From: Nick Piggin <nickpiggin@yahoo.com.au>
To: rohitseth@google.com
Cc: 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: Sat, 10 Jun 2006 17:35:11 +1000 [thread overview]
Message-ID: <448A762F.7000105@yahoo.com.au> (raw)
In-Reply-To: <1149903235.31417.84.camel@galaxy.corp.google.com>
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.
>
> There is currently /proc/<pid>/smaps that prints the detailed
> information about the usage of physical pages but that is a very
> expensive operation as it traverses all the PTs (for some one who is
> just interested in getting that data for each vma).
Yet more cacheline footprint in the page fault and unmap paths...
What is this used for and why do we want it? Could you do some
smaps-like interface that can work on ranges of memory, and
continue to walk pagetables instead?
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next prev parent reply other threads:[~2006-06-10 7:35 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-10 1:33 Rohit Seth
2006-06-10 2:42 ` Andrew Morton
2006-06-12 17:49 ` Rohit Seth
2006-06-10 7:35 ` Nick Piggin [this message]
2006-06-11 10:15 ` Jan Engelhardt
2006-06-12 17:36 ` Rohit Seth
2006-06-12 17:58 ` Andi Kleen
2006-06-12 19:42 ` Rohit Seth
2006-06-13 3:51 ` Andi Kleen
2006-06-13 4:27 ` Nick Piggin
2006-06-13 16:59 ` Rohit Seth
2006-06-13 17:28 ` Hugh Dickins
2006-06-13 18:09 ` Rohit Seth
2006-06-13 17:31 ` Andi Kleen
2006-06-11 16:09 ` Arjan van de Ven
2006-06-12 11:17 ` Andi Kleen
2006-06-12 12:49 ` Jan Engelhardt
2006-06-12 12:54 ` Andi Kleen
2006-06-12 16:43 ` Christoph Lameter
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 5:56 ` Andi Kleen
2006-06-13 17:10 ` Rohit Seth
2006-06-13 17:18 ` Andi Kleen
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