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migration: No off-by-one for pss->page update in host page size 

We used to do off-by-one fixup for pss->page when finished one host huge page
transfer.  That seems to be unnecesary at all.  Drop it.

Cc: Keqian Zhu <zhukeqian1@huawei.com>
Cc: Kunkun Jiang <jiangkunkun@huawei.com>
Cc: Andrey Gruzdev <andrey.gruzdev@virtuozzo.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Peter Xu 2022-01-19 16:09:15 +08:00 committed by Juan Quintela
parent ae68066880
commit 258f5c9825
1 changed files with 2 additions and 2 deletions
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4
migration/ram.c
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@ -1617,7 +1617,7 @@ static int ram_save_release_protection(RAMState *rs, PageSearchStatus *pss,
/* Check if page is from UFFD-managed region. */ /* Check if page is from UFFD-managed region. */
if (pss->block->flags & RAM_UF_WRITEPROTECT) { if (pss->block->flags & RAM_UF_WRITEPROTECT) {
void *page_address = pss->block->host + (start_page << TARGET_PAGE_BITS); void *page_address = pss->block->host + (start_page << TARGET_PAGE_BITS);
uint64_t run_length = (pss->page - start_page + 1) << TARGET_PAGE_BITS; uint64_t run_length = (pss->page - start_page) << TARGET_PAGE_BITS;
/* Flush async buffers before un-protect. */ /* Flush async buffers before un-protect. */
qemu_fflush(rs->f); qemu_fflush(rs->f);
@ -2230,7 +2230,7 @@ static int ram_save_host_page(RAMState *rs, PageSearchStatus *pss)
offset_in_ramblock(pss->block, offset_in_ramblock(pss->block,
((ram_addr_t)pss->page) << TARGET_PAGE_BITS)); ((ram_addr_t)pss->page) << TARGET_PAGE_BITS));
/* The offset we leave with is the min boundary of host page and block */ /* The offset we leave with is the min boundary of host page and block */
pss->page = MIN(pss->page, hostpage_boundary) - 1; pss->page = MIN(pss->page, hostpage_boundary);
res = ram_save_release_protection(rs, pss, start_page); res = ram_save_release_protection(rs, pss, start_page);
return (res < 0 ? res : pages); return (res < 0 ? res : pages);