From: Matt Helsley <matthltc@us.ibm.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Helsley <matthltc@us.ibm.com>,
Alexey Dobriyan <adobriyan@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
xemul@parallels.com, containers@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, dave@linux.vnet.ibm.com,
mingo@elte.hu, linux-fsdevel@vger.kernel.org,
Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH 1/9] exec_path 1/9: introduce ->exec_path and switch /proc/*/exe
Date: Thu, 4 Jun 2009 14:30:33 -0700 [thread overview]
Message-ID: <20090604213033.GZ9285@us.ibm.com> (raw)
In-Reply-To: <alpine.LFD.2.01.0906040803410.4880@localhost.localdomain>
On Thu, Jun 04, 2009 at 08:07:23AM -0700, Linus Torvalds wrote:
>
>
> On Thu, 4 Jun 2009, Matt Helsley wrote:
> >
> > Doesn't this pin the vfs mount of the executable for the lifetime of
> > the task?
>
> Well, yes, but so does the current code.
Not quite. The current code pins it as long as the corresponding VMAs
are mapped -- not for the lifetime of the task.
> Sure, in _theory_ it can be a non-mmap executable (maybe people still have
> those old OMAGIC a.out executables), and in _theory_ you could unmap the
> executable even if it was originally mmap'ed, but neither of those is
> exactly common, are they?
Not common to my knowledge, no.
>
> So in practice, nothing has changed wrt lifetime of the executable.
Almost all of the time, yes.
Cheers,
-Matt Helsley
next prev parent reply other threads:[~2009-06-04 21:32 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-26 11:36 [PATCH 14/38] Remove struct mm_struct::exe_file et al Matt Helsley
2009-05-26 23:24 ` Andrew Morton
[not found] ` <20090526162415.fb9cefef.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2009-05-31 21:54 ` Alexey Dobriyan
2009-05-31 21:54 ` Alexey Dobriyan
[not found] ` <20090531215427.GA29534-2ev+ksY9ol182hYKe6nXyg@public.gmane.org>
2009-05-31 22:19 ` Andrew Morton
2009-05-31 22:19 ` Andrew Morton
[not found] ` <20090531151953.8f8b14b5.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2009-05-31 23:15 ` Linus Torvalds
2009-05-31 23:15 ` Linus Torvalds
[not found] ` <alpine.LFD.2.01.0905311613260.3435-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2009-05-31 23:50 ` Andrew Morton
2009-05-31 23:50 ` Andrew Morton
[not found] ` <20090531165026.376a914c.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2009-06-01 0:02 ` Linus Torvalds
2009-06-01 0:02 ` Linus Torvalds
2009-06-03 23:04 ` [PATCH 1/9] exec_path 1/9: introduce ->exec_path and switch /proc/*/exe Alexey Dobriyan
2009-06-03 23:04 ` Alexey Dobriyan
2009-06-03 23:05 ` [PATCH 2/9] exec_path 2/9: switch audit to ->exec_path Alexey Dobriyan
2009-06-03 23:06 ` [PATCH 5/9] exec_path 5/9: make struct spu_context::owner task_struct Alexey Dobriyan
[not found] ` <20090603230422.GB853-2ev+ksY9ol182hYKe6nXyg@public.gmane.org>
2009-06-03 23:05 ` [PATCH 2/9] exec_path 2/9: switch audit to ->exec_path Alexey Dobriyan
2009-06-03 23:05 ` [PATCH 3/9] exec_path 3/9: switch TOMOYO " Alexey Dobriyan
2009-06-03 23:05 ` Alexey Dobriyan
2009-06-03 23:06 ` [PATCH 4/9] exec_path 4/9: switch oprofile " Alexey Dobriyan
2009-06-03 23:06 ` Alexey Dobriyan
2009-06-03 23:06 ` [PATCH 5/9] exec_path 5/9: make struct spu_context::owner task_struct Alexey Dobriyan
2009-06-03 23:06 ` [PATCH 6/9] exec_path 6/9: add struct spu::tsk Alexey Dobriyan
2009-06-03 23:06 ` Alexey Dobriyan
2009-06-03 23:07 ` [PATCH 7/9] exec_path 7/9: switch cell SPU thing to ->exec_path Alexey Dobriyan
2009-06-03 23:07 ` [PATCH 8/9] exec_path 8/9: remove ->exe_file et al Alexey Dobriyan
2009-06-03 23:08 ` [PATCH 9/9] exec_path 9/9: remove VM_EXECUTABLE Alexey Dobriyan
2009-06-03 23:36 ` [PATCH 1/9] exec_path 1/9: introduce ->exec_path and switch /proc/*/exe Linus Torvalds
2009-06-04 7:55 ` Matt Helsley
2009-06-05 10:45 ` Christoph Hellwig
2009-06-06 7:22 ` Al Viro
2009-06-03 23:07 ` [PATCH 7/9] exec_path 7/9: switch cell SPU thing to ->exec_path Alexey Dobriyan
2009-06-03 23:07 ` [PATCH 8/9] exec_path 8/9: remove ->exe_file et al Alexey Dobriyan
2009-06-03 23:08 ` [PATCH 9/9] exec_path 9/9: remove VM_EXECUTABLE Alexey Dobriyan
[not found] ` <20090603230810.GJ853-2ev+ksY9ol182hYKe6nXyg@public.gmane.org>
2009-06-04 7:24 ` Matt Helsley
2009-06-04 7:24 ` Matt Helsley
2009-06-03 23:36 ` [PATCH 1/9] exec_path 1/9: introduce ->exec_path and switch /proc/*/exe Linus Torvalds
2009-06-04 7:55 ` Matt Helsley
2009-06-04 8:10 ` Matt Helsley
2009-06-04 15:07 ` Linus Torvalds
2009-06-04 21:30 ` Matt Helsley [this message]
2009-06-04 22:42 ` Alexey Dobriyan
2009-06-05 3:49 ` Matt Helsley
[not found] ` <20090604224239.GA10666-2ev+ksY9ol182hYKe6nXyg@public.gmane.org>
2009-06-05 3:49 ` Matt Helsley
[not found] ` <20090604213033.GZ9285-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-06-04 22:42 ` Alexey Dobriyan
[not found] ` <alpine.LFD.2.01.0906040803410.4880-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2009-06-04 21:30 ` Matt Helsley
[not found] ` <20090604075532.GU9285-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-06-04 8:10 ` Matt Helsley
2009-06-04 15:07 ` Linus Torvalds
2009-06-05 10:45 ` Christoph Hellwig
2009-06-05 15:10 ` Linus Torvalds
2009-06-05 15:41 ` Alexey Dobriyan
2009-06-05 15:49 ` Linus Torvalds
[not found] ` <alpine.LFD.2.01.0906050848520.6847-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2009-06-05 16:09 ` Alexey Dobriyan
2009-06-05 16:09 ` Alexey Dobriyan
[not found] ` <20090605160943.GA5262-2ev+ksY9ol182hYKe6nXyg@public.gmane.org>
2009-06-05 16:48 ` Linus Torvalds
2009-06-05 16:48 ` Linus Torvalds
[not found] ` <alpine.LFD.2.01.0906050942450.6847-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2009-06-05 17:46 ` Alexey Dobriyan
2009-06-05 17:46 ` Alexey Dobriyan
[not found] ` <20090605154147.GA16766-2ev+ksY9ol182hYKe6nXyg@public.gmane.org>
2009-06-05 15:49 ` Linus Torvalds
[not found] ` <alpine.LFD.2.01.0906050808551.6847-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2009-06-05 15:41 ` Alexey Dobriyan
[not found] ` <20090605104517.GA11713-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2009-06-05 15:10 ` Linus Torvalds
2009-06-06 7:22 ` Al Viro
[not found] ` <20090606072244.GA13497-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2009-06-15 22:10 ` Alexey Dobriyan
2009-06-15 22:10 ` Alexey Dobriyan
2009-06-01 17:30 ` [PATCH 14/38] Remove struct mm_struct::exe_file et al Matt Helsley
2009-06-01 17:30 ` Matt Helsley
[not found] ` <20090526113618.GJ28083-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-05-26 23:24 ` Andrew Morton
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