Dipankar Sarma wrote:

On Wed, Oct 16, 2002 at 08:59:08PM +0200, Henrik Storner wrote:

quoted

well you hit the nail right on the head there.

I've just been running the 2.5.42-mm2 kernel except for the dcache_rcu
patch for a full hour, and I was unable to reproduce the hangs that I
saw with the full -mm2 patch installed. Did two full kernel builds
while reading some mail and doing other stuff - no problems what so
ever.

Just to be sure, I re-applied the dcache_rcu patch, rebuilt the
kernel, booted with the kernel containing dcache_rcu patch,
and the system died within a few minutes.

So it is definitely something in the dcache_rcu patch that does it.

Well, I am not quite sure of this yet. Maneesh pointed out this earlier -
In this machine with 2.5.42-mm2 and no dcache_rcu, (with your .config),
we see  this -

[root@llm04 dbench]# df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/sda6              1004024    461168    491852  49% /
/dev/sda1               505605     38348    441153   8% /boot
/dev/sda5              2514172   1791560    594900  76% /usr
none                    257532         0    257532   0% /dev/shm
/dev/sdb5              6324896     23996   5979604   1% /mnt/sdb5
llm04:/mnt/sdb5        6324896     23968   5979616   1% /mnt/sdc1
/dev/sda2              9068648   3993040   4614948  47% /home
[root@llm04 dbench]# pwd
/mnt/sdc1/dbench
root@llm04 dbench]# ./dbench 4
4 clients started
..........................................................................................................................................rmdir CLIENTS/CLIENT2/~DMTMP/WORDPRO failed (Directory not empty)
rmdir CLIENTS/CLIENT2/~DMTMP/PARADOX failed (Directory not empty)

Is this dbench-on-NFS?  That has always failed - it's to do
with the funny NFS handling of unlinked-while-open files.
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