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Re: [Qemu-devel] [PATCH 46/51] ram: Remember last_page instead of last_o
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [Qemu-devel] [PATCH 46/51] ram: Remember last_page instead of last_offset |
Date: |
Fri, 31 Mar 2017 10:09:15 +0100 |
User-agent: |
Mutt/1.8.0 (2017-02-23) |
* Juan Quintela (address@hidden) wrote:
> Signed-off-by: Juan Quintela <address@hidden>
> ---
> migration/ram.c | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/migration/ram.c b/migration/ram.c
> index b1a031e..57b776b 100644
> --- a/migration/ram.c
> +++ b/migration/ram.c
> @@ -171,8 +171,8 @@ struct RAMState {
> RAMBlock *last_seen_block;
> /* Last block from where we have sent data */
> RAMBlock *last_sent_block;
> - /* Last offset we have sent data from */
> - ram_addr_t last_offset;
> + /* Last dirty page we have sent */
Can you make that 'Last dirty target page we have sent'
just so we know which shape page we're dealing with.
> + ram_addr_t last_page;
> /* last ram version we have seen */
> uint32_t last_version;
> /* We are in the first round */
> @@ -1063,7 +1063,7 @@ static bool find_dirty_block(RAMState *rs,
> PageSearchStatus *pss,
> pss->offset = migration_bitmap_find_dirty(rs, pss->block, pss->offset,
> page);
> if (pss->complete_round && pss->block == rs->last_seen_block &&
> - pss->offset >= rs->last_offset) {
> + pss->offset >= rs->last_page) {
That's odd; isn't pss->offset still in bytes?
Dave
> /*
> * We've been once around the RAM and haven't found anything.
> * Give up.
> @@ -1396,7 +1396,7 @@ static int ram_find_and_save_block(RAMState *rs, bool
> last_stage)
> }
>
> pss.block = rs->last_seen_block;
> - pss.offset = rs->last_offset;
> + pss.offset = rs->last_page << TARGET_PAGE_BITS;
> pss.complete_round = false;
>
> if (!pss.block) {
> @@ -1418,7 +1418,7 @@ static int ram_find_and_save_block(RAMState *rs, bool
> last_stage)
> } while (!pages && again);
>
> rs->last_seen_block = pss.block;
> - rs->last_offset = pss.offset;
> + rs->last_page = pss.offset >> TARGET_PAGE_BITS;
>
> return pages;
> }
> @@ -1493,7 +1493,7 @@ static void ram_state_reset(RAMState *rs)
> {
> rs->last_seen_block = NULL;
> rs->last_sent_block = NULL;
> - rs->last_offset = 0;
> + rs->last_page = 0;
> rs->last_version = ram_list.version;
> rs->ram_bulk_stage = true;
> }
> @@ -1838,7 +1838,7 @@ static int postcopy_chunk_hostpages(MigrationState *ms)
> /* Easiest way to make sure we don't resume in the middle of a host-page
> */
> rs->last_seen_block = NULL;
> rs->last_sent_block = NULL;
> - rs->last_offset = 0;
> + rs->last_page = 0;
>
> QLIST_FOREACH_RCU(block, &ram_list.blocks, next) {
> unsigned long first = block->offset >> TARGET_PAGE_BITS;
> --
> 2.9.3
>
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK
- Re: [Qemu-devel] [PATCH 42/51] ram: Pass RAMBlock to bitmap_sync, (continued)
[Qemu-devel] [PATCH 45/51] ram: Use page number instead of an address for the bitmap operations, Juan Quintela, 2017/03/23
[Qemu-devel] [PATCH 43/51] ram: ram_discard_range() don't use the mis parameter, Juan Quintela, 2017/03/23
[Qemu-devel] [PATCH 46/51] ram: Remember last_page instead of last_offset, Juan Quintela, 2017/03/23
- Re: [Qemu-devel] [PATCH 46/51] ram: Remember last_page instead of last_offset,
Dr. David Alan Gilbert <=
[Qemu-devel] [PATCH 47/51] ram: Change offset field in PageSearchStatus to page, Juan Quintela, 2017/03/23
[Qemu-devel] [PATCH 44/51] ram: reorganize last_sent_block, Juan Quintela, 2017/03/23
[Qemu-devel] [PATCH 48/51] ram: Use ramblock and page offset instead of absolute offset, Juan Quintela, 2017/03/23
[Qemu-devel] [PATCH 49/51] ram: rename last_ram_offset() last_ram_pages(), Juan Quintela, 2017/03/23
[Qemu-devel] [PATCH 51/51] migration: Remove MigrationState parameter from migration_is_idle(), Juan Quintela, 2017/03/23