From: Zan Lynx <zlynx-HInyCGIudOg@public.gmane.org>
To: Cyrill Gorcunov <gorcunov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Pavel Emelyanov <xemul-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
James Bottomley
<jbottomley-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>,
containers-qjLDD68F18O7TbgM5vRIOg@public.gmane.org,
Nathan Lynch <ntl-e+AXbWqSrlAAvxtiuMwx3w@public.gmane.org>,
Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
LINUXFS-ML
<linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Daniel Lezcano <dlezcano-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Subject: Re: [RFC] fs, proc: Introduce the /proc/<pid>/map_files/ directory v2
Date: Wed, 24 Aug 2011 09:05:21 -0600 [thread overview]
Message-ID: <4E551331.1010709@acm.org> (raw)
In-Reply-To: <20110824085329.GL29452@sun>
On 8/24/2011 2:53 AM, Cyrill Gorcunov wrote:
> From: Pavel Emelyanov <xemul-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
>
> This one behaves similarly to the /proc/<pid>/fd/ one - it contains symlinks
> one for each mapping with file, the name of a symlink is vma->vm_start, the
> target is the file. Opening a symlink results in a file that point exactly
> to the same inode as them vma's one.
>
> This thing is aimed to help checkpointing processes.
>
> For example the ls -l of some arbitrary /proc/<pid>/map_files/
>
> | lr-x------ 1 cyrill cyrill 64 Aug 9 15:25 0x3d73a00000 -> /lib64/ld-2.5.so
[snip]
Just curious: How do these symlinks work when the process reading a
/proc file is in a chroot or a different namespace?
For example, a chroot environment might have independent copies of
/lib64/ld-2.5.so and a bind mount of /proc. Does the symlink then point
to the wrong file?
next prev parent reply other threads:[~2011-08-24 15:05 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-24 8:53 [RFC] fs, proc: Introduce the /proc/<pid>/map_files/ directory v2 Cyrill Gorcunov
2011-08-24 9:21 ` Pekka Enberg
2011-08-24 9:33 ` Pavel Emelyanov
2011-08-24 9:34 ` Tejun Heo
2011-08-24 9:37 ` Cyrill Gorcunov
2011-08-24 9:41 ` Cyrill Gorcunov
2011-08-24 11:18 ` Vasiliy Kulikov
2011-08-24 11:31 ` Cyrill Gorcunov
2011-08-25 8:29 ` Cyrill Gorcunov
2011-08-25 17:01 ` Tejun Heo
2011-08-25 17:05 ` Pavel Emelyanov
2011-08-25 17:21 ` Cyrill Gorcunov
2011-08-25 17:25 ` Pavel Emelyanov
2011-08-25 17:27 ` Tejun Heo
2011-08-25 17:34 ` Cyrill Gorcunov
2011-08-25 17:07 ` Cyrill Gorcunov
2011-08-25 20:54 ` Tejun Heo
2011-08-25 21:12 ` Tejun Heo
2011-08-25 21:34 ` Cyrill Gorcunov
2011-08-25 21:39 ` Tejun Heo
2011-08-26 6:58 ` Cyrill Gorcunov
2011-08-26 11:29 ` Cyrill Gorcunov
2011-08-26 12:28 ` Kirill A. Shutemov
2011-08-26 12:39 ` Cyrill Gorcunov
2011-08-26 13:16 ` Cyrill Gorcunov
2011-08-26 14:06 ` Tejun Heo
2011-08-26 14:23 ` Kirill A. Shutemov
2011-08-26 14:27 ` Tejun Heo
2011-08-25 17:11 ` Cyrill Gorcunov
2011-08-25 17:36 ` Vasiliy Kulikov
2011-08-25 17:39 ` Cyrill Gorcunov
2011-08-25 17:54 ` Vasiliy Kulikov
2011-08-25 18:13 ` Cyrill Gorcunov
2011-08-24 15:05 ` Zan Lynx [this message]
2011-08-24 15:19 ` Pavel Emelyanov
2011-08-24 17:36 ` Andi Kleen
2011-08-25 6:42 ` Pavel Emelyanov
2011-08-25 14:04 ` Andi Kleen
2011-08-25 14:30 ` Cyrill Gorcunov
2011-08-25 14:47 ` Pavel Emelyanov
2011-08-24 15:22 ` Cyrill Gorcunov
2011-09-13 14:14 ` Pavel Machek
2011-09-13 14:20 ` Pavel Emelyanov
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