Hi,
I've discovered a strange thing lately. My memory is being sucked out
when doing (I suppose) _a lot_ of stat() on the file system. I got left
once with ~30MB of ram (of 512 in total) which made my system trash
like hell. You might try doing the following to reproduce the effect:
$ echo 1 > /proc/sys/vm/drop_caches
$ vmstat # write down the result
$ du -s -x /lots/of/files # keep it running for a minute
$ echo 1 > /proc/sys/vm/drop_caches
$ vmstat # write it down too
The latter vmstat should report less memory then the previous one.
(sum up free+buff+cache) Is this an expected behaviour ? If yes,
please explain.
The memory can be magically freed by umount-ing the partition that was
scanned or by deleting the files that were stat()-ed. However, one
cannot simply umount "/".
Note: Make sure you point 'du' to a place where you have dozens of
files, so it can keep it running for a minute or more.
I can confirm that to be an issue to 2.6.23-rc6 and 2.6.23-rc7.
A friend of mine reports that 2.6.22.5 produces same results.
Tested on jfs and ext3.
Regards,
Michał Kazior.
PS. I'm not subscribed to the list, so CC me please.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
