GNU bug report logs - #7489
[coreutils] over aggressive threads in sort

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Chen Guo <chen.guo.0625 <at> gmail.com>
Cc: DJ Lucas <dj <at> linuxfromscratch.org>, 7489 <at> debbugs.gnu.org, coreutils <at> gnu.org
Subject: bug#7489: [coreutils] over aggressive threads in sort
Date: Mon, 29 Nov 2010 16:39:44 -0800

On 11/29/10 16:34, Chen Guo wrote:
> The only way this would work is if, when a struct is locked via mutex the only
> threads trying to acquire the struct are trying to do so via mutex,
> and no threads
> are looking to lock via spinlock.

Yes, that's definitely the idea.  Under either of my
proposals, a particular object would be protected either
by a spinlock, or by a mutex, but never by both; and the
decision as to whether to use a spinlock or a mutex would
be made by object-creation time at the latest.

Thanks for looking into it.

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