10-STABLE hangups frequently

[Henri Hennebert]

On 02/03/2016 02:03, Hajimu UMEMOTO wrote:
> Hi,
> 
>>>>>> On Wed, 3 Feb 2016 07:07:38 +1100
>>>>>> Peter Jeremy <peter at rulingia.com> said:
> 
> peter> As others have said, you need to provide lots more detail on your
> peter> configuration.
> 
> CPU: AMD Athlon(tm) 64 Processor 3500+
> Memory: 4GB
> HDD: 3TB
> 
> I'm using ZFS only setup.
> 
> peter> There were no problems at r290231 but after I upgraded to r295005, I
> peter> started seeing "out of swap" errors and hangs during the periodic
> peter> daily runs.  I'm not seeing this on 1GB instances - though they are
> peter> all running UFS.
> 
> r292875 runs well:
> 
> FreeBSD asuka.mahoroba.org 10.2-STABLEFreeBSD 10.2-STABLE #5 r292875: Tue Feb  2 07:08:29 JST 2016 root at asuka.mahoroba.org:/usr/obj/usr/src/sys/ASUKA  amd6
> 
> r292895 hangs:
> 
> FreeBSD asuka.mahoroba.org 10.2-STABLE FreeBSD 10.2-STABLE #6 r292895: Tue Feb  2 10:17:28 JST 2016 root at asuka.mahoroba.org:/usr/obj/usr/src/sys/ASUKA  amd64
> 
> I tried latest stable (r295137) with the sys/kern/vfs_subr.c part of
> r292895 reverted, and it seems running well, here:
> 
> FreeBSD asuka.mahoroba.org 10.3-PRERELEASE FreeBSD 10.3-PRERELEASE #0 r295137M: Tue Feb  2 20:39:11 JST 2016     root at asuka.mahoroba.org:/usr/obj/usr/src/sys/ASUKA  amd64
> 
> peter> Some experimentation suggested that just "find /" was enough to wedge
> peter> my system.  I did some experimenting and found that the following
> peter> loader config was enough to prevent it hanging:
> peter> vfs.zfs.arc_max="128M"
> peter> vfs.zfs.arc_meta_limit="50M"
> peter> vfs.zfs.arc_min="25M"
> peter> (previously, I had no ZFS tuning at all).
> 
> I had ZFS tuning before.  However, after this problem was occur, I
> removed all of ZFS tuning.
> The FS related setting is only kern.maxvnodes=400000, now.
> 
> Sincerely,
> 
> --
> Hajimu UMEMOTO
> ume at mahoroba.org  ume at FreeBSD.org
> http://www.mahoroba.org/~ume/

I encounter a hangup 3 times after I upgrade to
10.3-PRERELEASE r295247M in a zfs configuration (i386 with 2GB memory)
while trying to run  security/tripwire (compute checksum on all the files).

With /usr/src/sys/kern/vfs_subr.c at revision 291757 all return to normal.

Henri

PS thanks Hajimu