Date: Fri, 15 Apr 2016 16:24:41 -0700 From: Ravi Pokala <rpokala@mac.com> To: Warner Losh <imp@bsdimp.com>, Dmitry Morozovsky <marck@rinet.ru> Cc: Ronald Klop <ronald-lists@klop.ws>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, src-committers <src-committers@freebsd.org> Subject: Re: svn commit: r298011 - head/sys/cam/ata Message-ID: <6910F588-DD07-4CBD-A6DA-3A935CCBC8B6@panasas.com> In-Reply-To: <CANCZdfrPrkKf8wX7O%2BkQm1y3iQYTzhJgufLmLS_BBLwWRvp9fw@mail.gmail.com> References: <201604142213.u3EMDklN061064@repo.freebsd.org> <op.yfyvn9epkndu52@sjakie.klop.ws> <65ACB63B-ACDF-4552-BDA9-40FB028EB0D6@bsdimp.com> <alpine.BSF.2.00.1604160044230.76365@woozle.rinet.ru> <CANCZdfrPrkKf8wX7O%2BkQm1y3iQYTzhJgufLmLS_BBLwWRvp9fw@mail.gmail.com>
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-----Original Message----- From: <owner-src-committers@freebsd.org> on behalf of Warner Losh <imp@bsdimp.com> Date: 2016-04-15, Friday at 16:15 To: Dmitry Morozovsky <marck@rinet.ru> Cc: Ronald Klop <ronald-lists@klop.ws>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, src-committers <src-committers@freebsd.org>, Warner Losh <imp@freebsd.org> Subject: Re: svn commit: r298011 - head/sys/cam/ata >... The 60s value has always been nuts since even the largest caches on the slowest drives can be flushed in under a second. ... I'm not so sure about that. I've got an HDD with 256MB cache; even if it were all sequential, flushing that to the media would likely take more than a second. If it were mostly random, it would be well over a second. That said, I agree that a full minute is overkill. -Ravi (rpokala@) >Warner
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