[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [PATCH] remove VHPT_ADDR (was Re: [Xen-ia64-devel] [PATCH] per vcpu vhpt)
Hi Isaku, Does this patch work? Is it for checkin or review? Anthony >-----Original Message----- >From: Isaku Yamahata [mailto:yamahata@xxxxxxxxxxxxx] >Sent: 2006年10月11日 10:51 >To: Xu, Anthony >Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx >Subject: [PATCH] remove VHPT_ADDR (was Re: [Xen-ia64-devel] [PATCH] per vcpu >vhpt) > >Hi. I dig out the old patch and updated it. > >On Tue, Oct 10, 2006 at 09:31:26AM +0800, Xu, Anthony wrote: >> >> >> >non-current vcpu's case must be handled. >> >> I don't see any issue here, if we use option1, we use identity >> mapping >> >> for VHPT, and so we can use 16 MB TR mapping, of cause, 64KB VHPT is >> >> covered by this 16M TR. >> > >> >In fact I had such a patch for the very early version of >> >the pervcpu vhpt patch. >> >But I discarded it for some reason. I don't remember clearly why. >> >Probably I wanted to avoid introducing an implicit dependency >> >and increasing vcpu context switch overhead. >> >> As I know, IA64/LINUX is using this mechanism, the task_struct is 32k, >> but it uses 16M TR mapping if it is not covered 64M kernel TR. >> >> Anthony >> >> >> > >> >-- >> >yamahata >> >> _______________________________________________ >> Xen-ia64-devel mailing list >> Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx >> http://lists.xensource.com/xen-ia64-devel > >-- >yamahata _______________________________________________ Xen-ia64-devel mailing list Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-ia64-devel
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