linux-kernel - Re: [PATCHv6 00/16] pps: several fixes and improvements

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Message-ID: <20101218040001.7b4a1bc0@apollo.gnet>
Date:	Sat, 18 Dec 2010 04:00:01 +0300
From:	Alexander Gordeev <lasaine@....cs.msu.su>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	"Nikita V\. Youshchenko" <yoush@...msu.su>,
	linuxpps@...enneenne.com, Rodolfo Giometti <giometti@...eenne.com>
Subject: Re: [PATCHv6 00/16] pps: several fixes and improvements

В Fri, 17 Dec 2010 16:19:38 -0800
Andrew Morton <akpm@...ux-foundation.org> пишет:

> On Fri, 17 Dec 2010 22:54:24 +0300
> Alexander Gordeev <lasaine@....cs.msu.su> wrote:
> 
> > There is one problem however: kernel consumer works bad (if enabled)
> > when CONFIG_NO_HZ is enabled. The reason for this is commit
> > a092ff0f90cae22b2ac8028ecd2c6f6c1a9e4601. Without it hardpps() is able
> > to sync to 1us precision in about 10 seconds. With CONFIG_NO_HZ it is
> > not syncing at all. This only affects patches 12-14, others are ok.
> 
> Is someone working on fixing all this?

Not right now but it is planned. I can only ensure that users can never
select CONFIG_NO_HZ and CONFIG_NTP_PPS at the same time. Is it ok?

-- 
  Alexander

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