Re: [PATCH, take3] getrusage() : Fill ru_inblock and ru_oublockfields if possible

[Eric Dumazet]

On Mon, 19 Mar 2007 17:37:23 +0300
Oleg Nesterov <oleg@xxxxxxxxxx> 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
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