The patch titled
kvm: add internal filesystem for generating inodes
has been added to the -mm tree. Its filename is
kvm-add-internal-filesystem-for-generating-inodes.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: kvm: add internal filesystem for generating inodes
From: Avi Kivity <avi@xxxxxxxxxxxx>
The kvmfs inodes will represent virtual machines and vcpus, as necessary,
reducing cacheline bouncing due to inodes and filps being shared.
Signed-off-by: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/kvm/kvm_main.c | 33 ++++++++++++++++++++++++++++++++-
1 file changed, 32 insertions(+), 1 deletion(-)
diff -puN drivers/kvm/kvm_main.c~kvm-add-internal-filesystem-for-generating-inodes drivers/kvm/kvm_main.c
--- a/drivers/kvm/kvm_main.c~kvm-add-internal-filesystem-for-generating-inodes
+++ a/drivers/kvm/kvm_main.c
@@ -36,6 +36,8 @@
#include <asm/desc.h>
#include <linux/sysdev.h>
#include <linux/cpu.h>
+#include <linux/fs.h>
+#include <linux/mount.h>
#include "x86_emulate.h"
#include "segment_descriptor.h"
@@ -72,6 +74,9 @@ static struct kvm_stats_debugfs_item {
static struct dentry *debugfs_dir;
+#define KVMFS_MAGIC 0x19700426
+struct vfsmount *kvmfs_mnt;
+
#define MAX_IO_MSRS 256
#define CR0_RESEVED_BITS 0xffffffff1ffaffc0ULL
@@ -2252,6 +2257,18 @@ static struct sys_device kvm_sysdev = {
hpa_t bad_page_address;
+static int kvmfs_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data, struct vfsmount *mnt)
+{
+ return get_sb_pseudo(fs_type, "kvm:", NULL, KVMFS_MAGIC, mnt);
+}
+
+static struct file_system_type kvm_fs_type = {
+ .name = "kvmfs",
+ .get_sb = kvmfs_get_sb,
+ .kill_sb = kill_anon_super,
+};
+
int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module)
{
int r;
@@ -2328,8 +2345,16 @@ void kvm_exit_arch(void)
static __init int kvm_init(void)
{
static struct page *bad_page;
- int r = 0;
+ int r;
+
+ r = register_filesystem(&kvm_fs_type);
+ if (r)
+ goto out3;
+ kvmfs_mnt = kern_mount(&kvm_fs_type);
+ r = PTR_ERR(kvmfs_mnt);
+ if (IS_ERR(kvmfs_mnt))
+ goto out2;
kvm_init_debug();
kvm_init_msr_list();
@@ -2346,6 +2371,10 @@ static __init int kvm_init(void)
out:
kvm_exit_debug();
+ mntput(kvmfs_mnt);
+out2:
+ unregister_filesystem(&kvm_fs_type);
+out3:
return r;
}
@@ -2353,6 +2382,8 @@ static __exit void kvm_exit(void)
{
kvm_exit_debug();
__free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT));
+ mntput(kvmfs_mnt);
+ unregister_filesystem(&kvm_fs_type);
}
module_init(kvm_init)
_
Patches currently in -mm which might be from avi@xxxxxxxxxxxx are
kvm-mmu-add-missing-dirty-page-tracking-cases.patch
kvm-move-virtualization-deactivation-from-cpu_dead.patch
kvm-cosmetics.patch
kvm-vmx-hack-set_cr0_no_modeswitch-to-actually-do.patch
kvm-use-array_size-macro-instead-of-manual-calculation.patch
kvm-use-page_private-set_page_private-apis.patch
kvm-add-msr-based-hypercall-api.patch
kvm-add-host-hypercall-support-for-vmx.patch
kvm-add-hypercall-host-support-for-svm.patch
kvm-wire-up-hypercall-handlers-to-a-central.patch
kvm-svm-init-cr0-with-the-wp-bit-set.patch
kvm-svm-intercept-smi-to-handle-it-at-host-level.patch
kvm-more-0-null-conversions.patch
kvm-add-internal-filesystem-for-generating-inodes.patch
kvm-add-internal-filesystem-for-generating-inodes-tweak.patch
kvm-create-an-inode-per-virtual-machine.patch
kvm-rename-some-kvm_dev_ioctl_-functions-to.patch
kvm-move-kvm_vm_ioctl_create_vcpu-around.patch
kvm-per-vcpu-inodes.patch
kvm-bump-api-version.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
