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Date: Fri, 13 Apr 2007 13:13:48 +0100 From: Christoph Hellwig <hch@...radead.org> To: David Howells <dhowells@...hat.com> Cc: Nick Piggin <npiggin@...e.de>, Andrew Morton <akpm@...ux-foundation.org>, Andi Kleen <ak@...e.de>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Linux Memory Management List <linux-mm@...ck.org>, Linus Torvalds <torvalds@...ux-foundation.org> Subject: Re: [patch] generic rwsems On Fri, Apr 13, 2007 at 12:44:50PM +0100, David Howells wrote: > Nick Piggin <npiggin@...e.de> wrote: > > > I think I should put wait_lock after wait_list, so as to get a better > > packing on most 64-bit architectures. > > It makes no difference. struct lockdep_map contains at least one pointer and > so is going to be 8-byte aligned (assuming it's there at all). struct > rw_semaphore contains at least one pointer/long, so it will be padded out to > 8-byte size. I hope people are not going to enabled lockdep on their production systems :) - 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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