Messages in this thread | | | Date | Wed, 19 Mar 2014 16:22:25 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] proc: show mnt_id in fdinfo files |
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On Mon, 17 Mar 2014 15:50:13 +0400 Cyrill Gorcunov <gorcunov@gmail.com> wrote:
> On Mon, Mar 17, 2014 at 03:30:26PM +0400, Pavel Emelyanov wrote: > > On 03/17/2014 02:39 PM, Andrey Vagin wrote: > > > Currently we don't have a way how to determing from which mount point > > > file has been opened. This information is required for proper dumping > > > and restoring file descriptos due to presence of mount namespaces. It's > > > possible, that two file descriptors are opened using the same paths, but > > > one fd references mount point from one namespace while the other fd -- > > > from other namespace. > > > > > > Cc: Al Viro <viro@zeniv.linux.org.uk> > > > Cc: Oleg Nesterov <oleg@redhat.com> > > > Cc: Andrew Morton <akpm@linux-foundation.org> > > > Cc: Cyrill Gorcunov <gorcunov@openvz.org> > > > Cc: Pavel Emelyanov <xemul@parallels.com> > > > Signed-off-by: Andrey Vagin <avagin@openvz.org> > > > > These IDs are already shown in the /proc/$pid/mountinfo, and for some FSs > > can be obtained via path_to_handle_at(), so this patch just makes it work > > for any FS and speeds things up. > > > > Acked-by: Pavel Emelyanov <xemul@parallels.com> > > I think Documentation/filesystems/proc.txt should be updated on top.
Yes please.
It would be nice to see example output in the changelog as well please.
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