From: fche@redhat.com (Frank Ch. Eigler)
To: prasanna@in.ibm.com
Cc: Arjan van de Ven <arjan@infradead.org>,
Andrew Morton <akpm@osdl.org>, Andi Kleen <ak@suse.de>,
davem@davemloft.net, suparna@in.ibm.com,
richardj_moore@uk.ibm.com, linux-kernel@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>,
"Theodore Ts'o" <tytso@mit.edu>,
Nick Piggin <nickpiggin@yahoo.com.au>
Subject: Re: RFC - Approaches to user-space probes
Date: 28 Mar 2006 15:35:43 -0500 [thread overview]
Message-ID: <y0m64lye28w.fsf@ton.toronto.redhat.com> (raw)
In-Reply-To: <20060328145441.GA25465@in.ibm.com>
Prasanna S Panchamukhi <prasanna@in.ibm.com> writes:
> [...]
> If the executable is mmaped shared, then those mappings will get written
> back to the disk.
> Writting to the disk is not the requirement for user-space probes, it is
> just the side effect [...]
It's pretty clear that writing the dirtied pages to disk is an
*undesirable* side-effect, and should be eliminated. (Among many
other scenarios, imagine a kernel shutting down without all the probes
being cleanly removed. Then the executables are irretrievably
corrupted.)
- FChE
next prev parent reply other threads:[~2006-03-28 20:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-27 6:54 Prasanna S Panchamukhi
2006-03-27 7:37 ` Arjan van de Ven
2006-03-27 10:00 ` Prasanna S Panchamukhi
2006-03-27 20:03 ` Arjan van de Ven
2006-03-28 9:42 ` Richard J Moore
2006-03-28 9:47 ` Andi Kleen
2006-03-28 10:10 ` Richard J Moore
2006-03-28 14:54 ` Prasanna S Panchamukhi
2006-03-28 17:29 ` Arjan van de Ven
2006-03-28 20:35 ` Frank Ch. Eigler [this message]
2006-03-28 20:44 ` Andi Kleen
2006-03-31 11:55 ` Prasanna S Panchamukhi
2006-03-31 16:25 ` Frank Ch. Eigler
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