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List:       gfs-users
Subject:    [gfs-users] GFS on PC with memory more as 1G
From:       Alexandre Makliaev <amakliaev () dock23 ! de>
Date:       2001-11-06 15:52:07
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Hi!

I still try to implement GFS on our WebCluster and at this point

I have one problem:

I use GFS4.2 (fresh 2.4.9 kernel) on IBM Netfinity Servers x330
(2 Intel PIII CPU, 2G RAM, QLogic2200) with 'CONFIG_HIGHMEM4G=y'
(in kernel config) and apache daemon on each server write to the same log
file (f.e. access.log) on GFS partition.

When I try to rotate logs from apache I do
# mv access.log access.log.old
and then
# apache reload
on one or both PCs, in parallel or one after another

I get kernel panic:

Nov  5 14:23:21 wb1 kernel: Unable to handle kernel NULL pointer dereference at \
                virtual address 000001db
Nov  5 14:23:21 wb1 kernel:  printing eip:
Nov  5 14:23:21 wb1 kernel: c01eabed
Nov  5 14:23:21 wb1 kernel: *pde = 00000000
Nov  5 14:23:21 wb1 kernel: Oops: 0002
Nov  5 14:23:21 wb1 kernel: CPU:    1
Nov  5 14:23:21 wb1 kernel: EIP:    0010:[Letext+2766/6125]
Nov  5 14:23:21 wb1 kernel: EFLAGS: 00010246
Nov  5 14:23:21 wb1 kernel: eax: 00000000   ebx: c31495a8   ecx: 0000005f   edx: \
                c31495a8
Nov  5 14:23:21 wb1 kernel: esi: 080fd6ac   edi: 000001db   ebp: 0000023a   esp: \
                f5655e68
Nov  5 14:23:21 wb1 kernel: ds: 0018   es: 0018   ss: 0018
Nov  5 14:23:21 wb1 kernel: Process httpd (pid: 17578, stackpage=f5655000)
Nov  5 14:23:21 wb1 kernel: Stack: 00000003 0000005f 00000000 f70fe400 f70fe564 \
                0000000a 000001db 0000005f
Nov  5 14:23:21 wb1 kernel:        00000000 00000000 c31495a8 000001db 00000000 \
                f70e034c f70e02a0 00000000
Nov  5 14:23:21 wb1 kernel:        0a00000a f887ef2f f72468c0 080fd6ac 0000005f \
                f72468e0 f72468c0 0000005f
Nov  5 14:23:21 wb1 kernel: Call Trace: \
                [gfs:__insmod_gfs_S.text_L160096+11983/161952] \
                [gfs:__insmod_gfs_S.text_L16009
Nov  5 14:23:21 wb1 kernel:    [gfs:__insmod_gfs_S.text_L160096+11696/161952] \
                [sys_write+143/196] [system_call+51/56]
Nov  5 14:23:21 wb1 kernel:
Nov  5 14:23:21 wb1 kernel: Code: f3 aa 58 59 e9 d6 d4 f3 ff b8 f2 ff ff ff 30 d2 e9 \
                c4 60 f4
Nov  5 14:23:23 mpc1 kernel: memexp:  asking for lock (4, 2416) action 3 from 5
Nov  5 14:23:23 mpc1 kernel: memexp:  asking for lock (4, 2416) action 3 from 5
Nov  5 14:23:24 wb2 kernel: memexp:  asking for lock (5, 136) action 1 from 4
Nov  5 14:23:24 mpc1 kernel: memexp:  asking for lock (4, 2416) action 3 from 5
...

If I use kenel with CONFIG_NOHIGHMEM=y
then I have not problems.

In maillists have I seen http://bugzilla.sistina.com/show_bug.cgi?id=265
similer error, but provided patch can't be used with GFS4.2

Any ideas?

-- 
Alexandre Makliaev | Systemadministrator
Dock 23 - Bauer Internet Company GmbH
Süderstraße 77/79a | 20077 Hamburg
Phone +49 40 3019 5592 | Fax +49 40 3019 5610
mailto:amakliaev@dock23.de



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