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PATCH In review Izik Eidus 1 participant 1 message Oct 13, 2007 KVM

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Izik Eidus

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PATCH 4/4 Swapping

this patch just remove the memset from kvmctl, so the vm will load much faster now

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From dc0164113041c2f2bf22fc066ca99b9b8531d627 Mon Sep 17 00:00:00 2001

From: Izik Eidus <izik@Home1.(none)>
Date: Sat, 13 Oct 2007 02:56:25 +0200
Subject: [PATCH] now that gfn_to_page get called at run time, we dont have to do memset on the memory. (it is now much faster to load VM with alot of memory)

Signed-off-by Izik Eidus <izike-atKUWr5tajBWk0Htik3J/[email protected]>
---
 user/kvmctl.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
user/kvmctl.c +0 -3
index 0604f2f..ff2014e 100644
@@ -391,7 +391,6 @@ int kvm_alloc_userspace_memory(kvm_context_t kvm, unsigned long memory,
 
 
 	low_memory.userspace_addr = (unsigned long)*vm_mem;
-	memset((unsigned long *)low_memory.userspace_addr, 0, low_memory.memory_size);
 	/* 640K should be enough. */
 	r = ioctl(kvm->vm_fd, KVM_SET_USER_MEMORY_REGION, &low_memory);
 	if (r == -1) {

@@ -406,7 +405,6 @@ int kvm_alloc_userspace_memory(kvm_context_t kvm, unsigned long memory,
 			return -1;
 		}
 		extended_memory.userspace_addr = (unsigned long)(*vm_mem + exmem);
-		memset((unsigned long *)extended_memory.userspace_addr, 0, extended_memory.memory_size);
 		r = ioctl(kvm->vm_fd, KVM_SET_USER_MEMORY_REGION, &extended_memory);
 		if (r == -1) {
 			fprintf(stderr, "kvm_create_memory_region: %m\n");

@@ -422,7 +420,6 @@ int kvm_alloc_userspace_memory(kvm_context_t kvm, unsigned long memory,
 			return -1;
 		}
 		above_4g_memory.userspace_addr = (unsigned long)(*vm_mem + 0x100000000);
-		memset((unsigned long *)above_4g_memory.userspace_addr, 0, above_4g_memory.memory_size);
 		r = ioctl(kvm->vm_fd, KVM_SET_USER_MEMORY_REGION, &above_4g_memory);
 		if (r == -1) {
 			fprintf(stderr, "kvm_create_memory_region: %m\n");
Signature · 1 line
1.5.2.4

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