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Message-ID: <20101016043455.GB3177@darkstar>
Date: Sat, 16 Oct 2010 12:34:55 +0800
From: Dave Young <hidave.darkstar@...il.com>
To: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org, kvm@...r.kernel.org
Subject: [PATCH 2/2] kvm: use vzalloc instead of vmalloc
Use vzalloc instead of vmalloc in kvm code.
Signed-off-by: Dave Young <hidave.darkstar@...il.com>
---
arch/x86/kvm/x86.c | 3 +--
virt/kvm/kvm_main.c | 13 ++++---------
2 files changed, 5 insertions(+), 11 deletions(-)
--- linux-2.6.orig/virt/kvm/kvm_main.c 2010-09-25 21:18:06.000000000 +0800
+++ linux-2.6/virt/kvm/kvm_main.c 2010-10-16 11:26:05.106672156 +0800
@@ -604,13 +604,11 @@ int __kvm_set_memory_region(struct kvm *
/* Allocate if a slot is being created */
#ifndef CONFIG_S390
if (npages && !new.rmap) {
- new.rmap = vmalloc(npages * sizeof(*new.rmap));
+ new.rmap = vzalloc(npages * sizeof(*new.rmap));
if (!new.rmap)
goto out_free;
- memset(new.rmap, 0, npages * sizeof(*new.rmap));
-
new.user_alloc = user_alloc;
new.userspace_addr = mem->userspace_addr;
}
@@ -633,14 +631,12 @@ int __kvm_set_memory_region(struct kvm *
>> KVM_HPAGE_GFN_SHIFT(level));
lpages -= base_gfn >> KVM_HPAGE_GFN_SHIFT(level);
- new.lpage_info[i] = vmalloc(lpages * sizeof(*new.lpage_info[i]));
+ new.lpage_info[i] = vzalloc(lpages *
+ sizeof(*new.lpage_info[i]));
if (!new.lpage_info[i])
goto out_free;
- memset(new.lpage_info[i], 0,
- lpages * sizeof(*new.lpage_info[i]));
-
if (base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1))
new.lpage_info[i][0].write_count = 1;
if ((base_gfn+npages) & (KVM_PAGES_PER_HPAGE(level) - 1))
@@ -663,10 +659,9 @@ skip_lpage:
if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
unsigned long dirty_bytes = kvm_dirty_bitmap_bytes(&new);
- new.dirty_bitmap = vmalloc(dirty_bytes);
+ new.dirty_bitmap = vzalloc(dirty_bytes);
if (!new.dirty_bitmap)
goto out_free;
- memset(new.dirty_bitmap, 0, dirty_bytes);
/* destroy any largepage mappings for dirty tracking */
if (old.npages)
flush_shadow = 1;
--- linux-2.6.orig/arch/x86/kvm/x86.c 2010-08-29 08:47:02.000000000 +0800
+++ linux-2.6/arch/x86/kvm/x86.c 2010-10-16 11:22:52.826666511 +0800
@@ -2917,10 +2917,9 @@ int kvm_vm_ioctl_get_dirty_log(struct kv
spin_unlock(&kvm->mmu_lock);
r = -ENOMEM;
- dirty_bitmap = vmalloc(n);
+ dirty_bitmap = vzalloc(n);
if (!dirty_bitmap)
goto out;
- memset(dirty_bitmap, 0, n);
r = -ENOMEM;
slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
--
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