]> err.no Git - linux-2.6/commit
[PATCH] genirq: msi: simplify the msi irq limit policy
authorEric W. Biederman <ebiederm@xmission.com>
Wed, 4 Oct 2006 09:16:35 +0000 (02:16 -0700)
committerLinus Torvalds <torvalds@g5.osdl.org>
Wed, 4 Oct 2006 14:55:27 +0000 (07:55 -0700)
commit92db6d10bc1bc43330a4c540fa5b64c83d9d865f
treed889ea4ba6d2e55a33d89f05d2b2222bed7788e7
parent38bc0361303535c86f6b67b151a541728d7bdae6
[PATCH] genirq: msi: simplify the msi irq limit policy

Currently we attempt to predict how many irqs we will be able to allocate with
msi using pci_vector_resources and some complicated accounting, and then we
only allow each device as many irqs as we think are available on average.

Only the s2io driver even takes advantage of this feature all other drivers
have a fixed number of irqs they need and bail if they can't get them.

pci_vector_resources is inaccurate if anyone ever frees an irq.  The whole
implmentation is racy.  The current irq limit policy does not appear to make
sense with current drivers.  So I have simplified things.  We can revisit this
we we need a more sophisticated policy.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rajesh Shah <rajesh.shah@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
arch/i386/pci/irq.c
arch/ia64/pci/pci.c
drivers/pci/msi.c
drivers/pci/msi.h