On Fri, May 2, 2014 at 7:51 AM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote: > On Wed, Apr 30, 2014 at 11:15:15AM +0200, Miklos Szeredi wrote: >> IBM is triggering this with the host01 test from the LTP suite. I haven't yet >> tried to reproduce it. > > Could you repost their report? So far I hadn't managed to get actual list > corruption on mainline kernel - it definitely is possible, but on all > testcases so far the race window is too narrow. So if they have a reproducer > that doesn't take an insane amount of time, I'd really like to see it... The only reproducer they have is LTP/host01, and can trigger the bug reliably within hours. The bug is private, but I'll ask if I can repost it. The first thing is a a warning from the D_FLAG_VERIFY() in d_shrink_del() from shrink_dentry_list(). They added printks that show that the dentry has DCACHE_DENTRY_KILLED. We could ask for a dump, but this is the only rational explanation I could find for this (and a shrink list with two dentries, with racing dput on both nicely explains the case where the shrink list's prev pointer still points to the already killed dentry). Thanks, Miklos -- 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
