linux-kernel - RE: [PATCH 1/1] staging: hv: Add Time Sync feature to hv

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Message-ID: <1273111147.1735.90.camel@Joe-Laptop.home>
Date:	Wed, 05 May 2010 18:59:07 -0700
From:	Joe Perches <joe@...ches.com>
To:	Haiyang Zhang <haiyangz@...rosoft.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
	"virtualization@...ts.osdl.org" <virtualization@...ts.osdl.org>,
	"gregkh@...e.de" <gregkh@...e.de>,
	Hank Janssen <hjanssen@...rosoft.com>
Subject: RE: [PATCH 1/1] staging: hv: Add Time Sync feature to hv_utils
 module

On Thu, 2010-05-06 at 01:42 +0000, Haiyang Zhang wrote:
> > Why a maximum of 50 samples?
> After reboot the flag ICTIMESYNCFLAG_SYNC is included in the 
> first time message after the timesync channel is opened. Since the 
> hv_utils module is loaded after hv_vmbus, the first message is usually
> missed. The other thing is, systime is automatically set to emulated 
> hardware clock which may not be UTC time or the same time 
> zone. So, to override these effects, we use the first 50 time samples 
> for initial system time setting.

I suggest putting that in a commit message or a code comment.

cheers, Joe


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