From: William Lee Irwin III <wli@holomorphy.com>
To: Andrea Arcangeli <andrea@novell.com>
Cc: Hugh Dickins <hugh@veritas.com>,
linux-kernel@vger.kernel.org, Andrew Morton <akpm@osdl.org>
Subject: Re: per-process shared information
Date: Fri, 15 Oct 2004 03:51:01 -0700 [thread overview]
Message-ID: <20041015105101.GF5607@holomorphy.com> (raw)
In-Reply-To: <20041014223730.GI17849@dualathlon.random>
On Thu, Oct 14, 2004 at 10:49:28PM +0100, Hugh Dickins wrote:
>> shouldn't change that now, but add your statm_phys_shared; whatever,
On Fri, Oct 15, 2004 at 12:37:30AM +0200, Andrea Arcangeli wrote:
> the only reason to add statm_phys_shared was to keep ps xav fast, if you
> don't slowdown pa xav you can add another field at the end of statm.
> Ideally shared should have been set to 0 and it should have been moved
> to statm_phys_shared. It's slow but not so horrid thanks to the mapcount
> which makes it really strightforward (it's just a vma + pgtable walk,
> the only tricky bit is the signal catch and need_resched).
I'd be rather loath to endorse reintroducing the problematic pagetable
and vma walks I spent so much effort eliminating. Will Hugh's patch
suffice for you? If not, what else is needed?
-- wli
next prev parent reply other threads:[~2004-10-15 10:51 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-13 23:10 per-process shared information Andrea Arcangeli
2004-10-14 21:47 ` Marcelo Tosatti
2004-10-14 23:58 ` Andrea Arcangeli
2004-10-14 23:17 ` Marcelo Tosatti
2004-10-15 10:45 ` William Lee Irwin III
2004-10-14 21:49 ` Hugh Dickins
2004-10-14 22:11 ` William Lee Irwin III
2004-10-14 22:37 ` Andrea Arcangeli
2004-10-15 10:51 ` William Lee Irwin III [this message]
2004-10-15 11:56 ` Hugh Dickins
2004-10-15 13:19 ` Albert Cahalan
2004-10-15 14:28 ` William Lee Irwin III
2004-10-15 14:40 ` Albert Cahalan
2004-10-15 14:52 ` William Lee Irwin III
2004-10-15 17:02 ` Andrea Arcangeli
2004-10-15 16:20 ` Andrea Arcangeli
2004-10-15 16:31 ` Albert Cahalan
2004-10-15 17:10 ` William Lee Irwin III
2004-10-15 19:29 ` Albert Cahalan
2004-10-15 17:13 ` Andrea Arcangeli
2004-10-15 17:51 ` Albert Cahalan
2004-10-15 18:14 ` Andrea Arcangeli
2004-10-15 18:30 ` William Lee Irwin III
2004-10-15 18:40 ` Andrea Arcangeli
2004-10-15 18:47 ` William Lee Irwin III
2004-10-15 19:23 ` Andrea Arcangeli
2004-10-15 20:41 ` William Lee Irwin III
2004-10-15 20:52 ` Andrea Arcangeli
2004-10-15 21:16 ` William Lee Irwin III
2004-10-15 21:28 ` Andrea Arcangeli
2004-10-15 21:40 ` William Lee Irwin III
2004-10-15 22:04 ` Hugh Dickins
2004-10-19 15:09 ` Bill Davidsen
2004-10-15 16:04 ` Andrea Arcangeli
2004-10-19 15:18 ` Bill Davidsen
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