From 8a57fc3823d08edb1661a06d9e0a8c2365ac561e Mon Sep 17 00:00:00 2001 From: Zhoujie Wu <zjwu@marvell.com> Date: Tue, 9 Oct 2018 13:12:14 +0200 Subject: [PATCH] lightnvm: pblk: consider max hw sectors supported for max_write_pgs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When do GC, the number of read/write sectors are determined by max_write_pgs(see gc_rq preparation in pblk_gc_line_prepare_ws). Due to max_write_pgs doesn't consider max hw sectors supported by nvme controller(128K), which leads to GC tries to read 64 * 4K in one command, and see below error caused by pblk_bio_map_addr in function pblk_submit_read_gc. [ 2923.005376] pblk: could not add page to bio [ 2923.005377] pblk: could not allocate GC bio (18446744073709551604) Signed-off-by: Zhoujie Wu <zjwu@marvell.com> Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk> --- drivers/lightnvm/pblk-init.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index e3573880dbda0..e5239aba806b6 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -407,6 +407,8 @@ static int pblk_core_init(struct pblk *pblk) pblk->min_write_pgs = geo->ws_opt; max_write_ppas = pblk->min_write_pgs * geo->all_luns; pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA); + pblk->max_write_pgs = min_t(int, pblk->max_write_pgs, + queue_max_hw_sectors(dev->q) / (geo->csecs >> SECTOR_SHIFT)); pblk_set_sec_per_write(pblk, pblk->min_write_pgs); pblk->pad_dist = kcalloc(pblk->min_write_pgs - 1, sizeof(atomic64_t), -- GitLab