From: Rik van Riel <riel@redhat.com>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>, shak <dshaks@redhat.com>
Subject: Re: [PATCH] lazy freeing of memory through MADV_FREE
Date: Mon, 23 Apr 2007 00:28:44 -0400 [thread overview]
Message-ID: <462C35FC.3050109@redhat.com> (raw)
In-Reply-To: <462ACA40.8070407@yahoo.com.au>
Nick Piggin wrote:
> So where is the down_write coming from in this workload, I wonder?
> Heap management? What syscalls?
Trying to answer this question, I straced the mysql threads that
showed up in top when running a single threaded sysbench workload.
There were no mmap, munmap, brk, mprotect or madvise system calls
in the trace.
MySQL has me puzzled, but it seems to have some other people
interested too.
I think I'll go play a bit with ebizzy now, to see how other
workloads are affected by our kernel changes.
next prev parent reply other threads:[~2007-04-23 4:19 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-17 7:15 [PATCH] lazy freeing of memory through MADV_FREE Rik van Riel
2007-04-19 21:15 ` [PATCH] lazy freeing of memory through MADV_FREE 2/2 Rik van Riel
2007-04-20 21:03 ` Andrew Morton
2007-04-20 21:24 ` Ulrich Drepper
2007-04-21 7:37 ` Hugh Dickins
2007-04-21 16:32 ` Ulrich Drepper
2007-04-20 20:57 ` [PATCH] lazy freeing of memory through MADV_FREE Andrew Morton
2007-04-20 21:38 ` Rik van Riel
2007-04-20 22:06 ` Andrew Morton
2007-04-20 23:52 ` Rik van Riel
2007-04-21 0:48 ` Eric Dumazet
2007-04-21 3:58 ` Rik van Riel
2007-04-21 7:12 ` Jakub Jelinek
2007-04-23 4:36 ` Nick Piggin
2007-04-22 2:36 ` Nick Piggin
2007-04-22 2:50 ` Nick Piggin
2007-04-22 6:31 ` Rik van Riel
2007-04-23 0:16 ` Nick Piggin
2007-04-23 3:53 ` Rik van Riel
2007-04-23 3:58 ` Nick Piggin
2007-04-23 10:07 ` Nick Piggin
2007-04-23 10:12 ` Rik van Riel
2007-04-23 3:59 ` Rik van Riel
2007-04-23 9:20 ` Rik van Riel
2007-04-23 10:21 ` Nick Piggin
2007-04-23 10:31 ` Rik van Riel
2007-04-23 10:35 ` Nick Piggin
2007-04-23 10:44 ` Rik van Riel
2007-04-24 1:15 ` Nick Piggin
2007-04-24 1:58 ` Rik van Riel
2007-04-24 2:16 ` Nick Piggin
2007-04-24 4:42 ` Paul Mackerras
2007-04-24 5:13 ` Rik van Riel
2007-04-24 2:53 ` Rik van Riel
2007-04-24 3:08 ` Andrew Morton
2007-04-23 10:44 ` Jakub Jelinek
2007-04-23 11:45 ` Rik van Riel
2007-04-23 4:28 ` Rik van Riel [this message]
2007-04-21 7:24 ` Hugh Dickins
2007-04-21 18:06 ` Rik van Riel
2007-04-22 8:18 ` Andrew Morton
2007-04-22 9:16 ` Christoph Hellwig
2007-04-22 16:55 ` Ulrich Drepper
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