From: Ingo Molnar <mingo@elte.hu>
To: john cooper <john.cooper@timesys.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: MIPS PREEMPT_RT update..
Date: Wed, 9 Nov 2005 12:30:53 +0100 [thread overview]
Message-ID: <20051109113053.GA1012@elte.hu> (raw)
In-Reply-To: <436B85E1.1050103@timesys.com>
* john cooper <john.cooper@timesys.com> wrote:
> As a qualification, I am still chasing a few problems which I suspect
> are related to the Malta patch for 2.6.14 rather than the mips-rt
> patch. One appears to be a TLB handler problem in 2.6.14. The other
> appears to be potentially excessive context switching, although I
> haven't had the opportunity yet to fully investigate this issue. I
> will follow up should resolution of these feed back into generic
> mips-rt support.
FYI, i have released your big MIPS merge as part of 2.6.14-rt9. [please
double-check i did not mis-merge any component]
wrt. your TLB problems: it might be related that TLB handling got
simplified (and sped up) with the introduction of a generic, preemptible
method to handle TLB-gathers. There's no tlb-simple.h anymore.
excessive context-switching might happen in some cases when we ping-pong
short-held locks, and i'm certainly interested in a reproducer or
analysis (or patch! :-).
Ingo
prev parent reply other threads:[~2005-11-09 11:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <436B85E1.1050103@timesys.com>
2005-11-08 20:53 ` Ingo Molnar
2005-11-09 2:30 ` john cooper
2005-11-09 11:30 ` Ingo Molnar [this message]
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