0 0 100 > 0 2 99028 46536 26364 1569400 0 0 0 0 1395 412 0 > 0 0 100 > 0 2 99028 46536 26364 1569400 0 0 0 0 1349 332 0 > 0 0 100 > 0 2 99028 46536 26368 1569400 0 0 4 0 1407 387 0 > 0 0 100 > > Notice the 100% iowait. > > I also managed to reproduce it doing a rsync from one partition to a USB > drive. After the lockup I can't read any file from the source partition, > but the other partitions can be accessed normally.
Hm, thanks for reporting, can you guys get a sysrq+W trace when the system reaches this state?
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