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]
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