Previously, writing BAT page was synchronous, so we could use on-stack bio_vec for that. But after it became asynchronous, we can't do that. Strange, this has not fired earlier.
https://jira.sw.ru/browse/PSBM-135137 Fixes: bfc5eaaba897 "ploop: Async md writeback" Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com> --- drivers/md/dm-ploop-map.c | 12 ++++++------ drivers/md/dm-ploop.h | 1 + 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/md/dm-ploop-map.c b/drivers/md/dm-ploop-map.c index 4cadf6e45b4d..a558445a1bec 100644 --- a/drivers/md/dm-ploop-map.c +++ b/drivers/md/dm-ploop-map.c @@ -1595,17 +1595,17 @@ void ploop_index_wb_submit(struct ploop *ploop, struct ploop_index_wb *piwb) { loff_t pos = (loff_t)piwb->page_id << PAGE_SHIFT; struct pio *pio = piwb->pio; - struct bio_vec bvec = { - .bv_page = piwb->bat_page, - .bv_len = PAGE_SIZE, - .bv_offset = 0, - }; + struct bio_vec *bvec = &piwb->aux_bvec; + + bvec->bv_page = piwb->bat_page; + bvec->bv_len = PAGE_SIZE; + bvec->bv_offset = 0; pio->bi_iter.bi_sector = to_sector(pos); pio->bi_iter.bi_size = PAGE_SIZE; pio->bi_iter.bi_idx = 0; pio->bi_iter.bi_bvec_done = 0; - pio->bi_io_vec = &bvec; + pio->bi_io_vec = bvec; pio->level = top_level(ploop); pio->endio_cb = md_write_endio; pio->endio_cb_data = piwb; diff --git a/drivers/md/dm-ploop.h b/drivers/md/dm-ploop.h index a7ca942c4670..0a4c6b78e20e 100644 --- a/drivers/md/dm-ploop.h +++ b/drivers/md/dm-ploop.h @@ -106,6 +106,7 @@ struct ploop_index_wb { bool completed; blk_status_t bi_status; u32 page_id; + struct bio_vec aux_bvec; }; /* Metadata page */ _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
