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Date: Mon, 17 Jan 2022 09:04:16 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: NeilBrown <neilb@...e.de> Cc: Al Viro <viro@...iv.linux.org.uk>, Andrew Morton <akpm@...ux-foundation.org>, torvalds@...ux-foundation.org, Christian Brauner <christian.brauner@...ntu.com>, Anthony Iliopoulos <ailiop@...e.com>, David Howells <dhowells@...hat.com>, LKML <linux-kernel@...r.kernel.org>, linux-fsdevel@...r.kernel.org Subject: Re: [PATCH - resend] devtmpfs regression fix: reconfigure on each mount On Mon, Jan 17, 2022 at 09:03:58AM +0100, Greg Kroah-Hartman wrote: > On Mon, Jan 17, 2022 at 09:07:26AM +1100, NeilBrown wrote: > > > > Prior to Linux v5.4 devtmpfs used mount_single() which treats the given > > mount options as "remount" options, so it updates the configuration of the > > single super_block on each mount. > > Since that was changed, the mount options used for devtmpfs are ignored. > > This is a regression which affect systemd - which mounts devtmpfs > > with "-o mode=755,size=4m,nr_inodes=1m". > > > > This patch restores the "remount" effect by calling reconfigure_single() > > > > Fixes: d401727ea0d7 ("devtmpfs: don't mix {ramfs,shmem}_fill_super() with mount_single()") > > Acked-by: Christian Brauner <christian.brauner@...ntu.com> > > Signed-off-by: NeilBrown <neilb@...e.de> > > --- > > drivers/base/devtmpfs.c | 7 +++++++ > > fs/super.c | 4 ++-- > > include/linux/fs_context.h | 2 ++ > > 3 files changed, 11 insertions(+), 2 deletions(-) > > Sorry, I thought Al was going to take this as the regression came from > his tree, I should have picked it up earlier. I'll queue it up after > 5.17-rc1 is out. Ah, nevermind, Linus just took it. thanks, greg k-h
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