From: Paul Jackson <pj@sgi.com>
To: William Lee Irwin III <wli@holomorphy.com>
Cc: mikpe@csd.uu.se, nickpiggin@yahoo.com.au, rusty@rustcorp.com.au,
linux-kernel@vger.kernel.org, akpm@osdl.org, ak@muc.de,
ashok.raj@intel.com, hch@infradead.org, jbarnes@sgi.com,
joe.korty@ccur.com, manfred@colorfullife.com,
colpatch@us.ibm.com, Simon.Derr@bull.net
Subject: Re: [PATCH] cpumask 5/10 rewrite cpumask.h - single bitmap based implementation
Date: Fri, 4 Jun 2004 11:42:19 -0700 [thread overview]
Message-ID: <20040604114219.40e50737.pj@sgi.com> (raw)
In-Reply-To: <20040604181233.GF21007@holomorphy.com>
William Lee Irwin III wrote:
> Without any way to reliably determine this, luserspace is fscked.
I don't see why user code needs to determine NR_CPUS exactly. Any
reasonable upper bound should work - reasonable meaning doesn't waste
too many unused words of memory.
It's not really NR_CPUS that users need - its a reasonably close upper
bound to the size of the space that sched_getaffinity() must be provided
they need. And your code does a pretty good job of providing that.
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@sgi.com> 1.650.933.1373
next prev parent reply other threads:[~2004-06-04 18:37 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-03 16:43 [PATCH] Bitmap and Cpumask Cleanup - Overview Paul Jackson
2004-06-03 17:05 ` [PATCH] cpumask 1/10 cpu_present_map real even on non-smp Paul Jackson
2004-06-03 17:09 ` [PATCH] cpumask 2/10 bitmap cleanup preparation for cpumask overhaul Paul Jackson
2004-06-03 17:09 ` [PATCH] cpumask 3/10 bitmap inlining and optimizations Paul Jackson
2004-06-03 17:09 ` [PATCH] cpumask 4/10 uninline find_next_bit on ia64 Paul Jackson
2004-06-03 17:10 ` [PATCH] cpumask 5/10 rewrite cpumask.h - single bitmap based implementation Paul Jackson
2004-06-04 0:07 ` Andrew Morton
2004-06-04 0:25 ` Andrew Morton
2004-06-04 2:58 ` Paul Jackson
2004-06-04 2:47 ` Paul Jackson
2004-06-04 2:54 ` David S. Miller
2004-06-04 5:02 ` Paul Jackson
2004-06-04 5:01 ` David S. Miller
2004-06-04 1:47 ` Rusty Russell
2004-06-04 2:02 ` Nick Piggin
2004-06-04 2:19 ` Rusty Russell
2004-06-04 5:18 ` Paul Jackson
2004-06-04 5:22 ` David S. Miller
2004-06-04 6:57 ` Paul Jackson
2004-06-04 9:31 ` Mikael Pettersson
2004-06-04 9:37 ` William Lee Irwin III
2004-06-04 9:46 ` Mikael Pettersson
2004-06-04 9:59 ` William Lee Irwin III
2004-06-04 11:16 ` Mikael Pettersson
2004-06-04 11:27 ` William Lee Irwin III
2004-06-04 11:32 ` William Lee Irwin III
2004-06-04 16:23 ` Paul Jackson
2004-06-04 16:28 ` William Lee Irwin III
2004-06-04 17:47 ` Paul Jackson
2004-06-04 18:12 ` William Lee Irwin III
2004-06-04 18:20 ` William Lee Irwin III
2004-06-04 18:27 ` Andrew Morton
2004-06-04 18:38 ` William Lee Irwin III
2004-06-05 2:51 ` William Lee Irwin III
2004-06-05 3:29 ` William Lee Irwin III
2004-06-04 18:42 ` Paul Jackson [this message]
2004-06-04 18:42 ` William Lee Irwin III
2004-06-05 6:48 ` Paul Jackson
2004-06-06 2:07 ` Rusty Russell
2004-06-06 12:16 ` Paul Jackson
2004-06-06 12:13 ` William Lee Irwin III
2004-06-06 12:28 ` Paul Jackson
2004-06-06 12:36 ` William Lee Irwin III
2004-06-06 13:42 ` Paul Jackson
2004-06-06 23:20 ` Rusty Russell
2004-06-07 6:44 ` Paul Jackson
2004-06-04 9:41 ` Andrew Morton
2004-06-05 7:01 ` Paul Jackson
2004-06-04 16:03 ` Paul Jackson
2004-06-04 16:56 ` William Lee Irwin III
2004-06-04 17:29 ` Paul Jackson
2004-06-04 17:52 ` William Lee Irwin III
2004-06-04 19:01 ` Paul Jackson
2004-06-04 19:08 ` Anton Blanchard
2004-06-04 19:17 ` William Lee Irwin III
2004-06-04 20:28 ` Andrew Morton
2004-06-07 7:55 ` Anton Blanchard
2004-06-05 7:28 ` Paul Jackson
2004-06-06 8:07 ` Paul Jackson
2004-06-06 8:16 ` William Lee Irwin III
2004-06-05 0:05 ` Paul Jackson
2004-06-05 1:31 ` William Lee Irwin III
2004-06-05 8:04 ` Paul Jackson
2004-06-05 8:26 ` William Lee Irwin III
2004-06-06 8:40 ` Paul Jackson
2004-06-06 12:34 ` Paul Jackson
2004-06-07 16:54 ` fix up compat_sched_[get/set]affinity Joe Korty
2004-06-07 17:07 ` William Lee Irwin III
2004-06-04 5:30 ` [PATCH] cpumask 5/10 rewrite cpumask.h - single bitmap based implementation Paul Jackson
2004-06-04 5:35 ` Nick Piggin
2004-06-04 5:40 ` Andrew Morton
2004-06-04 5:53 ` Nick Piggin
2004-06-04 6:47 ` Paul Jackson
2004-06-04 4:31 ` Paul Jackson
2004-06-04 8:19 ` William Lee Irwin III
2004-06-04 8:43 ` Keith Owens
2004-06-04 9:54 ` William Lee Irwin III
2004-06-04 17:08 ` Paul Jackson
2004-06-09 16:38 ` William Lee Irwin III
2004-06-04 9:14 ` Paul Jackson
2004-06-03 17:10 ` [PATCH] cpumask 6/10 remove 26 no longer used cpumask*.h files Paul Jackson
2004-06-03 17:10 ` [PATCH] cpumask 7/10 remove obsolete cpumask macro uses - i386 arch Paul Jackson
2004-06-03 17:10 ` [PATCH] cpumask 8/10 remove obsolete cpumask macro uses - other archs Paul Jackson
2004-06-03 17:11 ` [PATCH] cpumask 9/10 Remove no longer used obsolete macro emulation Paul Jackson
2004-06-03 17:11 ` [PATCH] cpumask 10/10 optimize various uses of new cpumasks Paul Jackson
2004-06-04 4:27 ` Rusty Russell
2004-06-04 4:40 ` Nick Piggin
2004-06-04 4:51 ` Paul Jackson
2004-06-09 0:09 ` PATCH] cpumask 11/10 comment, spacing tweaks Paul Jackson
-- strict thread matches above, loose matches on Subject: below --
2004-06-06 15:07 [PATCH] cpumask 5/10 rewrite cpumask.h - single bitmap based implementation Mikael Pettersson
2004-06-06 16:44 ` William Lee Irwin III
2004-06-06 17:46 ` Paul Jackson
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