From: Valerie Henson <val_henson@linux.intel.com>
To: Andreas Mohr <andi@rhlx01.fht-esslingen.de>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>,
Ulrich Drepper <drepper@redhat.com>,
Blaisorblade <blaisorblade@yahoo.it>,
Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org,
Linux Memory Management <linux-mm@kvack.org>,
Val Henson <val.henson@intel.com>
Subject: Re: [patch 00/14] remap_file_pages protection support
Date: Tue, 16 May 2006 09:31:12 -0700 [thread overview]
Message-ID: <20060516163111.GK9612@goober> (raw)
In-Reply-To: <20060516135135.GA28995@rhlx01.fht-esslingen.de>
On Tue, May 16, 2006 at 03:51:35PM +0200, Andreas Mohr wrote:
>
> I cannot offer much other than some random confirmation that from my own
> oprofiling, whatever I did (often running a load test script consisting of
> launching 30 big apps at the same time), find_vma basically always showed up
> very prominently in the list of vmlinux-based code (always ranking within the
> top 4 or 5 kernel hotspots, such as timer interrupts, ACPI idle I/O etc.pp.).
> call-tracing showed it originating from mmap syscalls etc., and AFAIR quite
> some find_vma activity from oprofile itself.
This is important: Which kernel?
The cases I saw it in were in a (now old) SuSE kernel which as it
turns out had old/different vma lookup code.
Thanks,
-VAL
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next prev parent reply other threads:[~2006-05-16 16:31 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20060430172953.409399000@zion.home.lan>
2006-05-02 3:45 ` Nick Piggin
2006-05-02 3:56 ` Nick Piggin
2006-05-02 11:24 ` Ingo Molnar
2006-05-02 12:19 ` Nick Piggin
2006-05-02 17:16 ` Lee Schermerhorn
2006-05-03 1:20 ` Blaisorblade
2006-05-03 14:35 ` Lee Schermerhorn
2006-05-03 0:25 ` Blaisorblade
2006-05-06 16:05 ` Ulrich Drepper
2006-05-07 4:22 ` Nick Piggin
2006-05-13 14:13 ` Nick Piggin
2006-05-13 18:19 ` Valerie Henson
2006-05-13 22:54 ` Valerie Henson
2006-05-16 13:30 ` Nick Piggin
2006-05-16 13:51 ` Andreas Mohr
2006-05-16 16:31 ` Valerie Henson [this message]
2006-05-16 16:47 ` Andreas Mohr
2006-05-17 3:25 ` Nick Piggin
2006-05-17 6:10 ` Blaisorblade
2006-05-16 16:33 ` Valerie Henson
2006-05-03 0:44 ` Blaisorblade
2006-05-06 9:06 ` Nick Piggin
2006-05-06 15:26 ` Ulrich Drepper
[not found] ` <20060430173025.752423000@zion.home.lan>
2006-05-02 3:53 ` [patch 11/14] remap_file_pages protection support: pte_present should not trigger on PTE_FILE PROTNONE ptes Nick Piggin
2006-05-03 1:29 ` Blaisorblade
2006-05-06 10:03 ` Nick Piggin
2006-05-07 17:50 ` Blaisorblade
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