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Message-Id: <20070319155228.00b0d875.dada1@cosmosbay.com> Date: Mon, 19 Mar 2007 15:52:28 +0100 From: Eric Dumazet <dada1@...mosbay.com> To: Oleg Nesterov <oleg@...sign.ru> Cc: Andrew Morton <akpm@...ux-foundation.org>, linux kernel <linux-kernel@...r.kernel.org> Subject: Re: [PATCH, take3] getrusage() : Fill ru_inblock and ru_oublock fields if possible On Mon, 19 Mar 2007 17:37:23 +0300 Oleg Nesterov <oleg@...sign.ru> wrote: > (offtopic) Well..., it *is* ontopic I'm afraid... > > We are reading u64 read_bytes/write_bytes which could be updated asynchronously. > /proc/pid/io does the same. > > Of course, I don't blame this patch, just a stupid question: can we do something? > I guess not. We could do a proper thing with a seqlock (only needed on 32bit arches) See for example what is done for i_size in struct inode, with i_size_seqcount Eric - 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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