linux-kernel - Re: [PATCH 5/7] PPS: serial clients support.

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Message-ID: <87prsw78qs.fsf@depni.sinp.msu.ru>
Date:	Fri, 11 Apr 2008 18:43:07 +0400
From:	Serge Belyshev <belyshev@...ni.sinp.msu.ru>
To:	Rodolfo Giometti <giometti@...eenne.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Dave Jones <davej@...hat.com>, Sam Ravnborg <sam@...nborg.org>,
	Greg KH <greg@...ah.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Kay Sievers <kay.sievers@...y.org>
Subject: Re: [PATCH 5/7] PPS: serial clients support.

Rodolfo Giometti <giometti@...eenne.com> writes:

> The problem is that deferencing the pps_event() call will cause severe
> problems to PPS accuracy... here you can find some considerations on
> this topic:
>
>    http://ml.enneenne.com/pipermail/linuxpps/2008-April/001738.html
>

What about adding precise timestamping to the lowest possible irq
handling level ( arch/*/entry*.S ) and then export that information
in a general way so it is useful for other applications?
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