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From: "Jan Beulich" <jbeulich@novell.com>
To: Atsushi SAKAI <sakaia@jp.fujitsu.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: [PATCH] Fix clock_gettime to increment monotonically onPV-domain/x86
Date: Fri, 15 Jun 2007 12:19:17 +0200	[thread overview]
Message-ID: <467283C5.76E4.0078.0@novell.com> (raw)
In-Reply-To: <200706150948.l5F9mWQ6004763@fjmscan501.ms.jp.fujitsu.com>

I'm afraid this isn't MP-safe - you're in a (pseudo-)read-locked section of code,
yet write a global variable (and even in two pieces). Jan

>>> Atsushi SAKAI <sakaia@jp.fujitsu.com> 15.06.07 11:47 >>>
Hi, Keir

  This patch intends to increment do_gettimeofday monotonically.
This is for PV-domain/x86.

Signed-off-by: Atsushi SAKAI <sakaia@jp.fujitsu.com>

By applying patch, the time rollback for SMP is fixed.
This is important fixes for database software.

Thanks
Atsushi SAKAI

  reply	other threads:[~2007-06-15 10:19 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-15  9:47 [PATCH] Fix clock_gettime to increment monotonically on PV-domain/x86 Atsushi SAKAI
2007-06-15 10:19 ` Jan Beulich [this message]
2007-06-15 10:26   ` [PATCH] Fix clock_gettime to increment monotonically onPV-domain/x86 Keir Fraser
2007-06-15 11:12     ` Jan Beulich
2007-06-15 11:19       ` Keir Fraser
2007-06-15 12:47       ` John Levon
2007-06-15 12:59         ` Keir Fraser
2007-06-15 13:08           ` John Levon
2007-06-15 13:21             ` Keir Fraser
2007-06-15 14:00               ` John Levon
2007-06-15 14:18                 ` Keir Fraser
2007-06-15 14:32                   ` John Levon
2007-06-15 13:58             ` [PATCH] Fix clock_gettime to increment monotonicallyonPV-domain/x86 Atsushi SAKAI
2007-06-15 11:44     ` [PATCH] Fix clock_gettime to incrementmonotonically onPV-domain/x86 Atsushi SAKAI
2007-06-19  9:21       ` [PATCH] Fix clock_gettime to incrementmonotonicallyonPV-domain/x86 Atsushi SAKAI

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