Hi, On Wed, 2015-06-10 at 17:32 +0530, Anshuman Khandual wrote: > On 06/10/2015 08:51 AM, Daniel Axtens wrote: > > Hi Anshuman, > > > > Was there a cover letter for this series that I missed? > > This is the continuation (rebased and reworked) of the series > posted at https://lkml.org/lkml/2014/5/5/153 (which is V6). I > remember to have incremented the count for the re-send of the > first four patches of the series to Peter Z for generic review > which got pulled in last year. These patches here are the > remaining powerpc part of the original series. Will list down > the current changes as well next time around along with the new > ones. > > > > > On Mon, 2015-06-08 at 17:08 +0530, Anshuman Khandual wrote: > >> BHRB is a rolling buffer. Hence we might end up in a situation where > > Could you spell out what BHRB stands for? > > Branch History Rolling Buffer, would you like to have that in the > commit message as well ? Yes please. > > > > >> we have read one target address but when we try to read the next entry > >> indicating the from address of the targe, the buffer just overflows. > > target? > > Yeah its target address. Ok, I was just trying to point out the spelling mistake above. > > > > >> In this case, the captured from address will be zero which indicates > >> the end of the buffer. > >> > > In what sort of situations would this occur? It seems like something we > > would want to avoid if possible? > > Its not avoidable. During regular flow of branch recording, the HW would > have written both the records correctly but then the new ones came in and > we just happen to loose one of them causing this situation. OK.
Regards, Daniel
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