From 361d889f830ef61e4eae442c4c89fb14b626375f Mon Sep 17 00:00:00 2001 From: Javier González Date: Tue, 11 Dec 2018 20:16:19 +0100 Subject: lightnvm: pblk: add comments wrt locking in recovery path MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit pblk's recovery path is single threaded and therefore a number of assumptions regarding concurrency can be made. To avoid confusion, make this explicit with a couple of comments in the code. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk-core.c | 1 + drivers/lightnvm/pblk-recovery.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c index 44c5dc046912..f1b411e7c7c9 100644 --- a/drivers/lightnvm/pblk-core.c +++ b/drivers/lightnvm/pblk-core.c @@ -1276,6 +1276,7 @@ static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line) return 0; } +/* Line allocations in the recovery path are always single threaded */ int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line) { struct pblk_line_mgmt *l_mg = &pblk->l_mg; diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c index 416d9840544b..4c726506a831 100644 --- a/drivers/lightnvm/pblk-recovery.c +++ b/drivers/lightnvm/pblk-recovery.c @@ -13,6 +13,9 @@ * General Public License for more details. * * pblk-recovery.c - pblk's recovery path + * + * The L2P recovery path is single threaded as the L2P table is updated in order + * following the line sequence ID. */ #include "pblk.h" -- cgit v1.2.3