Thread (36 messages) 36 messages, 14 authors, 2010-02-08

Re: linux-next: add utrace tree

From: Frederic Weisbecker <hidden>
Date: 2010-01-27 16:01:13
Also in: lkml

Possibly related (same subject, not in this thread)

On Wed, Jan 27, 2010 at 03:04:58AM -0800, Linus Torvalds wrote:

On Wed, 27 Jan 2010, Peter Zijlstra wrote:
quoted
Right, so there's two aspects:

 1) concurrency when inserting the probe
That's the one I worried about. Stopping all threads will fix it, 
obviously at a disastrous performance cost, but what do I care? As noted, 
there are ways to do it safely with TLB switching, so it's fixable.

That said, inserting a probe is supposed to be a pretty rare
operation, stopping all threads in a process shouldn't be
painful for this aspect.
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