Date: Thu, 1 Jun 2006 08:54:16 -0400 From: John Baldwin <jhb@freebsd.org> To: Gleb Smirnoff <glebius@freebsd.org> Cc: cvs-src@freebsd.org, Scott Long <scottl@samsco.org>, src-committers@freebsd.org, Warner Losh <imp@freebsd.org>, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/dev/syscons/apm apm_saver.c src/sys/i386/bios apm.c apm.h Message-ID: <200606010854.17990.jhb@freebsd.org> In-Reply-To: <20060601042747.GX27819@FreeBSD.org> References: <200605252306.k4PN6cCS081708@repoman.freebsd.org> <200605311123.02334.jhb@freebsd.org> <20060601042747.GX27819@FreeBSD.org>
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On Thursday 01 June 2006 00:27, Gleb Smirnoff wrote: > On Wed, May 31, 2006 at 11:23:01AM -0400, John Baldwin wrote: > J> Nah, that was phk's other timekeeping code to see which timeouts take a long > J> time to execute. The THREAD_NO_SLEEPING() stuff was added just before 6.0 > J> was released and replaced a couple of "special" mutexes that were held just > J> to provoke WITNESS warnings. > > To take a long time to execute one doesn't need to sleep, it can also do > a lot of job. Yes, but sleeping in softclock leads to deadlock much more quickly than a long-running callout. -- John Baldwin
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