From: Avi Kivity <avi@qumranet.com> To: kvm-devel@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org, akpm@osdl.org, mingo@elte.hu Subject: [PATCH 1/6] KVM: Add internal filesystem for generating inodes Date: Wed, 21 Feb 2007 18:13:35 -0000 [thread overview] Message-ID: <20070221181335.9651025016D@il.qumranet.com> (raw) In-Reply-To: <45DC8B6E.5050205@qumranet.com> 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@qumranet.com> --- drivers/kvm/kvm_main.c | 33 ++++++++++++++++++++++++++++++++- 1 files changed, 32 insertions(+), 1 deletions(-) diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 0df0eeb..c01252e 100644 --- a/drivers/kvm/kvm_main.c +++ b/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)
WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org> To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Cc: akpm-3NddpPZAyC0@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Subject: [PATCH 1/6] KVM: Add internal filesystem for generating inodes Date: Wed, 21 Feb 2007 18:13:35 -0000 [thread overview] Message-ID: <20070221181335.9651025016D@il.qumranet.com> (raw) In-Reply-To: <45DC8B6E.5050205-atKUWr5tajBWk0Htik3J/w@public.gmane.org> 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-atKUWr5tajBWk0Htik3J/w@public.gmane.org> --- drivers/kvm/kvm_main.c | 33 ++++++++++++++++++++++++++++++++- 1 files changed, 32 insertions(+), 1 deletions(-) diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 0df0eeb..c01252e 100644 --- a/drivers/kvm/kvm_main.c +++ b/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) ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
next prev parent reply other threads:[~2007-02-21 18:13 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2007-02-21 18:11 [PATCH 0/6] KVM userspace interface updates for 2.6.21 Avi Kivity 2007-02-21 18:11 ` Avi Kivity 2007-02-21 18:13 ` Avi Kivity [this message] 2007-02-21 18:13 ` [PATCH 1/6] KVM: Add internal filesystem for generating inodes Avi Kivity 2007-02-21 18:14 ` [PATCH 2/6] KVM: Create an inode per virtual machine Avi Kivity 2007-02-21 18:14 ` Avi Kivity 2007-02-21 18:15 ` [PATCH 3/6] KVM: Rename some kvm_dev_ioctl_*() functions to kvm_vm_ioctl_*() Avi Kivity 2007-02-21 18:15 ` Avi Kivity 2007-02-21 18:16 ` [PATCH 4/6] KVM: Move kvm_vm_ioctl_create_vcpu() around Avi Kivity 2007-02-21 18:16 ` Avi Kivity 2007-02-21 18:17 ` [PATCH 5/6] KVM: Per-vcpu inodes Avi Kivity 2007-02-21 18:17 ` Avi Kivity 2007-02-21 18:18 ` [PATCH 6/6] KVM: Bump API version Avi Kivity 2007-02-21 18:18 ` Avi Kivity 2007-02-21 18:21 ` [PATCH 0/6] KVM userspace interface updates for 2.6.21 Avi Kivity 2007-02-21 18:21 ` Avi Kivity 2007-02-21 19:08 ` [kvm-devel] " Rusty Russell 2007-02-21 19:08 ` Rusty Russell 2007-02-25 9:58 ` Avi Kivity 2007-02-25 9:58 ` Avi Kivity 2007-02-25 11:47 ` Andrew Morton 2007-02-25 11:47 ` Andrew Morton
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