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Date: Mon, 22 Feb 2010 14:00:52 -0800 (PST) From: David Rientjes <rientjes@...gle.com> To: Nick Piggin <npiggin@...e.de> cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, Miao Xie <miaox@...fujitsu.com>, Lee Schermerhorn <lee.schermerhorn@...com> Subject: Re: [regression] cpuset,mm: update tasks' mems_allowed in time (58568d2) On Mon, 22 Feb 2010, Nick Piggin wrote: > If you have a concurrent reader without any synchronisation, then what > stops it from loading a word of the mask before stores to add the new > nodes and then loading another word of the mask after the stores to > remove the old nodes? (which can give an empty mask). > Currently nothing, so we'll need a variant for configurations where the size of nodemask_t is larger than we can atomically store. -- 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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