From: Kirill Korotaev <dev@sw.ru>
To: manfred@colorfullife.com
Cc: linux-kernel@vger.kernel.org
Subject: Again: Fix multithread coredump deadlock (patch Manfred Spraul)
Date: Thu, 3 Jul 2003 12:38:10 +0400 [thread overview]
Message-ID: <200307031238.10570.dev@sw.ru> (raw)
Hi!
There was a patch some time ago included in linux-2.4.17-pre6 which fixed mmap
semaphore deadlock in do_coredump (double down_read() on mmap_sem).
This fix introduces down_write() on mmap_sem and uses get_user_pages()
function to avoid do_page_fault().
The question is why down_write() is used in elf_core_dump() (instead of
down_read())?
Kirill
next reply other threads:[~2003-07-03 8:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-03 8:38 Kirill Korotaev [this message]
2003-07-03 17:02 ` Again: Fix multithread coredump deadlock (patch Manfred Spraul) Manfred Spraul
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