* Re: max arguments for exec
@ 2001-09-27 15:48 Carl Spalletta
2001-09-27 16:53 ` Kiril Vidimce
0 siblings, 1 reply; 6+ messages in thread
From: Carl Spalletta @ 2001-09-27 15:48 UTC (permalink / raw)
To: vkire; +Cc: linux-kernel
On Wed, 26 Sep 2001, Kiril Vidimce wrote:
> Yeah, I know, but we would like to avoid building a
custom kernel. If
> we do end up going this route, I wonder if there is
a limit for
> MAX_ARG_PAGES. Any idea? I think 128 pages (512K)
would be sufficient
> for our needs.
kiril,
I am guessing that you want to avoid a custom kernel
in order that your programs shall be portable.
So, I am having a hard time understanding why putting
the command line args into a file instead of on the
command line, in a way similar to grep and many other
programs:
"fgrep -F patternfile"
would not answer the case.
Is there any absolute need to have so many args passed
to exec from the command line?
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: max arguments for exec
2001-09-27 15:48 max arguments for exec Carl Spalletta
@ 2001-09-27 16:53 ` Kiril Vidimce
0 siblings, 0 replies; 6+ messages in thread
From: Kiril Vidimce @ 2001-09-27 16:53 UTC (permalink / raw)
To: Carl Spalletta; +Cc: linux-kernel
On Thu, 27 Sep 2001, Carl Spalletta wrote:
> kiril,
>
> I am guessing that you want to avoid a custom kernel
> in order that your programs shall be portable.
>
> So, I am having a hard time understanding why putting
> the command line args into a file instead of on the
> command line, in a way similar to grep and many other
> programs:
>
> "fgrep -F patternfile"
>
> would not answer the case.
>
> Is there any absolute need to have so many args passed
> to exec from the command line?
We are using third party software over which we have no
control. So, it's not up to us.
KV
--
___________________________________________________________________
Studio Tools vkire@pixar.com
Pixar Animation Studios http://www.pixar.com/
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: max arguments for exec
2001-09-27 3:23 ` Kiril Vidimce
@ 2001-09-27 8:18 ` Ingo Molnar
0 siblings, 0 replies; 6+ messages in thread
From: Ingo Molnar @ 2001-09-27 8:18 UTC (permalink / raw)
To: Kiril Vidimce; +Cc: Keith Owens, linux-kernel
On Wed, 26 Sep 2001, Kiril Vidimce wrote:
> Yeah, I know, but we would like to avoid building a custom kernel. If
> we do end up going this route, I wonder if there is a limit for
> MAX_ARG_PAGES. Any idea? I think 128 pages (512K) would be sufficient
> for our needs.
be careful with MAX_ARG_PAGES, because struct binprm is allocated on the
kernel stack, so if it's too big, the kernel stack will overflow in
unexpected places. A realistic limit is 1-2 MB, that causes a 1-2 KB
kernel stack footprint.
(ob'plug: or use the patch i posted, the size of struct binprm is constant
and small there :-)
Ingo
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: max arguments for exec
2001-09-27 2:27 ` Keith Owens
@ 2001-09-27 3:23 ` Kiril Vidimce
2001-09-27 8:18 ` Ingo Molnar
0 siblings, 1 reply; 6+ messages in thread
From: Kiril Vidimce @ 2001-09-27 3:23 UTC (permalink / raw)
To: Keith Owens; +Cc: linux-kernel
On Thu, 27 Sep 2001, Keith Owens wrote:
> On Wed, 26 Sep 2001 14:25:05 -0700 (PDT),
> Kiril Vidimce <vkire@pixar.com> wrote:
> >Is there any way to reconfigure the kernel at runtime to change the
> >limit for arguments passed during an exec? I guess I am looking for
> >something similar to systune ncargs under IRIX. I found this thread
> >in the archives:
> >
> >http://uwsg.iu.edu/hypermail/linux/kernel/0003.0/0160.html
> >
> >The only suggestion was to patch and recompile the kernel. I looked
> >into sysctl and I couldn't find an appropriate argument to tweak.
>
> It is controlled by MAX_ARG_PAGES in include/linux/binfmts.h. Change
> and recompile the kernel, it is not dynamically tunable in Linux.
Yeah, I know, but we would like to avoid building a custom kernel.
If we do end up going this route, I wonder if there is a limit for
MAX_ARG_PAGES. Any idea? I think 128 pages (512K) would be sufficient
for our needs.
KV
--
___________________________________________________________________
Studio Tools vkire@pixar.com
Pixar Animation Studios http://www.pixar.com/
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: max arguments for exec
2001-09-26 21:25 Kiril Vidimce
@ 2001-09-27 2:27 ` Keith Owens
2001-09-27 3:23 ` Kiril Vidimce
0 siblings, 1 reply; 6+ messages in thread
From: Keith Owens @ 2001-09-27 2:27 UTC (permalink / raw)
To: Kiril Vidimce; +Cc: linux-kernel
On Wed, 26 Sep 2001 14:25:05 -0700 (PDT),
Kiril Vidimce <vkire@pixar.com> wrote:
>Is there any way to reconfigure the kernel at runtime to change the
>limit for arguments passed during an exec? I guess I am looking for
>something similar to systune ncargs under IRIX. I found this thread
>in the archives:
>
>http://uwsg.iu.edu/hypermail/linux/kernel/0003.0/0160.html
>
>The only suggestion was to patch and recompile the kernel. I looked
>into sysctl and I couldn't find an appropriate argument to tweak.
It is controlled by MAX_ARG_PAGES in include/linux/binfmts.h. Change
and recompile the kernel, it is not dynamically tunable in Linux.
^ permalink raw reply [flat|nested] 6+ messages in thread
* max arguments for exec
@ 2001-09-26 21:25 Kiril Vidimce
2001-09-27 2:27 ` Keith Owens
0 siblings, 1 reply; 6+ messages in thread
From: Kiril Vidimce @ 2001-09-26 21:25 UTC (permalink / raw)
To: linux-kernel
Is there any way to reconfigure the kernel at runtime to change the
limit for arguments passed during an exec? I guess I am looking for
something similar to systune ncargs under IRIX. I found this thread
in the archives:
http://uwsg.iu.edu/hypermail/linux/kernel/0003.0/0160.html
The only suggestion was to patch and recompile the kernel. I looked
into sysctl and I couldn't find an appropriate argument to tweak.
Thanks for any info,
KV
--
___________________________________________________________________
Studio Tools vkire@pixar.com
Pixar Animation Studios http://www.pixar.com/
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2001-09-27 16:56 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2001-09-27 15:48 max arguments for exec Carl Spalletta
2001-09-27 16:53 ` Kiril Vidimce
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2001-09-26 21:25 Kiril Vidimce
2001-09-27 2:27 ` Keith Owens
2001-09-27 3:23 ` Kiril Vidimce
2001-09-27 8:18 ` Ingo Molnar
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