From: Igor Mammedov <imammedo@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: pbonzini@redhat.com, kvm@vger.kernel.org
Subject: [PATCH 2/5] kvm: update_memslots: drop not needed check for the same slot
Date: Mon, 1 Dec 2014 17:29:24 +0000 [thread overview]
Message-ID: <1417454967-4465-3-git-send-email-imammedo@redhat.com> (raw)
In-Reply-To: <1417454967-4465-1-git-send-email-imammedo@redhat.com>
UP/DOWN shift loops will shift array in needed
direction and stop at place where new slot should
be placed regardless of old slot size.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
virt/kvm/kvm_main.c | 25 +++++++++++--------------
1 file changed, 11 insertions(+), 14 deletions(-)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 407277b..278ed65 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -679,20 +679,17 @@ static void update_memslots(struct kvm_memslots *slots,
struct kvm_memory_slot *mslots = slots->memslots;
WARN_ON(mslots[i].id != id);
- if (new->npages < mslots[i].npages) {
- while (i < KVM_MEM_SLOTS_NUM - 1 &&
- new->npages < mslots[i + 1].npages) {
- mslots[i] = mslots[i + 1];
- slots->id_to_index[mslots[i].id] = i;
- i++;
- }
- } else {
- while (i > 0 &&
- new->npages > mslots[i - 1].npages) {
- mslots[i] = mslots[i - 1];
- slots->id_to_index[mslots[i].id] = i;
- i--;
- }
+ while (i < KVM_MEM_SLOTS_NUM - 1 &&
+ new->npages < mslots[i + 1].npages) {
+ mslots[i] = mslots[i + 1];
+ slots->id_to_index[mslots[i].id] = i;
+ i++;
+ }
+ while (i > 0 &&
+ new->npages > mslots[i - 1].npages) {
+ mslots[i] = mslots[i - 1];
+ slots->id_to_index[mslots[i].id] = i;
+ i--;
}
mslots[i] = *new;
--
1.8.3.1
next prev parent reply other threads:[~2014-12-01 17:30 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-01 17:29 [PATCH 0/5] kvm: memslots lookup optimization Igor Mammedov
2014-12-01 17:29 ` [PATCH 1/5] kvm: update_memslots: drop not needed check for the same number of pages Igor Mammedov
2014-12-01 17:29 ` Igor Mammedov [this message]
2014-12-01 17:29 ` [PATCH 3/5] kvm: search_memslots: add simple LRU memslot caching Igor Mammedov
2014-12-01 17:29 ` [PATCH 4/5] kvm: change memslot sorting rule from size to GFN Igor Mammedov
2014-12-01 17:29 ` [PATCH 5/5] kvm: optimize GFN to memslot lookup with large slots amount Igor Mammedov
2014-12-02 17:33 ` Radim Krčmář
2014-12-02 18:45 ` Paolo Bonzini
2014-12-02 21:03 ` Radim Krčmář
2014-12-01 17:38 ` [PATCH 0/5] kvm: memslots lookup optimization Paolo Bonzini
2014-12-02 7:57 ` Igor Mammedov
2014-12-02 13:24 ` Paolo Bonzini
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1417454967-4465-3-git-send-email-imammedo@redhat.com \
--to=imammedo@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=pbonzini@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®