Messages in this thread | | | From | David Mosberger <> | Date | Fri, 24 Oct 2003 15:01:02 -0700 | Subject | Re: [PATCH 2.4.23-pre8] Remove broken prefetching in free_one_pgd() |
| |
>>>>> On Fri, 24 Oct 2003 13:56:31 -0700, "Luck, Tony" <tony.luck@intel.com> said:
Tony> This patch was accepted into 2.5.55, attributed to "davej@uk". Tony> This code will prefetch from beyond the end of the page table Tony> being cleared ... which is clearly a bad thing if the page Tony> table in question is allocated from the last page of memory Tony> (or precedes a hole on a discontig mem system).
Different arches behave differently, though. In the case of ia64, it'a always safe to prefetch (even with lfetch.fault).
--david - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |