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From: Andres Lagar-Cavilla <andres@lagarcavilla.org>
To: xen-devel@lists.xen.org
Cc: andres@gridcentric.ca, tim@xen.org
Subject: [PATCH 6 of 6] x86/mm: Locking p2m lookups in shadow mode
Date: Fri, 13 Apr 2012 12:22:24 -0400	[thread overview]
Message-ID: <8ec52231c03d91842d6b.1334334144@xdev.gridcentric.ca> (raw)
In-Reply-To: <patchbomb.1334334138@xdev.gridcentric.ca>

 xen/arch/x86/mm/p2m.c |  5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)


Fully synchronized p2m lookups have been added to hap already. Enable that for
shadow mode as well.

Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>

diff -r 1d8566a05642 -r 8ec52231c03d xen/arch/x86/mm/p2m.c
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -164,7 +164,7 @@ mfn_t __get_gfn_type_access(struct p2m_d
     }
 
     /* For now only perform locking on hap domains */
-    if ( locked && (hap_enabled(p2m->domain)) )
+    if ( locked )
         /* Grab the lock here, don't release until put_gfn */
         gfn_lock(p2m, gfn, 0);
 
@@ -197,8 +197,7 @@ mfn_t __get_gfn_type_access(struct p2m_d
 
 void __put_gfn(struct p2m_domain *p2m, unsigned long gfn)
 {
-    if ( !p2m || !paging_mode_translate(p2m->domain) 
-              || !hap_enabled(p2m->domain) )
+    if ( !p2m || !paging_mode_translate(p2m->domain) )
         /* Nothing to do in this case */
         return;

  parent reply	other threads:[~2012-04-13 16:22 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-13 16:22 [PATCH 0 of 6] x86/mm/shadow: fixes and synchronized p2m lookups Andres Lagar-Cavilla
2012-04-13 16:22 ` [PATCH 1 of 6] x86/mm: Print stack trace on a an mm-locks deadlock panic Andres Lagar-Cavilla
2012-04-18 15:55   ` Tim Deegan
2012-04-18 15:58     ` Andres Lagar-Cavilla
2012-04-13 16:22 ` [PATCH 2 of 6] x86/mm/shadow: enclose an OOS function in the proper conditional ifdef Andres Lagar-Cavilla
2012-04-14 14:08   ` Gianluca Guida
2012-04-18 15:52     ` Tim Deegan
2012-04-13 16:22 ` [PATCH 3 of 6] x86/mm/shadow: fix potential p2m/paging deadlock when emulating page table writes Andres Lagar-Cavilla
2012-04-18 16:13   ` Tim Deegan
2012-04-18 16:25     ` Andres Lagar-Cavilla
2012-04-19 14:51       ` Tim Deegan
2012-04-19 15:07         ` Andres Lagar-Cavilla
2012-04-13 16:22 ` [PATCH 4 of 6] x86/mm/shadow: fix p2m/paging deadlock when updating shadow mode Andres Lagar-Cavilla
2012-04-13 16:22 ` [PATCH 5 of 6] x86/mm/shadow: fix p2m/paging deadlock when updating shadow cr3 Andres Lagar-Cavilla
2012-04-13 16:22 ` Andres Lagar-Cavilla [this message]
2012-04-18 16:03   ` [PATCH 6 of 6] x86/mm: Locking p2m lookups in shadow mode Tim Deegan
2012-04-13 17:35 ` [PATCH 0 of 6] x86/mm/shadow: fixes and synchronized p2m lookups Tim Deegan
2012-04-13 17:37   ` Andres Lagar-Cavilla

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