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From: "David S. Miller" <davem@redhat.com>
To: wagnerjd@prodigy.net
Cc: robm@fastmail.fm, hahn@physics.mcmaster.ca,
	linux-kernel@vger.kernel.org, jhoward@fastmail.fm
Subject: Re: Strange load spikes on 2.4.19 kernel
Date: Sun, 13 Oct 2002 01:13:44 -0700 (PDT)	[thread overview]
Message-ID: <20021013.011344.58438240.davem@redhat.com> (raw)
In-Reply-To: <000e01c27290$dd0b5640$7443f4d1@joe>

   From: "Joseph D. Wagner" <wagnerjd@prodigy.net>
   Date: Sun, 13 Oct 2002 03:16:30 -0500

   "SMP locking primitives"? Tell me what that is again?  Oh yeah!  That's
   when the kernel basically gives SMP a timeout and behaves as if there
   was only one processor.
   
   So in effect, I was right.  File processes really do use one and only
   one processor.
   
Not true.  While a block is being allocated on mounted filesystem X
on one cpu, a TCP packet can be being processed on another processor and
a block can be allocated on mounted filesystem Y on another processor.

Actually, it can even be threaded to the point where block allocations
on the same filesystem can occur in parallel as long as it is being
done for different block groups.

So in effect, you're not so right.

  reply	other threads:[~2002-10-13  8:14 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <Pine.LNX.4.33.0210130202070.17395-100000@coffee.psychology.mcmaster.ca>
2002-10-13  6:34 ` Strange load spikes on 2.4.19 kernel Rob Mueller
2002-10-13  7:01   ` Joseph D. Wagner
2002-10-13  7:01     ` David S. Miller
2002-10-13  7:49       ` Joseph D. Wagner
2002-10-13  7:50         ` David S. Miller
2002-10-13  8:16           ` Joseph D. Wagner
2002-10-13  8:13             ` David S. Miller [this message]
2002-10-13  8:40               ` Joseph D. Wagner
2002-10-13  8:45                 ` David S. Miller
2002-10-13  8:48                 ` Mike Galbraith
2002-10-13  8:48                   ` David S. Miller
2002-10-13  8:51                 ` William Lee Irwin III
2002-10-13 10:20                 ` Ingo Molnar
2002-10-13 19:42                 ` Rik van Riel
2002-10-16 21:00         ` Bill Davidsen
2002-10-13  8:59     ` Anton Blanchard
2002-10-13  9:26       ` William Lee Irwin III
2002-10-13 12:31   ` Marius Gedminas
2002-12-11 22:54 Steven Roussey
2002-12-11 23:09 ` Andrew Morton
2002-12-11 23:54   ` Steven Roussey
2002-12-12  0:13     ` Andrew Morton
2002-12-12  0:31       ` Steven Roussey
     [not found] <113001c27282$93955eb0$1900a8c0@lifebook.suse.lists.linux.kernel>
     [not found] ` <000001c27286$6ab6bc60$7443f4d1@joe.suse.lists.linux.kernel>
     [not found]   ` <20021013.000127.43007739.davem@redhat.com.suse.lists.linux.kernel>
2002-10-13  7:24     ` Andi Kleen
2002-10-13  7:21       ` David S. Miller
2002-10-13 11:47       ` Hugh Dickins
2002-10-13 18:29         ` Andrew Morton
     [not found] <Pine.LNX.4.33.0210121605490.16179-100000@coffee.psychology.mcmaster.ca>
2002-10-13  0:49 ` Rob Mueller
     [not found] <001401c2719b$9d45c4a0$53241c43@joe>
2002-10-12  6:54 ` Rob Mueller
  -- strict thread matches above, loose matches on Subject: below --
2002-10-12  3:13 Joseph D. Wagner
2002-10-12  3:10 Joseph D. Wagner
2002-10-12  1:12 Rob Mueller
2002-10-12  1:25 ` Andrew Morton
2002-10-12  2:25   ` Rob Mueller
2002-10-12  3:07     ` Andrew Morton
2002-10-12  6:37       ` Rob Mueller
2002-10-12  6:44         ` Andrew Morton
2002-10-12  6:52           ` Rob Mueller
2002-10-12  7:00             ` Andrew Morton
2002-10-13  6:14               ` Rob Mueller
2002-10-13  7:27                 ` Simon Kirby

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