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List:       xen-devel
Subject:    [Xen-devel] [PATCH 2 of 7] xenpaging: do not bounce p2mt to
From:       Olaf Hering <olaf () aepfle ! de>
Date:       2011-03-31 17:36:19
Message-ID: a811d86a48f400cd5415.1301592979 () localhost
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# HG changeset patch
# User Olaf Hering <olaf@aepfle.de>
# Date 1301591517 -7200
# Node ID a811d86a48f400cd541500e0e6ae765fdcd02ef9
# Parent  cc831886cb6a2ee356e132e331741dff2257fca3
xenpaging: do not bounce p2mt to xenpaging

Do not bounce p2mt to xenpaging because p2m_mem_paging_populate and
p2m_mem_paging_resume dont make use of p2mt. Only pages of type
p2m_ram_rw will be paged-out, and during page-in this type has to be
restored.

Signed-off-by: Olaf Hering <olaf@aepfle.de>

diff -r cc831886cb6a -r a811d86a48f4 tools/xenpaging/xenpaging.c
--- a/tools/xenpaging/xenpaging.c	Tue Mar 29 10:23:05 2011 +0200
+++ b/tools/xenpaging/xenpaging.c	Thu Mar 31 19:11:57 2011 +0200
@@ -657,7 +657,6 @@
 
                 /* Prepare the response */
                 rsp.gfn = req.gfn;
-                rsp.p2mt = req.p2mt;
                 rsp.vcpu_id = req.vcpu_id;
                 rsp.flags = req.flags;
 
@@ -674,10 +673,8 @@
             else
             {
                 DPRINTF("page already populated (domain = %d; vcpu = %d;"
-                        " p2mt = %x;"
                         " gfn = %"PRIx64"; paused = %d)\n",
                         paging->mem_event.domain_id, req.vcpu_id,
-                        req.p2mt,
                         req.gfn, req.flags & MEM_EVENT_FLAG_VCPU_PAUSED);
 
                 /* Tell Xen to resume the vcpu */
@@ -686,7 +683,6 @@
                 {
                     /* Prepare the response */
                     rsp.gfn = req.gfn;
-                    rsp.p2mt = req.p2mt;
                     rsp.vcpu_id = req.vcpu_id;
                     rsp.flags = req.flags;
 
diff -r cc831886cb6a -r a811d86a48f4 xen/arch/x86/mm/p2m.c
--- a/xen/arch/x86/mm/p2m.c	Tue Mar 29 10:23:05 2011 +0200
+++ b/xen/arch/x86/mm/p2m.c	Thu Mar 31 19:11:57 2011 +0200
@@ -2903,7 +2903,6 @@
 
     /* Send request to pager */
     req.gfn = gfn;
-    req.p2mt = p2mt;
     req.vcpu_id = v->vcpu_id;
 
     mem_event_put_request(d, &req);

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