Messages in this thread | | | Subject | Re: 2.6.37-next - kernel BUG at fs/dcache.c:1363 | From | Valdis.Kletnieks@vt ... | Date | Fri, 07 Jan 2011 12:10:40 -0500 |
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On Fri, 07 Jan 2011 00:12:09 +1100, Nick Piggin said:
> > Thanks. It actually passed in a dentry that appears to have already been > > used for something. This is not exactly a nice thing for a filesystem to do > > and probably indicates an underlying bug anyway (or at least something > > the vfs doesn't guarantee the safety of). > > > > Taking a look now. > > This patch fixes it here
> config fs: avoid switching ->d_op on live dentry
> Switching d_op on a live dentry is racy in general, so avoid it. In this case > it is a negative dentry, which is safer, but there are still concurrent ops > which may be called on d_op in that case (eg. d_revalidate). So in general > a filesystem may not do this. Fix configfs so as not to do this.
Confirming this patch fixes the crash I was seeing, so now I'm off to try to finish bisecting my way through the other issue I was seeing... [unhandled content-type:application/pgp-signature] | |