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Message-Id: <1175808567.15973.137.camel@imap.mvista.com> Date: Thu, 05 Apr 2007 14:29:27 -0700 From: Daniel Walker <dwalker@...sta.com> To: john stultz <johnstul@...ibm.com> Cc: linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, mingo@...e.hu Subject: Re: [PATCH] timekeeping: drop irq-context clocksource polling On Thu, 2007-04-05 at 14:25 -0700, john stultz wrote: > On Thu, 2007-04-05 at 14:03 -0700, Daniel Walker wrote: > > Before this change the timekeeping code would poll the clocksource > > list every interrupt. This changes that so the clocksource list is > > only checked when there has been and update, and no longer checks > > in interrupt context. > > > > This also has a few small space and line cleanups. > > > > Boot tested on i386, compile tested on x86_64 .. However, I couldn't > > find a !GENERIC_TIME that compiled without this change so it's untested.. > > > > Signed-Off-By: Daniel Walker <dwalker@...sta.com> > > Err.. I think you need to be holding a write on the xtime_lock (as is > done before calling update_wall_time()) when changing the clocksource. I added a write_seqlock_irqsave() on xtime_lock in change_clocksource() .. Did I need more (different) protection than that? Daniel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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