[OpenAFS] linux kernel error: afs_get_hash_stats

Ben Poliakoff benp@reed.edu
Wed, 19 Nov 2008 16:27:57 -0800

Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

A debian linux web server that I maintain has started to log many
thousands of the following error every day:

    afs_get_hash_stats: Warning! exceeded max bucket len 36

=2E..approaching 100,000/day actually.

In the last couple of days I started seeing a more interesting kernel
error on this box.  I'm uncertain whether the issue is hardware or
software related, but the openafs module is featured prominently in the
"Call Trace":

    afs_get_hash_stats: Warning! exceeded max bucket len 39
    afs_get_hash_stats: Warning! exceeded max bucket len 41
    BUG: soft lockup detected on CPU#1!

    Call Trace:
     <IRQ> [<ffffffff802a3673>] softlockup_tick+0xdb/0xed
     [<ffffffff802878d5>] update_process_times+0x42/0x68
     [<ffffffff8026c2b5>] smp_local_timer_interrupt+0x23/0x47
     [<ffffffff8026c9a9>] smp_apic_timer_interrupt+0x41/0x47
     [<ffffffff8025874a>] apic_timer_interrupt+0x66/0x6c
     <EOI> [<ffffffff802811f3>] vprintk+0x29e/0x2ea
     [<ffffffff88269ec0>] :openafs:hash_bucket_stat+0x0/0x60

See http://pastebin.com/m397eccb for the full call trace (including
several more .

kernel is 2.6.18-6-amd64
openafs client version is 1.4.2-6etch1 (it's a debian box)

Does this ring any bells for anyone?


PGP fingerprint:      A131 F813 7A0F C5B7 E74D  C972 9118 A94D 6AF5 2019

Content-Type: application/pgp-signature
Content-Disposition: inline

Version: GnuPG v1.4.6 (GNU/Linux)