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From: Dave Jones <davej@redhat.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: big allocation failure during tracing init.
Date: Wed, 27 Jun 2012 22:22:18 -0400	[thread overview]
Message-ID: <20120628022218.GA30698@redhat.com> (raw)
In-Reply-To: <1340844763.16702.54.camel@gandalf.stny.rr.com>

On Wed, Jun 27, 2012 at 08:52:43PM -0400, Steven Rostedt wrote:
 > On Fri, 2012-06-22 at 15:36 -0400, Dave Jones wrote:
 > 
 > > I guess the problem is on kernels built with CONFIG_MAXCPUS, struct trace_iterator
 > > can be pretty large due to this embedded in it..
 > > 
 > > 	struct ring_buffer_iter *buffer_iter[NR_CPUS];
 > > 
 > > Any thoughts on how to change that to a smaller dynamic data structure,
 > > without adding too much overhead to tracing ? (I'm assuming a linked-list walk
 > > for eg would be excessive?)
 > > 
 > 
 > Does this patch fix it for you?

I'm not sure what I did to trigger the allocation failure last time,
but I'll run with this for a while, and see if anything falls out.

thanks!

	Dave

  reply	other threads:[~2012-06-28  2:22 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-22 19:36 Dave Jones
2012-06-28  0:52 ` Steven Rostedt
2012-06-28  2:22   ` Dave Jones [this message]
2012-06-28  2:58     ` Steven Rostedt

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