netdev - Re: [PATCH] Fix oops in NFS

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Message-ID: <ZZeLAAf6qiieA5fy@casper.infradead.org>
Date: Fri, 5 Jan 2024 04:52:16 +0000
From: Matthew Wilcox <willy@...radead.org>
To: David Howells <dhowells@...hat.com>
Cc: Nathan Chancellor <nathan@...nel.org>,
	Anna Schumaker <Anna.Schumaker@...app.com>,
	Trond Myklebust <trond.myklebust@...merspace.com>,
	Jeff Layton <jlayton@...nel.org>, Steve French <smfrench@...il.com>,
	Marc Dionne <marc.dionne@...istor.com>,
	Paulo Alcantara <pc@...guebit.com>,
	Shyam Prasad N <sprasad@...rosoft.com>, Tom Talpey <tom@...pey.com>,
	Dominique Martinet <asmadeus@...ewreck.org>,
	Eric Van Hensbergen <ericvh@...nel.org>,
	Ilya Dryomov <idryomov@...il.com>,
	Christian Brauner <christian@...uner.io>, linux-cachefs@...hat.com,
	linux-afs@...ts.infradead.org, linux-cifs@...r.kernel.org,
	linux-nfs@...r.kernel.org, ceph-devel@...r.kernel.org,
	v9fs@...ts.linux.dev, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix oops in NFS

On Fri, Dec 22, 2023 at 12:00:51PM +0000, David Howells wrote:
> David Howells <dhowells@...hat.com> wrote:
> 
> > A better way, though, is to move the call to nfs_netfs_inode_init()
> > and give it a flag to say whether or not we want the facility.
> 
> Okay, I think I'll fold in the attached change.

This commit (100ccd18bb41 in linux-next 20240104) is bad for me.  After
it, running xfstests gives me first a bunch of errors along these lines:

00004 depmod: ERROR: failed to load symbols from /lib/modules/6.7.0-rc7-00037-g100ccd18bb41/kernel/fs/gfs2/gfs2.ko: Exec format error
00004 depmod: ERROR: failed to load symbols from /lib/modules/6.7.0-rc7-00037-g100ccd18bb41/kernel/fs/zonefs/zonefs.ko: Exec format error
00004 depmod: ERROR: failed to load symbols from /lib/modules/6.7.0-rc7-00037-g100ccd18bb41/kernel/security/keys/encrypted-keys/encrypted-keys.ko: Exec format error

and then later:

00016 generic/001       run fstests generic/001 at 2024-01-05 04:50:46
00017 [not run] this test requires a valid $TEST_DEV
00017 generic/002       run fstests generic/002 at 2024-01-05 04:50:46
00017 [not run] this test requires a valid $TEST_DEV
00017 generic/003       run fstests generic/003 at 2024-01-05 04:50:47
00018 [not run] this test requires a valid $SCRATCH_DEV
...

so I think that's page cache corruption of some kind.