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From: Andi Kleen <>
To: Nick Piggin <>
Cc: Ingo Molnar <>,
	Linux Kernel Mailing List <>,
Subject: Re: [rfc][patch] x86-64 new smp_call_function design
Date: Wed, 27 Feb 2008 14:33:00 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

> *vmalloc* TLB flushing. 
> void flush_tlb_all(void)
> {
>         on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
> }
> Of course we could use a new vector for it and speed it up a lot more,
> but after my vmalloc improvements I think that would be a waste of a
> vector at this point.

Ah I see sorry. If you want to just speed up vmalloc flushing I think
the easier way would be to just extend the normal TLB flusher for
vmalloc. So alone for this it probably wouldn't be worth it.

But I think it'll be useful for a couple of other things.

>>> As far as I understand, calling a subset of online CPUs that is not all or
>>> one, is used quite infrequently, so this might be OK.
>> With cpusets and isolation etc. it is the normal case.
> Oh really? Coming from what callers?

The isolation work is not merged yet, but it will essentially need
to turn a lot of the _call_function()s into _call_function_mask()


  reply	other threads:[~2008-02-27 13:31 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-27 12:42 Nick Piggin
2008-02-27 13:04 ` Andi Kleen
2008-02-27 13:07   ` Nick Piggin
2008-02-27 13:33     ` Andi Kleen [this message]
2008-03-16 14:33       ` Avi Kivity
2008-02-27 13:27 ` Ingo Molnar
2008-02-27 13:50   ` Nick Piggin
2008-02-27 15:02     ` Ingo Molnar
2008-02-27 22:14       ` Nick Piggin
2008-02-28  8:45         ` Ingo Molnar
2008-02-28 12:55           ` Andi Kleen

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