[ Reply-to set to linux-ext4@xxxxxxxxxxxxxxx ] On Tue, Sep 30, 2008 at 10:27:29PM +0200, Quentin Godfroy wrote: > Hi lists, > I'd like to report the following problem : after ~ 10 days' uptime on a > Debian 2.6.26-1-686 kernel, my system becomes extremely sluggish and > unresponsive and the OOM-killer starts targeting even innocent processes like > identd or rsync (when the swap is disabled). The machine is low on RAM (192 > MB) but this has never been a problem before. As for the slowness, strace > shows that the brk() syscall takes ages to complete; the blocking processes > are in the D state (and for some reason the kernel gives no wchan info). > > Config has nothing unusual except that all fs are ext4, which I am begining > to suspect may be the culprit, as every night some process stat()s and > read()s something like 850,000 files, which is maybe fs-stressing; also, > umounting then remounting /home makes the 'buffers' drop from 127304 to > 55920 and partially solves the problem. > > Free reports a large and constantly growing 'buffers' figure (more than > 50% of the available memory). No userland processes seems to be consuming > lare amounts of memory (sum of RSS in 'ps aux' is about 30 megs), and the > overall system is mostly idle. > > for instance, the following command reports > > $ free ; dpkg -l '*' >/dev/null; dmesg | tail -n 2 > total used free shared buffers cached > Mem: 190356 178920 11436 0 126104 12520 > -/+ buffers/cache: 40296 150060 > Swap: 0 0 0 > /* Waits a minute or so */ > Killed > [811245.911859] Out of memory: kill process 6639 (dpkg-query) score 7292 or a child > [811245.911972] Killed process 6639 (dpkg-query) > Can you send the output of /proc/meminfo and /proc/slabinfo? - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
