From: Zhoujie Wu Date: Tue, 9 Oct 2018 11:12:14 +0000 (+0200) Subject: lightnvm: pblk: consider max hw sectors supported for max_write_pgs X-Git-Tag: v4.20-rc1~191^2~50 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=8a57fc3823d08edb1661a06d9e0a8c2365ac561e;p=uclinux-h8%2Flinux.git lightnvm: pblk: consider max hw sectors supported for max_write_pgs 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 Reviewed-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index e3573880dbda..e5239aba806b 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),