The patch titled
Subject: mmu-notifier-add-clear_young-callback-fix
has been removed from the -mm tree. Its filename was
mmu-notifier-add-clear_young-callback-fix.patch
This patch was dropped because it was folded into mmu-notifier-add-clear_young-callback.patch
------------------------------------------------------
From: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Subject: mmu-notifier-add-clear_young-callback-fix
Cc: Andres Lagar-Cavilla <andreslc@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
virt/kvm/kvm_main.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff -puN virt/kvm/kvm_main.c~mmu-notifier-add-clear_young-callback-fix virt/kvm/kvm_main.c
--- a/virt/kvm/kvm_main.c~mmu-notifier-add-clear_young-callback-fix
+++ a/virt/kvm/kvm_main.c
@@ -397,6 +397,19 @@ static int kvm_mmu_notifier_clear_young(
idx = srcu_read_lock(&kvm->srcu);
spin_lock(&kvm->mmu_lock);
+ /*
+ * Even though we do not flush TLB, this will still adversely
+ * affect performance on pre-Haswell Intel EPT, where there is
+ * no EPT Access Bit to clear so that we have to tear down EPT
+ * tables instead. If we find this unacceptable, we can always
+ * add a parameter to kvm_age_hva so that it effectively doesn't
+ * do anything on clear_young.
+ *
+ * Also note that currently we never issue secondary TLB flushes
+ * from clear_young, leaving this job up to the regular system
+ * cadence. If we find this inaccurate, we might come up with a
+ * more sophisticated heuristic later.
+ */
young = kvm_age_hva(kvm, start, end);
spin_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
_
Patches currently in -mm which might be from vdavydov@xxxxxxxxxxxxx are
memcg-add-page_cgroup_ino-helper.patch
hwpoison-use-page_cgroup_ino-for-filtering-by-memcg.patch
memcg-zap-try_get_mem_cgroup_from_page.patch
proc-add-kpagecgroup-file.patch
mmu-notifier-add-clear_young-callback.patch
proc-add-kpageidle-file.patch
proc-add-kpageidle-file-fix.patch
proc-add-kpageidle-file-fix-2.patch
proc-add-kpageidle-file-fix-3.patch
proc-add-kpageidle-file-fix-4.patch
proc-add-kpageidle-file-fix-5.patch
proc-add-kpageidle-file-fix-6.patch
proc-add-kpageidle-file-fix-6-fix-2.patch
proc-export-idle-flag-via-kpageflags.patch
proc-add-cond_resched-to-proc-kpage-read-write-loop.patch
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