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charset="utf-8" The overhead of the mutex in non-multifd mode is negligible, because in that case its just the single thread taking the mutex. This will be used in the next commits to add colo support to multifd. Signed-off-by: Lukas Straub --- migration/ram.c | 17 ++++++++++++++--- migration/ram.h | 1 + 2 files changed, 15 insertions(+), 3 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 5e7bf20ca5..2d3fd2112a 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -3633,6 +3633,18 @@ static ram_addr_t host_page_offset_from_ram_block_of= fset(RAMBlock *block, return ((uintptr_t)block->host + offset) & (block->page_size - 1); } =20 +void colo_record_bitmap(RAMBlock *block, ram_addr_t *normal, uint normal_n= um) +{ + qemu_mutex_lock(&ram_state->bitmap_mutex); + for (int i =3D 0; i < normal_num; i++) { + ram_addr_t offset =3D normal[i]; + ram_state->migration_dirty_pages +=3D !test_and_set_bit( + offset >> TARGET_PAGE_BITS, + block->bmap); + } + qemu_mutex_unlock(&ram_state->bitmap_mutex); +} + static inline void *colo_cache_from_block_offset(RAMBlock *block, ram_addr_t offset, bool record_bitmap) { @@ -3650,9 +3662,8 @@ static inline void *colo_cache_from_block_offset(RAMB= lock *block, * It help us to decide which pages in ram cache should be flushed * into VM's RAM later. */ - if (record_bitmap && - !test_and_set_bit(offset >> TARGET_PAGE_BITS, block->bmap)) { - ram_state->migration_dirty_pages++; + if (record_bitmap) { + colo_record_bitmap(block, &offset, 1); } return block->colo_cache + offset; } diff --git a/migration/ram.h b/migration/ram.h index 6fffbeb5f1..887d1fbae6 100644 --- a/migration/ram.h +++ b/migration/ram.h @@ -82,6 +82,7 @@ int colo_init_ram_cache(void); void colo_flush_ram_cache(void); void colo_release_ram_cache(void); void colo_incoming_start_dirty_log(void); +void colo_record_bitmap(RAMBlock *block, ram_addr_t *normal, uint normal_n= um); =20 /* Background snapshot */ bool ram_write_tracking_available(void); --=20 2.39.2 --Sig_/I3MFa6umhU/ggOdWlvjgxSS Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEg/qxWKDZuPtyYo+kNasLKJxdslgFAmRYR9EACgkQNasLKJxd slgizxAAnPToGeBo8BuYUwmb6px8xRhcqxYavf5CaHIvTS7yk7gDBxa579QG4rb6 Syyoo1n0jIwHXyOoy+8xLZw/FcU5vI4aS74OmNnqqiDX6EVe5LCRRUx8iNoziMIq ULjGSsk3I5Wb+X5vwi2O/sXQVwcsqsGSxGPm23qjB+gsYZoE6ZvLfMh6IG4bFNuO XmCB/XEKP4fhxW7RiAbTDhHACriZyiyPOPRAKgHIdniUZeLz34VXL2QTIpiqvM0U KZmplGCGJEctVNysqIMWlqTEyoXKT+K1ZFm0/HCr8qB9ApGi67YY9vE3HB4P96US vRdz84JvcHSiau2ySSWY94U7B+O84GWxH0uOmNK05wSlCVyAf2KI4P8yFfQBSEkv wPgV0QaojkY5kDH1H/UNHn4EypcYnWDtjXGxiImS+Ky6YviuShxCC8pARyVPQELx y8ZC+0Mv4sZXAdC4sIPN38W2y0FtiOiZakbw/bKkAGMbUHZAg+MlJ6H3vTidv60d IRkyHyYzWZgNiF1FzrsF4KzS+a5guxqkaPn4ssc3OsD+VAi3jW1VHvllovKfMzMs kkMDjCgntxsBUQqKhYy85Ar+LRz0ofIW8DfPbINAFyWvR11ljc6Vu6KNvbtU3n+N QuOm1UotS8DT0RhibWWTXeUuQa8/aMIcYmlRLX4DmHdUjgsTWBo= =639H -----END PGP SIGNATURE----- --Sig_/I3MFa6umhU/ggOdWlvjgxSS--