From: Nick Piggin <nickpiggin@yahoo.com.au>
To: William Lee Irwin III <wli@holomorphy.com>
Cc: Andi Kleen <ak@suse.de>,
Linux Memory Management <linux-mm@kvack.org>,
Hugh Dickins <hugh@veritas.com>,
Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH 4/10] alternate 4-level page tables patches
Date: Sun, 19 Dec 2004 11:38:56 +1100 [thread overview]
Message-ID: <41C4CDA0.5090504@yahoo.com.au> (raw)
In-Reply-To: <20041219002010.GN771@holomorphy.com>
William Lee Irwin III wrote:
> William Lee Irwin III wrote:
>
>>>vmas are unmapped one-by-one during process destruction.
>
>
> On Sun, Dec 19, 2004 at 11:05:22AM +1100, Nick Piggin wrote:
>
>>Yeah but clear_page_tables isn't called for each vma that is unmapped
>>at exit time. Rather, one big one is called at the end - I suspect
>>this is usually more efficient.
>
>
> For clear_page_tables() you want to scan as little as possible. The
Sure. I wonder if we could cut down the amount of scanning by keeping
track of what ranges of vmas have been unmapped... still, I don't think
I have seen this function high on a profile, so until then I personally
don't think I'll bother ;)
> exit()-time performance issue is tlb_finish_mmu().
>
Makes sense. I guess there is often a lot of memory one has to shoot
down.
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next prev parent reply other threads:[~2004-12-19 0:38 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-18 6:55 [RFC][PATCH 0/10] " Nick Piggin
2004-12-18 6:55 ` [PATCH 1/10] " Nick Piggin
2004-12-18 6:56 ` [PATCH 2/10] " Nick Piggin
2004-12-18 6:56 ` [PATCH 3/10] " Nick Piggin
2004-12-18 6:57 ` [PATCH 4/10] " Nick Piggin
2004-12-18 6:58 ` [PATCH 5/10] " Nick Piggin
2004-12-18 6:58 ` [PATCH 6/10] " Nick Piggin
2004-12-18 6:59 ` [PATCH 7/10] " Nick Piggin
2004-12-18 7:00 ` [PATCH 8/10] " Nick Piggin
2004-12-18 7:00 ` [PATCH 9/10] " Nick Piggin
2004-12-18 7:01 ` [PATCH 10/10] " Nick Piggin
2004-12-18 7:31 ` Andi Kleen
2004-12-18 7:46 ` Nick Piggin
2004-12-18 8:08 ` Andrew Morton
2004-12-18 9:48 ` Andi Kleen
2004-12-18 19:06 ` Linus Torvalds
2004-12-20 17:43 ` Andi Kleen
2004-12-20 17:47 ` Randy.Dunlap
2004-12-20 18:08 ` Linus Torvalds
2004-12-20 18:15 ` Linus Torvalds
2004-12-20 18:19 ` Andi Kleen
2004-12-20 18:47 ` Linus Torvalds
2004-12-20 18:52 ` Linus Torvalds
2004-12-20 18:59 ` Andi Kleen
2004-12-20 18:57 ` Randy.Dunlap
2004-12-18 9:05 ` [PATCH 4/10] " Nick Piggin
2004-12-18 9:50 ` Andi Kleen
2004-12-18 10:06 ` Nick Piggin
2004-12-18 10:11 ` Andi Kleen
2004-12-18 10:22 ` Nick Piggin
2004-12-18 10:29 ` Nick Piggin
2004-12-18 11:06 ` William Lee Irwin III
2004-12-18 11:17 ` Nick Piggin
2004-12-18 11:32 ` William Lee Irwin III
2004-12-18 11:55 ` Nick Piggin
2004-12-18 12:46 ` William Lee Irwin III
2004-12-18 12:48 ` William Lee Irwin III
2004-12-19 0:05 ` Nick Piggin
2004-12-19 0:20 ` William Lee Irwin III
2004-12-19 0:38 ` Nick Piggin [this message]
2004-12-19 1:01 ` William Lee Irwin III
2004-12-19 1:31 ` Linus Torvalds
2004-12-19 2:08 ` William Lee Irwin III
2004-12-19 2:26 ` Nick Piggin
2004-12-19 5:23 ` Linus Torvalds
2004-12-19 6:02 ` William Lee Irwin III
2004-12-19 18:17 ` Linus Torvalds
2004-12-20 1:00 ` William Lee Irwin III
2004-12-18 10:45 ` William Lee Irwin III
2004-12-18 10:58 ` Nick Piggin
2004-12-19 0:07 ` [RFC][PATCH 0/10] " Hugh Dickins
2004-12-19 0:33 ` Nick Piggin
2004-12-20 18:04 ` Andi Kleen
2004-12-20 18:40 ` Linus Torvalds
2004-12-20 18:53 ` Andi Kleen
2004-12-21 0:04 ` Linus Torvalds
2004-12-21 0:22 ` Andi Kleen
2004-12-21 0:43 ` Linus Torvalds
2004-12-21 0:47 ` Nick Piggin
2004-12-21 2:55 ` Hugh Dickins
2004-12-21 3:21 ` Nick Piggin
2004-12-21 3:47 ` Linus Torvalds
2004-12-21 3:56 ` Linus Torvalds
2004-12-21 4:04 ` Nick Piggin
2004-12-21 4:08 ` Nick Piggin
2004-12-21 9:36 ` Andi Kleen
2004-12-21 10:13 ` Hugh Dickins
2004-12-21 10:59 ` Nick Piggin
2004-12-21 17:36 ` Linus Torvalds
2004-12-21 20:19 ` Andi Kleen
2004-12-21 23:49 ` Nick Piggin
2004-12-22 10:38 ` Andi Kleen
2004-12-22 11:19 ` Nick Piggin
2004-12-22 11:23 ` Nick Piggin
2004-12-22 18:07 ` Andi Kleen
2004-12-30 21:24 ` Nick Piggin
2004-12-21 10:52 ` Nick Piggin
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