Messages in this thread | | | Date | Thu, 8 May 2014 14:41:21 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH v1 03/11] perf: Allow for multiple ring buffers per event |
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On Thu, May 08, 2014 at 03:34:17PM +0300, Alexander Shishkin wrote: > Peter Zijlstra <peterz@infradead.org> writes: > > > So the aux_head/tail values should also be in the file space and not > > start at 0 again, similar for the offsets in the AUX record. > > Thinking some more about it: if we keep aux_{offset,size} in userpg, > then it would make sense to have aux_{head,tail} run from 0 to infinity > similar to data_{head,tail}, especially considering that neither data_* > nor aux_* pointers are file offsets anyway.
Yeah, this might make it easier. So then the rule is *_offset + *_{head,tail} is the actual file offset into the buffer. [unhandled content-type:application/pgp-signature] | |