From: Al Viro <viro@ZenIV.linux.org.uk>
To: Nathan Zimmer <nzimmer@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org
Subject: Re: [RFC 0/2] /proc/sched_stat and /proc/sched_debug fail at 4096
Date: Wed, 7 Nov 2012 00:37:57 +0000 [thread overview]
Message-ID: <20121107003757.GM2616@ZenIV.linux.org.uk> (raw)
In-Reply-To: <1352235741-26478-1-git-send-email-nzimmer@sgi.com>
On Tue, Nov 06, 2012 at 03:02:19PM -0600, Nathan Zimmer wrote:
> When running with 4096 cores attemping to read /proc/sched_stat and
> /proc/sched_debug will fail with an ENOMEM condition.
> On a sufficantly large systems the total amount of data is more then 4mb, so
> it won't fit into a single buffer.
Not a bad idea, but the iterator is wrong - it assumes that CPU 0 is always
online, AFAICS. Header should be handled separately - see my reply to
davej several hours ago.
prev parent reply other threads:[~2012-11-07 0:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-06 21:02 [RFC 0/2] /proc/sched_stat and /proc/sched_debug fail at 4096 Nathan Zimmer
2012-11-06 21:02 ` [RFC 1/2] procfs: /proc/sched_stat fails on very very large machines Nathan Zimmer
2012-11-06 21:02 ` [RFC 2/2] procfs: /proc/sched_debug " Nathan Zimmer
2012-11-06 21:31 ` Dave Jones
2012-11-06 23:24 ` Nathan Zimmer
2012-11-06 23:49 ` Dave Jones
2012-11-07 15:58 ` Nathan Zimmer
2012-11-07 0:37 ` Al Viro [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20121107003757.GM2616@ZenIV.linux.org.uk \
--to=viro@zeniv.linux.org.uk \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=nzimmer@sgi.com \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.