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From: npiggin@suse.de
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Manfred Spraul <manfred@colorfullife.com>,
	Nadia Derbey <Nadia.Derbey@bull.net>,
	Pierre Peiffer <peifferp@gmail.com>,
	linux-kernel@vger.kernel.org
Subject: [patch 0/4] ipc sem improvements
Date: Tue, 11 Aug 2009 21:09:02 +1000	[thread overview]
Message-ID: <20090811110902.255877673@suse.de> (raw)

Hi, this patchset is some improvements I've been trying to make to sysv
semaphore implementation which is pretty suboptimal (O(n^2) behaviour
with n waiting processes, among other things).

I've been quite careful to try retaining fifo and avoiding starvation
even for complex operations.

Comments?

Thanks,
Nick


             reply	other threads:[~2009-08-11 11:54 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-08-11 11:09 npiggin [this message]
2009-08-11 11:09 ` [patch 1/4] ipc: sem optimise undo list search npiggin
2009-08-16 13:17   ` Manfred Spraul
2009-08-11 11:09 ` [patch 2/4] ipc: sem use list operations npiggin
2009-08-16 13:18   ` Manfred Spraul
2009-08-11 11:09 ` [patch 3/4] ipc: sem preempt improve npiggin
2009-08-16 13:20   ` Manfred Spraul
2009-08-11 11:09 ` [patch 4/4] ipc: sem optimise simple operations npiggin
2009-08-11 18:19   ` Manfred Spraul
2009-08-11 18:23     ` Zach Brown
2009-08-12  4:07       ` Nick Piggin
2009-08-12 18:35         ` Manfred Spraul
2009-08-14  8:58           ` Nick Piggin
2009-08-14 17:53             ` Manfred Spraul
2009-08-11 20:07   ` Cyrill Gorcunov
2009-08-12  4:48     ` Nick Piggin
2009-08-12  5:43       ` Cyrill Gorcunov
2009-08-14 18:48   ` Manfred Spraul

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