From: Arnd Bergmann <arnd@arndb.de>
To: Chris Metcalf <cmetcalf@tilera.com>
Cc: virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] arch/tile: add /proc/tile, /proc/sys/tile, and a sysfs cpu attribute
Date: Wed, 25 May 2011 22:34:30 +0200 [thread overview]
Message-ID: <201105252234.30808.arnd@arndb.de> (raw)
In-Reply-To: <4DDD6729.7070201@tilera.com>
On Wednesday 25 May 2011 22:31:37 Chris Metcalf wrote:
> On 5/25/2011 4:20 PM, Arnd Bergmann wrote:
> > On Wednesday 25 May 2011 21:18:05 Chris Metcalf wrote:
> >> The contents of the hardwall ID file are then just a cpulist of the cpus
> >> covered by the hardwall, rather than introducing a new convention (as
> >> quoted above, e.g. "2x2 1,1"). Individual tasks that are in the hardwall
> >> can be found by reading the "hardwall" files, and we can learn where they
> >> are bound in the hardwall by reading the "stat" file as is normal for
> >> learning process affinity.
> > Be careful with listing PID values in the hardwall files, as the PIDs
> > may not be unique or visible if you combine this with PID name spaces.
> > I guess the right solution would be to only list the tasks that are
> > present in the name space of the thread reading the file.
>
> Sorry not to be clearer -- I am no longer listing any PID values in the
> hardwall files, for that exact reason. You have to look at
> /proc/*/hardwall (or /proc/*/tasks/*/hardwall) to find the files that are
> in a particular hardwall. This pattern is not one that's normally directly
> useful, though, so I'm happy leaving it to userspace if it's desired.
Ok, thanks for the clarification.
Arnd
next prev parent reply other threads:[~2011-05-25 20:34 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-20 5:43 [PATCH] arch/tile: new multi-core architecture for Linux Chris Metcalf
2010-05-20 8:04 ` Barry Song
2010-05-20 14:32 ` Linus Torvalds
2010-05-20 19:10 ` Chris Metcalf
2010-05-21 4:52 ` Barry Song
2010-05-21 15:13 ` Chris Metcalf
2010-05-20 19:12 ` [PATCH] generic: make lowmem_page_address() use PFN_PHYS() for improved portability Chris Metcalf
2010-05-22 4:05 ` [PATCH] arch/tile: new multi-core architecture for Linux Chris Metcalf
2010-05-23 22:08 ` Arnd Bergmann
2010-05-24 15:29 ` Chris Metcalf
2010-05-24 18:53 ` Arnd Bergmann
2010-05-24 21:29 ` Chris Metcalf
2010-05-25 13:54 ` Chris Metcalf
2010-05-25 15:03 ` Arnd Bergmann
2010-05-25 15:13 ` Chris Metcalf
2010-05-25 15:30 ` Arnd Bergmann
2010-05-26 2:44 ` liqin.chen
2010-05-26 13:45 ` Chris Metcalf
[not found] ` <4BFBE005.2070500@tilera.com>
[not found] ` <201005251721.23782.arnd@arndb.de>
2010-05-26 23:05 ` Chris Metcalf
2010-05-26 5:02 ` Paul Mundt
2010-05-25 21:45 ` Arnd Bergmann
2010-05-27 0:58 ` Chris Metcalf
2010-05-27 8:41 ` Arnd Bergmann
2010-05-27 13:30 ` Chris Metcalf
2010-05-27 13:41 ` Geert Uytterhoeven
2010-05-27 13:48 ` Paul Mundt
2010-05-27 14:11 ` Arnd Bergmann
2010-05-27 14:35 ` Chris Metcalf
2010-05-27 15:02 ` Arnd Bergmann
2010-05-27 15:04 ` Chris Metcalf
2010-05-27 15:20 ` Arnd Bergmann
2010-05-27 14:52 ` Marc Gauthier
2010-05-28 17:58 ` Chris Metcalf
2010-05-27 15:03 ` Chris Metcalf
2010-05-27 20:34 ` Jamie Lokier
2010-05-27 20:53 ` Arnd Bergmann
2010-05-28 16:45 ` Chris Metcalf
2010-05-28 17:16 ` Arnd Bergmann
2010-05-28 17:28 ` Chris Metcalf
2011-05-16 18:23 ` [PATCH] arch/tile: support signal "exception-trace" hook Chris Metcalf
2011-05-18 18:14 ` Chris Metcalf
2011-05-17 20:26 ` [PATCH] arch/tile: add /proc/tile, /proc/sys/tile, and a sysfs cpu attribute Chris Metcalf
2011-05-19 13:41 ` Arnd Bergmann
2011-05-19 15:12 ` Chris Metcalf
2011-05-19 15:22 ` Arnd Bergmann
2011-05-20 14:26 ` Chris Metcalf
2011-05-20 14:37 ` Arnd Bergmann
2011-05-20 15:00 ` Chris Metcalf
2011-05-20 15:13 ` Arnd Bergmann
2011-05-20 19:59 ` Arnd Bergmann
2011-05-25 19:18 ` Chris Metcalf
2011-05-25 20:20 ` Arnd Bergmann
2011-05-25 20:31 ` Chris Metcalf
2011-05-25 20:34 ` Arnd Bergmann [this message]
2011-05-24 15:38 ` Arnd Bergmann
2011-05-26 16:40 ` [PATCH v2] arch/tile: more /proc and /sys file support Chris Metcalf
2011-05-27 14:23 ` Arnd Bergmann
2010-05-24 20:22 ` [PATCH] arch/tile: new multi-core architecture for Linux Sam Ravnborg
2010-05-24 21:30 ` Chris Metcalf
2010-05-25 5:02 ` Sam Ravnborg
2010-05-25 20:12 ` Thomas Gleixner
2010-05-26 1:57 ` Chris Metcalf
2010-05-26 16:22 ` Chris Metcalf
2010-05-26 17:09 ` Arnd Bergmann
2010-05-29 3:01 ` [PATCH 1/8] Fix up the "generic" unistd.h ABI to be more useful Chris Metcalf
2010-05-29 3:09 ` [PATCH 2/8] arch/tile: infrastructure and configuration-related files Chris Metcalf
2010-05-31 7:47 ` Paul Mundt
2010-06-03 17:54 ` Chris Metcalf
2010-05-29 3:10 ` [PATCH 3/8] arch/tile: header files for the Tile architecture Chris Metcalf
2010-05-31 2:58 ` FUJITA Tomonori
2010-06-03 21:32 ` [PATCH] arch/tile: respond to reviews of the second code submission Chris Metcalf
2010-06-04 0:50 ` Paul Mundt
2010-06-04 1:31 ` FUJITA Tomonori
2010-06-07 5:25 ` FUJITA Tomonori
2010-05-29 3:10 ` [PATCH 4/8] arch/tile: core kernel/ code Chris Metcalf
2010-05-31 2:58 ` FUJITA Tomonori
2010-05-29 3:11 ` [PATCH 5/8] arch/tile: the kernel/tile-desc_32.c file Chris Metcalf
2010-05-29 3:13 ` [PATCH 6/8] arch/tile: the mm/ directory Chris Metcalf
2010-05-29 3:16 ` [PATCH 7/8] arch/tile: lib/ directory Chris Metcalf
2010-05-29 3:17 ` [PATCH 8/8] arch/tile: hypervisor console driver Chris Metcalf
2010-05-29 3:20 ` [PATCH 0/8] revised patch for arch/tile/ support Chris Metcalf
2010-05-29 11:29 ` Arnd Bergmann
2010-06-03 20:40 ` Arnd Bergmann
2010-06-03 21:48 ` Chris Metcalf
2010-06-04 21:32 ` Chris Metcalf
2010-06-05 12:56 ` Stephen Rothwell
2010-06-05 13:30 ` Chris Metcalf
2010-06-05 14:10 ` Stephen Rothwell
[not found] ` <dVZMmBu$KHA.5388@exchange1.tad.internal.tilera.com>
2010-05-29 3:20 ` Chris Metcalf
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