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Re: [glibc] Fix Linux sysconf(_SC_NPROCESSORS_[CONF|ONLN]) performance problem

From: Samuel Thibault <samuel dot thibault at ens-lyon dot org>
To: Ulrich Drepper <drepper at gmail dot com>
Cc: Linus Torvalds <torvalds at linux-foundation dot org>,Roland McGrath <roland at hack dot frob dot com>,"David S. Miller" <davem at davemloft dot net>,Andreas Schwab <schwab at redhat dot com>, libc-alpha at sourceware dot org
Date: Thu, 16 Jun 2011 20:20:48 +0200
Subject: Re: [glibc] Fix Linux sysconf(_SC_NPROCESSORS_[CONF|ONLN]) performance problem
References: <BANLkTi=ousV=JtYzAYEnMVqqX6fnF_1z9Q@mail.gmail.com> <20110616175811.GF5583@const.bordeaux.inria.fr> <BANLkTinbLEcMr6KhUghFBwB3qcGv2UZ5MA@mail.gmail.com> <BANLkTikSMrkhd7zH_7yXPDSUy8YcHR1GWQ@mail.gmail.com>

Ulrich Drepper, le Thu 16 Jun 2011 14:17:27 -0400, a écrit :
> On Thu, Jun 16, 2011 at 14:07, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
> > But the caching is needed, because whatever the process wants, I
> > guarantee that it doesn't want "slow and crappy".
> 
> And how do we find out when the system changes?

BTW, AIX defines a non-standard SIGRECONFIG signal for this.

Samuel

References:
- [glibc] Fix Linux sysconf(_SC_NPROCESSORS_[CONF|ONLN]) performance problem
  - From: Linus Torvalds
- Re: [glibc] Fix Linux sysconf(_SC_NPROCESSORS_[CONF|ONLN]) performance problem
  - From: Samuel Thibault
- Re: [glibc] Fix Linux sysconf(_SC_NPROCESSORS_[CONF|ONLN])performance problem
  - From: Linus Torvalds
- Re: [glibc] Fix Linux sysconf(_SC_NPROCESSORS_[CONF|ONLN])performance problem
  - From: Ulrich Drepper

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