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From: David Howells <dhowells@redhat.com>
To: "Kawai, Hidehiro" <hidehiro.kawai.ez@hitachi.com>
Cc: Andrew Morton <akpm@osdl.org>,
	kernel list <linux-kernel@vger.kernel.org>,
	Pavel Machek <pavel@ucw.cz>, Robin Holt <holt@sgi.com>,
	Alan Cox <alan@lxorguk.ukuu.org.uk>,
	Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
	sugita <yumiko.sugita.yf@hitachi.com>,
	Satoshi OSHIMA <soshima@redhat.com>,
	"Hideo AOKI@redhat" <haoki@redhat.com>
Subject: Re: [PATCH 0/4] coredump: core dump masking support v3
Date: Fri, 16 Feb 2007 15:08:54 +0000	[thread overview]
Message-ID: <20425.1171638534@redhat.com> (raw)
In-Reply-To: <45D5B2E3.3030607@hitachi.com>

Kawai, Hidehiro <hidehiro.kawai.ez@hitachi.com> wrote:

> To avoid the above situation we can limit the core file size by
> setrlimit(2) or ulimit(1). But this method can lose important data
> such as stack because core dumping is terminated halfway.
> So I suggest keeping shared memory segments from being dumped for
> particular processes.

A better way might be to place the shared memory segments last if that's
possible (I'm not sure ELF supports out-of-order segments).

> Because the shared memory attached to processes is common in them, we don't
> need to dump the shared memory every time.

So there's no guarantee that they'll be dumped at all...  I'm not sure there's
any way around that, however.

David

  parent reply	other threads:[~2007-02-16 15:09 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-16 13:34 [PATCH 0/4] coredump: core dump masking support v3 Kawai, Hidehiro
2007-02-16 13:39 ` [PATCH 1/4] coredump: add an interface to control the core dump routine Kawai, Hidehiro
2007-02-16 13:40 ` [PATCH 2/4] coredump: ELF: enable to omit anonymous shared memory Kawai, Hidehiro
2007-02-16 13:41 ` [PATCH 3/4] coredump: ELF-FDPIC: " Kawai, Hidehiro
2007-02-16 13:42 ` [PATCH 4/4] coredump: documentation for proc entry Kawai, Hidehiro
2007-02-16 15:05 ` [PATCH 3/4] coredump: ELF-FDPIC: enable to omit anonymous shared memory David Howells
2007-02-16 16:50   ` Robin Holt
2007-02-16 20:09   ` David Howells
2007-03-02 16:55     ` Hugh Dickins
2007-03-03 14:10     ` David Howells
2007-03-05 19:04       ` Hugh Dickins
2007-03-06 18:13       ` David Howells
2007-03-09 14:12       ` Move to unshared VMAs in NOMMU mode? David Howells
2007-03-12 20:50         ` Robin Getz
2007-03-13 10:14         ` David Howells
2007-03-15 21:20         ` Hugh Dickins
2007-03-15 22:47         ` David Howells
2007-03-19 19:23           ` Eric W. Biederman
2007-03-20 11:06           ` David Howells
2007-03-20 16:48             ` Eric W. Biederman
2007-03-20 19:12             ` David Howells
2007-03-20 19:51             ` David Howells
2007-03-21 16:11             ` David Howells
2007-03-03 14:25     ` [PATCH] NOMMU: Hide vm_mm in NOMMU mode David Howells
2007-02-20  9:45   ` [PATCH 3/4] coredump: ELF-FDPIC: enable to omit anonymous shared memory Kawai, Hidehiro
2007-02-20 10:58   ` David Howells
2007-02-20 12:56     ` Robin Holt
2007-02-21 10:00     ` Kawai, Hidehiro
2007-02-21 11:33     ` David Howells
2007-02-21 11:54       ` Robin Holt
2007-02-22  5:33         ` Kawai, Hidehiro
2007-02-22 11:47         ` David Howells
2007-02-16 15:08 ` David Howells [this message]
2007-02-20  9:48   ` [PATCH 0/4] coredump: core dump masking support v3 Kawai, Hidehiro
2007-02-24  3:32 ` Markus Gutschke
2007-02-24 11:39   ` Pavel Machek
2007-03-01 12:35   ` Kawai, Hidehiro
2007-03-01 18:16     ` Markus Gutschke
2007-02-24 10:02 ` David Howells
2007-02-24 20:01   ` Markus Gutschke
2007-02-26 11:49   ` David Howells
2007-02-26 12:01     ` Pavel Machek
2007-02-26 12:42     ` David Howells

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