I should have added that this is how it works in z/VM 5.2.0 and newer
releases. z/VM 5.1.0 and older still use the old FRMTE based locking
scheme, and there's no host logical / host real differentiation, so there
's
only one check, FRMCPLOK.
- Bill Holder, z/VM Development, IBM
On Fri, 12 Dec
thanks - I'll let you know when I get this cookin'
David
From: The IBM z/VM Operating System on behalf of Bill Holder
Sent: Fri 12/12/2008 9:39 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: [IBMVM] query of CP locked guest pages
I should have added
The locking / pinning mechanism moved from the FRMTE to the PTE/PGSTE as
of
5.2.0 as part of the support for HPMA (a hardware page fault assist allow
ing
hardware pinning) and QDIO passthrough. A page being locked by command i
s
now indicated by the PGSCPLOK bit in byte 6 of the PGSTE (see also
Dave, are you looking to unlock just a subset of what was locked, or all
of
them? If you just want to unlock everything, a single UNLOCK command
covering all the guest's storage (or two, if pages were explicitly locked
to
both real and logical) will do it.
- Bill Holder, z/VM Development,
The other trick I should mention is that PGSCPLOK is only set if the pa
ge
was explicitly locked to host real. If locked by command to host logical
,
SXSCPLOK is set in the corresponding SXSTE (another structure entirely,
which is used to manage System Execution Space (Host Logical) page usage
] query of CP locked guest pages
Dave, are you looking to unlock just a subset of what was locked, or all =
of
them? If you just want to unlock everything, a single UNLOCK command
covering all the guest's storage (or two, if pages were explicitly locked=
to
both real and logical) will do
On Thursday, 12/11/2008 at 01:32 EST, David Kreuter
dkreu...@vm-resources.com wrote:
nah I am in need of a method to determine which pages of a virtual
machine
have been locked by the lock command.
Would you use the information for anything other than to unlock said
pages?
Alan Altmark
There is indeed no CP QUERY LOCKED command, I assume because nobody's ask
ed
for it before (ok, I haven't actually looked to see if anyone has, it's
possible someone did, but it never made the cut). If the information
wasn't saved from the point where the LOCK requests were issued, I can't
think
On Wed, Dec 10, 2008 at 4:47 PM, Dave Jones [EMAIL PROTECTED] wrote:
I'm stumped hereI have a guest virtual machine (running Linux, but I
think that's immaterial) that has locked some of its pages into host storage
via the CP LOCK commandnow I want to find out *which* guest pages were
Heij
Sent: Wed 12/10/2008 6:15 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: [IBMVM] query of CP locked guest pages
On Wed, Dec 10, 2008 at 4:47 PM, Dave Jones [EMAIL PROTECTED] wrote:
I'm stumped hereI have a guest virtual machine (running Linux, but I
think that's immaterial) that has
On Thu, Dec 11, 2008 at 12:22 AM, David Kreuter
[EMAIL PROTECTED] wrote:
The frametable entries do not have an obvious bit indicating that the page
is a target of a CP lock. I'll keep digging.
I'm going to as time permits hunt down through the virtual machine pgmbk's.
David
So you can tell
.
David
From: The IBM z/VM Operating System on behalf of Rob van der Heij
Sent: Wed 12/10/2008 7:05 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: [IBMVM] query of CP locked guest pages
On Thu, Dec 11, 2008 at 12:22 AM, David Kreuter
[EMAIL PROTECTED] wrote
12 matches
Mail list logo
