Kernel Crash when copying large files over NFS
From Linux NFS
Revision as of 15:42, 22 October 2010 by Amschuma
- Kernel version: 184.108.40.206, 220.127.116.11, 18.104.22.168
- Bug 16056
- Reported by: Philippe Dax (June 15, 2010)
- Fixed by: Trond Myklebust (June 16, 2010)
- Arch: amd64
- NFS v3 client.
- Copy large file to an NFS-mounted filesystem.
- larger than the amount of available physical memory
- swapper and rpciod on the client complain about page allocation failures.
- kswapd goes into a deadlock, resulting in a system-wide crash.
- Crash on UDP and TCP mounts
- This problem was fixed by commit b608b283a962caaa280756bc8563016a71712acf
commit b608b283a962caaa280756bc8563016a71712acf Author: Trond Myklebust <Trond.Myklebust@netapp.com> Date: Fri Jul 30 15:31:54 2010 -0400 NFS: kswapd must not block in nfs_release_page See https://bugzilla.kernel.org/show_bug.cgi?id=16056 If other processes are blocked waiting for kswapd to free up some memory so that they can make progress, then we cannot allow kswapd to block on those processes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: email@example.com