Dmitriy Monakhov wrote:
Eric Sandeen <sandeen@xxxxxxxxxx> writes:
I've been looking at a case where many threads are opening, unlinking, and
hardlinking files on ext3 .
How many concurent threads do you use and how long does it takes to trigger
this race? I've tried to reproduce this with two threads, but not succeed.
<thread 1>
fd = create("src")
close(fd)
unlink("src")
<thread 2>
link("src", "dst")
unlink("dst")
Original testcase will be the best answer :).
Sure :) Though I didn't write it... see this collection of bash scripts:
http://people.redhat.com/esandeen/testcases/orphan-repro.tar.bz2
I didn't write it, but it exposed the bug for me. The VAR file contains
variables to specify mountpoint and a device, which the script starts by
mkfs'ing, so be warned.
It spawns -many- threads, and on my 4 CPU opteron I can hit it in a
reasonable amount of time. It would probably be nice to have a more
targeted testcase but it did the trick for me.
Thanks,
-Eric
Thanks.
-
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