tags 695872 + upstream patch unreproducible quit Hi Tom,
Tom Downes wrote: > While running a shell script that looped over a couple hundred > filesystems accessed via automoutning NFS exports (unmounted prior > to running the script), there was a kernel panic that prevented > further automounts from occurring. Thanks for reporting. > This problem seems very similar to bug #691764 filed under the > autofs package but I believe the bug is really in the sunrpc module. In that report the panic is in different code, so I think they are distinct. > I've found a patch described here, applied it to my system and have > not experienced a crash since. I only ever experienced one crash, > however, and unpatched systems are yet to crash. For reference: v2.6.38-rc1~407^2~38 kernel panic when mount NFSv4, 2010-12-20 Trond explains: | The panic place is: | rpc_mkpipe | __rpc_lookup_create() <=== find pipefile *idmap* | __rpc_mkpipe() <=== pipefile is *idmap* | __rpc_create_common() | ****** BUG_ON(!d_unhashed(dentry)); ****** *panic* | | The test is wrong: we can find ourselves with a hashed negative dentry here | if the idmapper tried to look up the file before we got round to creating | it. It seems like a match and I think you're right that the patch would fix it. Thanks for finding it. Hope that helps, Jonathan -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20121213193403.GA24202@elie.Belkin
