From: "Jan Beulich" <jbeulich@novell.com>
To: Guanqun Lu <guanqun.lu@intel.com>, Kevin Tian <kevin.tian@intel.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
KeirFraser <keir.fraser@eu.citrix.com>
Subject: RE: [PATCH] small adjustment to asm constraintsforc/s19400
Date: Tue, 31 Mar 2009 11:54:34 +0100 [thread overview]
Message-ID: <49D2128A.76E4.0078.0@novell.com> (raw)
In-Reply-To: <0A882F4D99BBF6449D58E61AAFD7EDD61018410D@pdsmsx502.ccr.corp.intel.com>
>>> "Tian, Kevin" <kevin.tian@intel.com> 31.03.09 12:21 >>>
>BTW, another question comes when I'm clearing the code.
>in load_segments, fs/gs base MSRs are only updated for non 32-on-64
>domain. I guess that it's just for performance reason as 32bit guest
>doesn't require to switch gs base. I want to get your confirmation
>since in current low level context S3 resume code, we always restore
>those base MSRs even for 32-on-64 case.
Correct - your code isn't performance sensitive, so keeping it simple is
probably preferable. load_segments() sits in the context switch code, and
thus it tries to avoid things not needed for a particular guest.
Jan
next prev parent reply other threads:[~2009-03-31 10:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-27 16:35 [PATCH] small adjustment to asm constraints for c/s 19400 Jan Beulich
2009-03-30 4:45 ` Lu, Guanqun
2009-03-30 6:42 ` [PATCH] small adjustment to asm constraints for c/s19400 Jan Beulich
2009-03-30 8:58 ` Lu, Guanqun
2009-03-30 8:45 ` [PATCH] small adjustment to asm constraints for c/s 19400 Keir Fraser
2009-03-30 8:56 ` Lu, Guanqun
2009-03-30 9:13 ` [PATCH] small adjustment to asm constraints for c/s19400 Jan Beulich
2009-03-31 8:54 ` Lu, Guanqun
2009-03-31 9:05 ` Tian, Kevin
2009-03-31 9:24 ` [PATCH] small adjustment to asm constraints forc/s19400 Jan Beulich
2009-03-31 9:26 ` Tian, Kevin
2009-03-31 9:40 ` Jan Beulich
2009-03-31 9:47 ` Tian, Kevin
2009-03-31 10:15 ` Jan Beulich
2009-03-31 10:21 ` Tian, Kevin
2009-03-31 10:54 ` Jan Beulich [this message]
2009-03-31 11:09 ` [PATCH] small adjustment to asm constraintsforc/s19400 Tian, Kevin
2009-03-31 11:30 ` Jan Beulich
2009-03-31 11:35 ` Tian, Kevin
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