From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: linux-kernel@vger.kernel.org
Cc: trond.myklebust@fys.uio.no
Subject: NFS client bug
Date: Sun, 2 Sep 2001 23:20:09 +0100 (BST) [thread overview]
Message-ID: <E15dfb7-0000Vd-00@the-village.bc.nu> (raw)
During some discussion with Al Viro about the right way to do supermount he
complained that it probably wanted doing in userspace. Anyway I was actually
annoyed enough with the magicdev program to try and do this.
I have it working for a subset of working (only one device, hardcoded path)
except for what seems to be an NFS client bug.
For obvious reasons I mount with very little caching in the client.
[mount -oport=497,mountprog=200005,noac,nolock,soft
127.0.0.1:/var/cache/volumagic/cdrom /mnt/cdrom]
Everything is fine until I do
cd /mnt/cdrom/somedir
[remove CD, insert different CD]
ls
[stale NFS file handle - correct so far]
[remove CD, insert original CD]
ls
[stale NFS file handle - cached on client - wrong]
It then gets more bizarre
cd /mnt/cdrom/somedir
[Looks ok a new filehandle, works ok]
ls
[Immediate stale NFS file handle from client - no traffic]
It seems this 'dead' handle remains stuck in the system until umount.
Alan
next reply other threads:[~2001-09-02 22:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-02 22:20 Alan Cox [this message]
2001-09-02 23:17 ` Trond Myklebust
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