László KÁROLYI wrote:
Hello,
Recently I updated my RELENG_8 to RELENG_9. Since then, the server hangs
from time to time for 5 minutes. When I run a top in a remote terminal,
I can see that it hangs so strong, that the clock hangs too. When it
continues to run , the time continues from the when it 'hanged'. TCP
connections are also dropped with timeout at that time. However, no
kernel panic, and i can't see anything in the dmesg log too.
Obtaining kernel dump is the way to go. You can occasionally find that
obtaining dump on world built with clang is much easier than on
gcc-compiled one. I remember at least one such case with broken zfs
directory when trying to read such directory result in process with no
state on gcc-compiled world and result in imminent panic in zfs code on
clang-compiled world. Remember to set dumpdev to something appropriate.
/boot/loader.conf:
zfs_load="YES"
vfs.root.mountfrom="zfs:pool/root"
vfs.zfs.vdev.max_pending="8"
geom_raid_load="YES"
hint.siisch.0.sata_rev=1
hint.siisch.1.sata_rev=1
/etc/sysctl.conf:
vfs.zfs.l2arc_noprefetch=0
This has impact on performance. You sure you really need that one? Can
you try without it?
/etc/make.conf, the kernel was compiled with this settings:
CPUTYPE?=athlon64
Compiling with clang you better turn that thing off.
--
Sphinx of black quartz judge my vow.
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