* Re: Updated dynamic pty patch available
2004-02-12 6:00 Updated dynamic pty patch available H. Peter Anvin
@ 2004-02-12 10:48 ` William Lee Irwin III
2004-02-13 15:37 ` Valdis.Kletnieks
2004-02-14 23:37 ` Matt Mackall
2 siblings, 0 replies; 4+ messages in thread
From: William Lee Irwin III @ 2004-02-12 10:48 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: linux-kernel, tytso
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On Wed, Feb 11, 2004 at 10:00:46PM -0800, H. Peter Anvin wrote:
> This version of the patch makes *both* legacy and Unix98 ptys configure
> options (Unix98 only if EMBEDDED), and the number of legacy ptys is a
> configuration option -- useful if you want to reduce the memory
> footprint, or if you really wants lots of these guys (256 is no longer a
> hard limit.)
> Additionally, I have added a sysctl option -- /proc/sys/kernel/pty/max
> -- for limiting the number of Unix98 ptys. It was way too effective a
> DoS to eat up all kernel memory by opening /dev/ptmx repeatedly. The
> default is 4096, but it can be adjusted all the way up to 2^20 if desirable.
Comes up and boots just fine here on my target boxen. I'm glad to have it.
Bootlog from one of them attached.
I can send in console/etc. logs from both host and target of stress test
runs, if provided stress tests.
-- wli
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Updated dynamic pty patch available
2004-02-12 6:00 Updated dynamic pty patch available H. Peter Anvin
2004-02-12 10:48 ` William Lee Irwin III
@ 2004-02-13 15:37 ` Valdis.Kletnieks
2004-02-14 23:37 ` Matt Mackall
2 siblings, 0 replies; 4+ messages in thread
From: Valdis.Kletnieks @ 2004-02-13 15:37 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: linux-kernel, tytso, William Lee Irwin III
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On Wed, 11 Feb 2004 22:00:46 PST, "H. Peter Anvin" said:
> ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/dynpty-test-2.patch
>
> ... against the current top-of-bkcvs 2.6 kernel.
>
> This version of the patch makes *both* legacy and Unix98 ptys configure
> options (Unix98 only if EMBEDDED), and the number of legacy ptys is a
> configuration option -- useful if you want to reduce the memory
> footprint, or if you really wants lots of these guys (256 is no longer a
> hard limit.)
Patches, compiles, boots, and runs against 2.6.3-rc2-mm1, both with
and without legacy ptys. Haven't gotten brave enough to try without
Unix98 ptys, as I need those :)
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Updated dynamic pty patch available
2004-02-12 6:00 Updated dynamic pty patch available H. Peter Anvin
2004-02-12 10:48 ` William Lee Irwin III
2004-02-13 15:37 ` Valdis.Kletnieks
@ 2004-02-14 23:37 ` Matt Mackall
2 siblings, 0 replies; 4+ messages in thread
From: Matt Mackall @ 2004-02-14 23:37 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: linux-kernel, tytso, William Lee Irwin III
On Wed, Feb 11, 2004 at 10:00:46PM -0800, H. Peter Anvin wrote:
> ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/dynpty-test-2.patch
>
> ... against the current top-of-bkcvs 2.6 kernel.
>
> This version of the patch makes *both* legacy and Unix98 ptys configure
> options (Unix98 only if EMBEDDED), and the number of legacy ptys is a
> configuration option -- useful if you want to reduce the memory
> footprint, or if you really wants lots of these guys (256 is no longer a
> hard limit.)
>
> Additionally, I have added a sysctl option -- /proc/sys/kernel/pty/max
> -- for limiting the number of Unix98 ptys. It was way too effective a
> DoS to eat up all kernel memory by opening /dev/ptmx repeatedly. The
> default is 4096, but it can be adjusted all the way up to 2^20 if desirable.
Looks good, I'll drop this into -tiny when I have proper net access
again.
--
Matt Mackall : http://www.selenic.com : Linux development and consulting
^ permalink raw reply [flat|nested] 4+ messages in thread