From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
To: zhanghailiang <zhang.zhanghailiang@huawei.com>
Cc: lizhijian@cn.fujitsu.com, quintela@redhat.com,
yunhong.jiang@intel.com, eddie.dong@intel.com,
peter.huangpeng@huawei.com, qemu-devel@nongnu.org,
arei.gonglei@huawei.com, stefanha@redhat.com,
amit.shah@redhat.com, hongyang.yang@easystack.cn
Subject: Re: [Qemu-devel] [PATCH COLO-Frame v11 16/39] ram/COLO: Record the dirty pages that SVM received
Date: Tue, 1 Dec 2015 19:36:18 +0000 [thread overview]
Message-ID: <20151201193618.GE31209@work-vm> (raw)
In-Reply-To: <1448357149-17572-17-git-send-email-zhang.zhanghailiang@huawei.com>
* zhanghailiang (zhang.zhanghailiang@huawei.com) wrote:
> We record the address of the dirty pages that received,
> it will help flushing pages that cached into SVM.
> We record them by re-using migration dirty bitmap.
>
> Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
> ---
> v11:
> - Split a new helper function from original
> host_from_stream_offset() (Dave's suggestion)
> - Only do recording work in this patch
> v10:
> - New patch split from v9's patch 13
> - Rebase to master to use 'migration_bitmap_rcu'
> ---
> migration/ram.c | 30 ++++++++++++++++++++++++++++++
> 1 file changed, 30 insertions(+)
>
> diff --git a/migration/ram.c b/migration/ram.c
> index 9d946a1..da6bbd6 100644
> --- a/migration/ram.c
> +++ b/migration/ram.c
> @@ -2153,6 +2153,7 @@ static inline RAMBlock *ram_block_from_stream(QEMUFile *f,
>
> return block;
> }
> +
> len = qemu_get_byte(f);
> qemu_get_buffer(f, (uint8_t *)id, len);
> id[len] = 0;
That blank should probably go, but other than that:
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Dave
> @@ -2179,10 +2180,23 @@ static inline void *host_from_ram_block_offset(RAMBlock *block,
> static inline void *colo_cache_from_block_offset(RAMBlock *block,
> ram_addr_t offset)
> {
> + unsigned long *bitmap;
> + long k;
> +
> if (!block) {
> return NULL;
> }
>
> + k = (block->mr->ram_addr + offset) >> TARGET_PAGE_BITS;
> + bitmap = atomic_rcu_read(&migration_bitmap_rcu)->bmap;
> + /*
> + * During colo checkpoint, we need bitmap of these migrated pages.
> + * It help us to decide which pages in ram cache should be flushed
> + * into VM's RAM later.
> + */
> + if (!test_and_set_bit(k, bitmap)) {
> + migration_dirty_pages++;
> + }
> return block->colo_cache + offset;
> }
>
> @@ -2573,6 +2587,7 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id)
> int colo_init_ram_cache(void)
> {
> RAMBlock *block;
> + int64_t ram_cache_pages = last_ram_offset() >> TARGET_PAGE_BITS;
>
> rcu_read_lock();
> QLIST_FOREACH_RCU(block, &ram_list.blocks, next) {
> @@ -2587,6 +2602,15 @@ int colo_init_ram_cache(void)
> }
> rcu_read_unlock();
> ram_cache_enable = true;
> + /*
> + * Record the dirty pages that sent by PVM, we use this dirty bitmap together
> + * with to decide which page in cache should be flushed into SVM's RAM. Here
> + * we use the same name 'migration_bitmap_rcu' as for migration.
> + */
> + migration_bitmap_rcu = g_new0(struct BitmapRcu, 1);
> + migration_bitmap_rcu->bmap = bitmap_new(ram_cache_pages);
> + migration_dirty_pages = 0;
> +
> return 0;
>
> out_locked:
> @@ -2604,9 +2628,15 @@ out_locked:
> void colo_release_ram_cache(void)
> {
> RAMBlock *block;
> + struct BitmapRcu *bitmap = migration_bitmap_rcu;
>
> ram_cache_enable = false;
>
> + atomic_rcu_set(&migration_bitmap_rcu, NULL);
> + if (bitmap) {
> + call_rcu(bitmap, migration_bitmap_free, rcu);
> + }
> +
> rcu_read_lock();
> QLIST_FOREACH_RCU(block, &ram_list.blocks, next) {
> if (block->colo_cache) {
> --
> 1.8.3.1
>
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
next prev parent reply other threads:[~2015-12-01 19:36 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-24 9:25 [Qemu-devel] [PATCH COLO-Frame v11 00/39] COarse-grain LOck-stepping(COLO) Virtual Machines for Non-stop Service (FT) zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 01/39] configure: Add parameter for configure to enable/disable COLO support zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 02/39] migration: Introduce capability 'x-colo' to migration zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 03/39] COLO: migrate colo related info to secondary node zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 04/39] migration: Export migrate_set_state() zhanghailiang
2015-11-24 17:31 ` Dr. David Alan Gilbert
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 05/39] migration: Add state records for migration incoming zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 06/39] migration: Integrate COLO checkpoint process into migration zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 07/39] migration: Integrate COLO checkpoint process into loadvm zhanghailiang
2015-11-24 18:14 ` Dr. David Alan Gilbert
2015-11-25 6:39 ` zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 08/39] migration: Rename the'file' member of MigrationState zhanghailiang
2015-11-24 18:26 ` Dr. David Alan Gilbert
2015-11-25 6:48 ` zhanghailiang
2015-12-10 6:41 ` Wen Congyang
2015-12-11 3:40 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 09/39] COLO/migration: Create a new communication path from destination to source zhanghailiang
2015-11-24 18:40 ` Dr. David Alan Gilbert
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 10/39] COLO: Implement colo checkpoint protocol zhanghailiang
2015-11-24 19:00 ` Dr. David Alan Gilbert
2015-11-25 14:01 ` Eric Blake
2015-11-26 6:52 ` Hailiang Zhang
2015-11-26 7:12 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 11/39] COLO: Add a new RunState RUN_STATE_COLO zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 12/39] QEMUSizedBuffer: Introduce two help functions for qsb zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 13/39] COLO: Save PVM state to secondary side when do checkpoint zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 14/39] ram: Split host_from_stream_offset() into two helper functions zhanghailiang
2015-12-01 18:19 ` Dr. David Alan Gilbert
2015-12-03 7:19 ` Hailiang Zhang
2015-12-03 7:29 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 15/39] COLO: Load PVM's dirty pages into SVM's RAM cache temporarily zhanghailiang
2015-12-01 19:02 ` Dr. David Alan Gilbert
2015-12-03 8:25 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 16/39] ram/COLO: Record the dirty pages that SVM received zhanghailiang
2015-12-01 19:36 ` Dr. David Alan Gilbert [this message]
2015-12-03 8:29 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 17/39] COLO: Load VMState into qsb before restore it zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 18/39] COLO: Flush PVM's cached RAM into SVM's memory zhanghailiang
2015-11-27 5:29 ` Li Zhijian
2015-12-01 12:02 ` Hailiang Zhang
2015-12-01 20:06 ` Dr. David Alan Gilbert
2015-12-03 8:50 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 19/39] COLO: Add checkpoint-delay parameter for migrate-set-parameters zhanghailiang
2015-12-09 18:50 ` Dr. David Alan Gilbert
2015-12-11 3:20 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 20/39] COLO: synchronize PVM's state to SVM periodically zhanghailiang
2015-12-09 18:53 ` Dr. David Alan Gilbert
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 21/39] COLO failover: Introduce a new command to trigger a failover zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 22/39] COLO failover: Introduce state to record failover process zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 23/39] COLO: Implement failover work for Primary VM zhanghailiang
2015-12-10 18:34 ` Dr. David Alan Gilbert
2015-12-11 7:54 ` Hailiang Zhang
2015-12-11 9:22 ` Dr. David Alan Gilbert
2015-12-11 9:38 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 24/39] COLO: Implement failover work for Secondary VM zhanghailiang
2015-12-10 18:50 ` Dr. David Alan Gilbert
2015-12-11 8:27 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 25/39] COLO: implement default failover treatment zhanghailiang
2015-12-10 19:01 ` Dr. David Alan Gilbert
2015-12-11 9:48 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 26/39] qmp event: Add event notification for COLO error zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 27/39] COLO failover: Shutdown related socket fd when do failover zhanghailiang
2015-12-10 20:03 ` Dr. David Alan Gilbert
2015-12-11 8:57 ` Hailiang Zhang
2015-12-11 9:18 ` Dr. David Alan Gilbert
2015-12-11 9:29 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 28/39] COLO failover: Don't do failover during loading VM's state zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 29/39] COLO: Process shutdown command for VM in COLO state zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 30/39] COLO: Update the global runstate after going into colo state zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 31/39] savevm: Split load vm state function qemu_loadvm_state zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 32/39] COLO: Separate the process of saving/loading ram and device state zhanghailiang
2015-11-27 5:10 ` Li Zhijian
2015-12-01 12:07 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 33/39] COLO: Split qemu_savevm_state_begin out of checkpoint process zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 34/39] net/filter-buffer: Add default filter-buffer for each netdev zhanghailiang
2015-11-27 11:39 ` Yang Hongyang
2015-11-28 5:55 ` Hailiang Zhang
2015-11-30 1:19 ` Li Zhijian
2015-12-01 8:56 ` Hailiang Zhang
2015-12-03 1:17 ` Wen Congyang
2015-12-03 3:53 ` Hailiang Zhang
2015-12-03 6:25 ` Wen Congyang
2015-12-03 6:48 ` Hailiang Zhang
2015-12-03 7:21 ` Yang Hongyang
2015-12-03 8:37 ` Hailiang Zhang
2015-12-07 7:38 ` Hailiang Zhang
2015-12-08 1:49 ` Yang Hongyang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 35/39] filter-buffer: Accept zero interval zhanghailiang
2015-11-27 11:42 ` Yang Hongyang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 36/39] filter-buffer: Introduce a helper function to enable/disable default filter zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 37/39] filter-buffer: Introduce a helper function to release packets zhanghailiang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 38/39] colo: Use default buffer-filter to buffer and " zhanghailiang
2015-11-27 12:51 ` Yang Hongyang
2015-11-28 6:15 ` Hailiang Zhang
2015-11-24 9:25 ` [Qemu-devel] [PATCH COLO-Frame v11 39/39] COLO: Add block replication into colo process zhanghailiang
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