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Date: Fri, 8 Jan 2010 15:46:26 -0600 (CST) From: Christoph Lameter <cl@...ux-foundation.org> To: Linus Torvalds <torvalds@...ux-foundation.org> cc: Peter Zijlstra <peterz@...radead.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Minchan Kim <minchan.kim@...il.com>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "hugh.dickins" <hugh.dickins@...cali.co.uk>, Nick Piggin <nickpiggin@...oo.com.au>, Ingo Molnar <mingo@...e.hu> Subject: Re: [RFC][PATCH 6/8] mm: handle_speculative_fault() On Fri, 8 Jan 2010, Linus Torvalds wrote: > We worried about the effects of fair spinlocks when introducing the ticket > locks, but nobody ever actually had a load that seemed to indicate it made > much of a difference, and we did have a few cases where starvation was a > very noticeable problem. And I made the point that starvation was a hardware issue due to immature cacheline handling. Now the software patchup job for the hardware breakage is causing regressions for everyone. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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