Date: Tue, 02 Jul 2013 09:00:21 -0700 From: John Baldwin <jhb@FreeBSD.org> To: Julian Elischer <julian@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: <51D2F915.2070303@FreeBSD.org> In-Reply-To: <51CEE326.2010903@freebsd.org> References: <201306281633.r5SGXjFU017827@svn.freebsd.org> <51CEDE2B.60204@freebsd.org> <51CEE326.2010903@freebsd.org>
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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). -- John Baldwin
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