Date: Wed, 03 Jul 2013 12:11:42 +0800 From: Julian Elischer <julian@freebsd.org> To: John Baldwin <jhb@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r252346 - head/share/man/man9 Message-ID: <51D3A47E.7070705@freebsd.org> In-Reply-To: <51D2F915.2070303@FreeBSD.org> References: <201306281633.r5SGXjFU017827@svn.freebsd.org> <51CEDE2B.60204@freebsd.org> <51CEE326.2010903@freebsd.org> <51D2F915.2070303@FreeBSD.org>
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On 7/3/13 12:00 AM, John Baldwin wrote: > On 6/29/13 6:37 AM, Julian Elischer wrote: >> On 6/29/13 9:16 PM, Julian Elischer wrote: >>> thanks! >>> >>> >>>> -If the owner is not currently actually running then the spin step is >>>> skipped. >>>> +then a thread attempting to acquire the mutex will spin rather than >>>> yielding >>>> +the processor. >> Am I wrong in thinking that it will only spin for a short while, >> eventually yielding? >> >> The original text said this but the new text implies it will spin forever. > It does not use a spin timeout. I considered adding a separate note to > define adaptive spinning generically as it is used by multiple lock > types (mutexes, rwlocks, and sx locks). this would be a good idea. >
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