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From: Robin Holt <holt@sgi.com>
To: "Kawai, Hidehiro" <hidehiro.kawai.ez@hitachi.com>
Cc: akpm@osdl.org, pavel@suse.cz, linux-kernel@vger.kernel.org,
	dhowells@redhat.com, alan@lxorguk.ukuu.org.uk
Subject: Re: [PATCH 0/4] coredump: core dump masking support v2
Date: Fri, 26 Jan 2007 09:29:07 -0600	[thread overview]
Message-ID: <20070126152907.GB30950@lnx-holt.americas.sgi.com> (raw)
In-Reply-To: <45BA0A93.30004@hitachi.com>

On Fri, Jan 26, 2007 at 11:05:07PM +0900, Kawai, Hidehiro wrote:
> You can specify memory segment types you don't want to dump via
> /proc/<pid>/core_flags file, which is provided per process.
> This file represents a set of flags, but currently, only bit 0 is
> available. If bit 0 is set, the kernel core dump routine doesn't
> dump anonymous shared memory segments, which includes IPC shared
> memory and some of mmap(2)'ed memory.

Can you make this a little more transparent?  Having a magic bitmask does
not seem like the best way to do stuff.  Could you maybe make a core_flags
directory with a seperate file for each flag.  It could still map to a
single field in the mm, but be broken out for the proc filesystem.

I can certainly see the value of this for our customers.  We have some
customers that run jobs in the 1-2TB range.  Most of those customers
have always had coredumps disabled and just rely upon being able to
rerun the application and have MPI drop them into a debugger.

Thanks,
Robin

  parent reply	other threads:[~2007-01-26 15:30 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-26 14:05 [PATCH 0/4] coredump: core dump masking support v2 Kawai, Hidehiro
2007-01-26 14:12 ` [PATCH 1/4] coredump: add an interface to specify omitted memory segment types Kawai, Hidehiro
2007-01-26 14:13 ` [PATCH 2/4] coredump: enable to omit anonymous shared memory Kawai, Hidehiro
2007-01-26 14:14 ` [PATCH 3/4] coredump: add a sysctl parameter to disable the core dump omitting feature Kawai, Hidehiro
2007-01-26 16:56   ` Pavel Machek
2007-01-26 14:15 ` [PATCH 4/4] coredump: documentation for proc and sysctl Kawai, Hidehiro
2007-01-26 15:29 ` Robin Holt [this message]
2007-01-30  7:36   ` [PATCH 0/4] coredump: core dump masking support v2 Kawai, Hidehiro
2007-01-30 12:44     ` Robin Holt
2007-01-31 12:40       ` Kawai, Hidehiro
2007-02-03 12:48         ` Pavel Machek
2007-02-14 13:26           ` Kawai, Hidehiro
2007-02-14 13:30             ` Pavel Machek

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