From: Andi Kleen <ak@suse.de>
To: Arjan van de Ven <arjan@infradead.org>
Cc: rohitseth@google.com, Andrew Morton <akpm@osdl.org>,
Linux-mm@kvack.org, Linux-kernel@vger.kernel.org
Subject: Re: [PATCH]: Adding a counter in vma to indicate the number of physical pages backing it
Date: Mon, 12 Jun 2006 13:17:44 +0200 [thread overview]
Message-ID: <200606121317.44139.ak@suse.de> (raw)
In-Reply-To: <1150042142.3131.82.camel@laptopd505.fenrus.org>
On Sunday 11 June 2006 18:09, Arjan van de Ven wrote:
> On Fri, 2006-06-09 at 18:33 -0700, Rohit Seth wrote:
> > Below is a patch that adds number of physical pages that each vma is
> > using in a process. Exporting this information to user space
> > using /proc/<pid>/maps interface.
>
> is it really worth bloating the vma struct for this? there are quite a
> few workloads that have a gazilion vma's, and this patch adds both
> memory usage and cache pressure to those workloads...
I agree it's a bad idea. smaps is only a debugging kludge anyways
and it's not a good idea to we bloat core data structures for it.
-Andi
WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <ak@suse.de>
To: Arjan van de Ven <arjan@infradead.org>
Cc: rohitseth@google.com, Andrew Morton <akpm@osdl.org>,
Linux-mm@kvack.org, Linux-kernel@vger.kernel.org
Subject: Re: [PATCH]: Adding a counter in vma to indicate the number of physical pages backing it
Date: Mon, 12 Jun 2006 13:17:44 +0200 [thread overview]
Message-ID: <200606121317.44139.ak@suse.de> (raw)
In-Reply-To: <1150042142.3131.82.camel@laptopd505.fenrus.org>
On Sunday 11 June 2006 18:09, Arjan van de Ven wrote:
> On Fri, 2006-06-09 at 18:33 -0700, Rohit Seth wrote:
> > Below is a patch that adds number of physical pages that each vma is
> > using in a process. Exporting this information to user space
> > using /proc/<pid>/maps interface.
>
> is it really worth bloating the vma struct for this? there are quite a
> few workloads that have a gazilion vma's, and this patch adds both
> memory usage and cache pressure to those workloads...
I agree it's a bad idea. smaps is only a debugging kludge anyways
and it's not a good idea to we bloat core data structures for it.
-Andi
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next prev parent reply other threads:[~2006-06-12 11:21 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-10 1:33 [PATCH]: Adding a counter in vma to indicate the number of physical pages backing it Rohit Seth
2006-06-10 1:33 ` Rohit Seth
2006-06-10 2:42 ` Andrew Morton
2006-06-10 2:42 ` Andrew Morton
2006-06-12 17:49 ` Rohit Seth
2006-06-12 17:49 ` Rohit Seth
2006-06-10 7:35 ` Nick Piggin
2006-06-10 7:35 ` Nick Piggin
2006-06-11 10:15 ` Jan Engelhardt
2006-06-11 10:15 ` Jan Engelhardt
2006-06-12 17:36 ` Rohit Seth
2006-06-12 17:36 ` Rohit Seth
2006-06-12 17:58 ` Andi Kleen
2006-06-12 17:58 ` Andi Kleen
2006-06-12 19:42 ` Rohit Seth
2006-06-12 19:42 ` Rohit Seth
2006-06-13 3:51 ` Andi Kleen
2006-06-13 3:51 ` Andi Kleen
2006-06-13 4:27 ` Nick Piggin
2006-06-13 4:27 ` Nick Piggin
2006-06-13 16:59 ` Rohit Seth
2006-06-13 16:59 ` Rohit Seth
2006-06-13 17:28 ` Hugh Dickins
2006-06-13 17:28 ` Hugh Dickins
2006-06-13 18:09 ` Rohit Seth
2006-06-13 18:09 ` Rohit Seth
2006-06-13 17:31 ` Andi Kleen
2006-06-13 17:31 ` Andi Kleen
2006-06-11 16:09 ` Arjan van de Ven
2006-06-11 16:09 ` Arjan van de Ven
2006-06-12 11:17 ` Andi Kleen [this message]
2006-06-12 11:17 ` Andi Kleen
2006-06-12 12:49 ` Jan Engelhardt
2006-06-12 12:49 ` Jan Engelhardt
2006-06-12 12:54 ` Andi Kleen
2006-06-12 12:54 ` Andi Kleen
2006-06-12 16:43 ` Christoph Lameter
2006-06-12 16:43 ` Christoph Lameter
-- strict thread matches above, loose matches on Subject: below --
2006-06-13 5:53 [PATCH]: Adding a counter in vma to indicate the number of physical_pages_backing it Albert Cahalan
2006-06-13 5:53 ` Albert Cahalan
2006-06-13 5:56 ` Andi Kleen
2006-06-13 5:56 ` Andi Kleen
2006-06-13 17:10 ` Rohit Seth
2006-06-13 17:10 ` Rohit Seth
2006-06-13 17:18 ` Andi Kleen
2006-06-13 17:18 ` Andi Kleen
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