diff options
Diffstat (limited to 'storage/innobase/btr/btr0cur.cc')
| -rw-r--r-- | storage/innobase/btr/btr0cur.cc | 36 |
1 files changed, 15 insertions, 21 deletions
diff --git a/storage/innobase/btr/btr0cur.cc b/storage/innobase/btr/btr0cur.cc index 69bd2ecff0b..d8e9436e34a 100644 --- a/storage/innobase/btr/btr0cur.cc +++ b/storage/innobase/btr/btr0cur.cc @@ -3308,28 +3308,22 @@ upd_sys: /** Prefetch siblings of the leaf for the pessimistic operation. @param block leaf page */ -static -void -btr_cur_prefetch_siblings( - buf_block_t* block) +static void btr_cur_prefetch_siblings(const buf_block_t* block) { - page_t* page = buf_block_get_frame(block); - - ut_ad(page_is_leaf(page)); - - ulint left_page_no = fil_page_get_prev(page); - ulint right_page_no = fil_page_get_next(page); - - if (left_page_no != FIL_NULL) { - buf_read_page_background( - page_id_t(block->page.id.space(), left_page_no), - block->zip_size(), false); - } - if (right_page_no != FIL_NULL) { - buf_read_page_background( - page_id_t(block->page.id.space(), right_page_no), - block->zip_size(), false); - } + const page_t *page= block->frame; + ut_ad(page_is_leaf(page)); + + uint32_t left_page_no= mach_read_from_4(my_assume_aligned<4> + (page + FIL_PAGE_PREV)); + uint32_t right_page_no= mach_read_from_4(my_assume_aligned<4> + (page + FIL_PAGE_NEXT)); + + if (left_page_no != FIL_NULL) + buf_read_page_background(page_id_t(block->page.id.space(), left_page_no), + block->zip_size(), false); + if (right_page_no != FIL_NULL) + buf_read_page_background(page_id_t(block->page.id.space(), right_page_no), + block->zip_size(), false); } /*************************************************************//** |