On Fri, 2006-04-07 at 12:37 +0100, Tristan Gingold wrote:
> Hi,
>
> thank you for all the discussion about ptc.ga for SMP-g.
> Here is the last patch.
>
> Tested within SMP-g frame by compiling on domU (4+1+1 cpus)
> Tested by boot+halt of dom0+domU.
Applied.
--
Alex Williamson
On Fri, Mar 31, 2006 at 09:35:23AM +0100, Tristan Gingold wrote:
> Le Vendredi 31 Mars 2006 08:15, Isaku Yamahata a écrit :
> [...]
> > > The IA64_GRANULE_SIZE (16M/64M) area covering current kernel stack
> > > is also mapped by TR. Except for init_task, all kernel stacks are
> > > dynamically allo
Le Vendredi 31 Mars 2006 08:15, Isaku Yamahata a écrit :
[...]
> > The IA64_GRANULE_SIZE (16M/64M) area covering current kernel stack
> > is also mapped by TR. Except for init_task, all kernel stacks are
> > dynamically allocated from identity mapping area. So if stack of current
> > running task h
Le Vendredi 31 Mars 2006 03:23, Isaku Yamahata a écrit :
> On Thu, Mar 30, 2006 at 03:58:21PM +0100, Tristan Gingold wrote:
> > Le Jeudi 30 Mars 2006 16:17, Isaku Yamahata a écrit :
> > > On Thu, Mar 30, 2006 at 04:59:35PM +0800, Xu, Anthony wrote:
> > > > There seems no issue, because vcpu_purge_t
Hi Kevin. Thank you for clarification.
On Fri, Mar 31, 2006 at 01:41:51PM +0800, Tian, Kevin wrote:
> Let's make some clarification here:
>
> For IA64 linux, KERNEL_START records start of kernel image which is in
> region 5 for 2.6 kernel while in region 7 for 2.4 kernel. PAGE_OFFSET is
> sta
d
>Subject: RE: [Xen-ia64-devel] Re: [PATCH]: ptc.ga for SMP-g
>
>>From: Isaku Yamahata [mailto:[EMAIL PROTECTED]
>>Sent: 2006年3月31日 10:53
>>It's right that Linux/ia64 kernel text and statically allocated data
>>are in [0xa001, ...].
>>Ho
>From: Isaku Yamahata [mailto:[EMAIL PROTECTED]
>Sent: 2006年3月31日 10:53
>It's right that Linux/ia64 kernel text and statically allocated data
>are in [0xa001, ...].
>However dynamically allocated pages's virtual address are in
>the area of [PAGE_OFFSET, ...].
Dynamically allocated page
On Fri, Mar 31, 2006 at 10:42:13AM +0800, Xu, Anthony wrote:
> >From: Isaku Yamahata >Sent: 2006年3月31日 9:23
> >> PAGE_OFFSET + 64MB is covered by a tr, isn't it ?
> >
> >[PAGE_OFFSET, PAGE_OFFSET + KERNEL_TR_PAGE_SIZE - 1] is covered.
> >Here KERNEL_TR_PAGE_SIZE = 64MB which is defined
> >in linux/
>From: Isaku Yamahata >Sent: 2006年3月31日 9:23
>> PAGE_OFFSET + 64MB is covered by a tr, isn't it ?
>
>[PAGE_OFFSET, PAGE_OFFSET + KERNEL_TR_PAGE_SIZE - 1] is covered.
>Here KERNEL_TR_PAGE_SIZE = 64MB which is defined
>in linux/asm-ia64/pgtable.h.
>
>For safety, please consider
>PAGE_OFFSET + KERNEL_
>From: Isaku Yamahata>Sent: 2006?3?30? 22:18
>To: Xu, Anthony
>Cc: Tristan Gingold; xen-ia64-devel@lists.xensource.com
>Subject: Re: [Xen-ia64-devel] Re: [PATCH]: ptc.ga for SMP-g
>
>Page not present fault is different from tlb miss fault.
>So guest OS may handle them d
On Thu, Mar 30, 2006 at 03:58:21PM +0100, Tristan Gingold wrote:
> Le Jeudi 30 Mars 2006 16:17, Isaku Yamahata a écrit :
> > On Thu, Mar 30, 2006 at 04:59:35PM +0800, Xu, Anthony wrote:
> > > There seems no issue, because vcpu_purge_tr_entry() only sets ->p=0.
> > > In some cases, this patch may ca
Le Jeudi 30 Mars 2006 16:17, Isaku Yamahata a écrit :
> On Thu, Mar 30, 2006 at 04:59:35PM +0800, Xu, Anthony wrote:
> > There seems no issue, because vcpu_purge_tr_entry() only sets ->p=0.
> > In some cases, this patch may cause a not-present tlb inserted into
> > machine TLB, this is harmless, wh
On Thu, Mar 30, 2006 at 04:59:35PM +0800, Xu, Anthony wrote:
> There seems no issue, because vcpu_purge_tr_entry() only sets ->p=0.
> In some cases, this patch may cause a not-present tlb inserted into machine
> TLB, this is harmless, when guest accesses this page, page not present fault
> happe
>From: Tristan Gingold [mailto:[EMAIL PROTECTED]
>Sent: 2006年3月30日 17:25
>For sure, this is almost the safest. But there is still a race-condition: if
>vcpu migrates during the IPI, the tlb can be modified by two cpus.
So first, you need hint to indicate which domain ptc.g emulation happens
on.
Le Jeudi 30 Mars 2006 11:08, Tian, Kevin a écrit :
> From: Tristan Gingold [mailto:[EMAIL PROTECTED]
>
> >Sent: 2006年3月30日 16:56
> >
> >> >Can you elaborate ? Do you have a disaster scenario ?
> >> >vcpu_purge_tr_entry only clears the p bit.
> >>
> >> I think it's not safe for one vcpu to operate d
>From: Tristan Gingold [mailto:[EMAIL PROTECTED]
>Sent: 2006年3月30日 16:56
>
>> >Can you elaborate ? Do you have a disaster scenario ?
>> >vcpu_purge_tr_entry only clears the p bit.
>>
>> I think it's not safe for one vcpu to operate date structure on another
>> vcpu. For example, current vcpu is doi
>From: Tristan Gingold
>Sent: 2006?3?30? 16:31
>To: Isaku Yamahata
>Cc: xen-ia64-devel@lists.xensource.com
>Subject: Re: [Xen-ia64-devel] Re: [PATCH]: ptc.ga for SMP-g
>
>Le Mardi 28 Mars 2006 04:04, Isaku Yamahata a écrit :
>> Hi Tristan.
>>
>>
&g
Le Jeudi 30 Mars 2006 10:42, Tian, Kevin a écrit :
> From: Tristan Gingold
>
> >Sent: 2006年3月30日 16:31
> >
> >Le Mardi 28 Mars 2006 04:04, Isaku Yamahata a écrit :
> >> Hi Tristan.
> >>
> >>
> >> + /* Purge tc entry.
> >> + Can we do this directly ? Well, this
>From: Tristan Gingold
>Sent: 2006年3月30日 16:31
>Le Mardi 28 Mars 2006 04:04, Isaku Yamahata a écrit :
>> Hi Tristan.
>>
>>
>> +/* Purge tc entry.
>> + Can we do this directly ? Well, this is just a
>> + single atomic write. */
>> +
Le Mardi 28 Mars 2006 04:04, Isaku Yamahata a écrit :
> Hi Tristan.
>
>
> + /* Purge tc entry.
> +Can we do this directly ? Well, this is just a
> +single atomic write. */
> + vcpu_purge_tr_entry(&PSCBX(v,dtlb
Hi Tristan.
+ /* Purge tc entry.
+ Can we do this directly ? Well, this is just a
+ single atomic write. */
+ vcpu_purge_tr_entry(&PSCBX(v,dtlb));
+ vcpu_purge_tr_entry(&PSCBX(v,
On Mon, 2006-03-27 at 14:15 +0100, Tristan Gingold wrote:
> Le Lundi 27 Mars 2006 15:07, Alex Williamson a écrit :
> > On Mon, 2006-03-27 at 13:53 +0100, Tristan Gingold wrote:
> > > Hi,
> > >
> > > this is a very simple extension of vcpu_ptc_ga to support SMP-g.
> > > The implementation could be o
Le Lundi 27 Mars 2006 15:07, Alex Williamson a écrit :
> On Mon, 2006-03-27 at 13:53 +0100, Tristan Gingold wrote:
> > Hi,
> >
> > this is a very simple extension of vcpu_ptc_ga to support SMP-g.
> > The implementation could be optimized.
>
> Hi Tristan,
>
>There's no patch attached, please res
On Mon, 2006-03-27 at 13:53 +0100, Tristan Gingold wrote:
> Hi,
>
> this is a very simple extension of vcpu_ptc_ga to support SMP-g.
> The implementation could be optimized.
Hi Tristan,
There's no patch attached, please resend. Thanks,
Alex
--
Alex Williamson
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