Messages in this thread | | | Date | Tue, 27 Jan 2009 19:09:10 -0200 | From | Federico Cuello <> | Subject | Re: sync-Regression in 2.6.28.2? |
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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.
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