Date: Sat, 18 Sep 2010 16:38:52 +0200 From: Daan Vreeken <Daan@vehosting.nl> To: Alexander Motin <mav@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r212541 - in head/sys: amd64/amd64 amd64/include dev/acpica i386/i386 i386/include kern mips/include mips/mips pc98/pc98 powerpc/aim powerpc/booke powerpc/include powerpc/powerpc sparc6... Message-ID: <201009181638.53234.Daan@vehosting.nl> In-Reply-To: <4C94C31C.6080102@FreeBSD.org> References: <201009130725.o8D7PZX8073399@svn.freebsd.org> <201009181234.17851.Daan@vehosting.nl> <4C94C31C.6080102@FreeBSD.org>
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Hi, On Saturday 18 September 2010 15:48:12 Alexander Motin wrote: > Hi. > > Daan Vreeken wrote: > > On Monday 13 September 2010 09:25:35 Alexander Motin wrote: > >> Author: mav > >> Date: Mon Sep 13 07:25:35 2010 > >> New Revision: 212541 > >> URL: http://svn.freebsd.org/changeset/base/212541 > >> > >> Log: > >> Refactor timer management code with priority to one-shot operation > >> mode. The main goal of this is to generate timer interrupts only when > >> there is some work to do. When CPU is busy interrupts are generating at > >> full rate of hz + stathz to fullfill scheduler and timekeeping > >> requirements. But when CPU is idle, only minimum set of interrupts (down > >> to 8 interrupts per second per CPU now), needed to handle scheduled > >> callouts is executed. This allows significantly increase idle CPU sleep > >> time, increasing effect of static power-saving technologies. Also it > >> should reduce host CPU load on virtualized systems, when guest system is > >> idle. > > > > [snip] > > > > When re-basing an ARM system running an older -current with local > > patches/additions to a more recent version of -current (around > > 2010-09-16-ish) I found out that the resulting kernel stopped booting. > > To factor out our local changes I've tried to boot a 'SHEEVAPLUG' kernel > > without modifications. This kernel also fails to boot. It just stops > > right after : > > > > Can you perhaps tell me what's going wrong after this commit? > > (If you need more info, I'd be happy to provide it where I can.) > > Sorry. Timer interrupt loss in one-shot mode made timer to not reload. > r212823 fixes this problem for me. Yes, that fixed it. Thanks for the quick fix! Regards, -- Daan Vreeken VEHosting http://VEHosting.nl tel: +31-(0)40-7113050 / +31-(0)6-46210825 KvK nr: 17174380
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