On Tue, 3 May 2011 at 10:51, Dave Chinner wrote:
> Can you run an event trace of all the XFS events during a find for
> me? Don't do it over the entire subset of the filesystem - only
> 100,000 inodes is sufficient (i.e. kill the find once the xfs inode
> cache slab reaches 100k inodes. While still running the event trace,
> can you then drop the caches (echo 3 > /proc/sys/vm/drop_caches) and
> check that the xfs inode cache is emptied? If it isn't emptied, drop
> caches again to see if that empties it. If you coul dthen post the
> event trace, I might be able to see what is going strange with the
> shrinker and/or reclaim.
OK, I've done something. Not sure if I got everything right:
(new URL, the other one ran out of webspace. Omit the s in https
if you don't have the CAcert.org root cert imported)
* I've started 'trace-cmd record -e xfs /usr/bin/find /mnt/backup'
in one (screen-)window, which produced trace-14.dat.bz2
* I've started my oom-debug.sh script in another, which produced
* In another window, I was dropping the caches and looked at
/proc/slabinfo again, see drop_caches-14.txt
Somehow "trace-cmd report" segfaults here, but I hope "trace-14.report"
contains enough details already. If not, I can do this again.
BOFH excuse #314:
You need to upgrade your VESA local bus to a MasterCard local bus.