From: "Matias Bjørling" <mb@lightnvm.io>
To: axboe@fb.com
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
"Javier González" <javier@javigon.com>,
"Javier González" <javier@cnexlabs.com>,
"Matias Bjørling" <mb@lightnvm.io>
Subject: [GIT PULL 13/21] lightnvm: pblk: add comments wrt locking in recovery path
Date: Tue, 11 Dec 2018 20:16:19 +0100 [thread overview]
Message-ID: <20181211191627.15542-14-mb@lightnvm.io> (raw)
In-Reply-To: <20181211191627.15542-1-mb@lightnvm.io>
From: Javier González <javier@javigon.com>
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 <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
---
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"
--
2.17.1
next prev parent reply other threads:[~2018-12-11 19:17 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-11 19:16 [GIT PULL 00/21] lightnvm updates for 4.21 Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 01/21] lightnvm: pblk: ignore the smeta oob area scan Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 02/21] lightnvm: Fix uninitialized return value in nvm_get_chunk_meta() Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 03/21] lightnvm: pblk: fix chunk close trace event check Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 04/21] lightnvm: pblk: fix resubmission of overwritten write err lbas Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 05/21] lightnvm: pblk: account for write error sectors in emeta Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 06/21] lightnvm: pblk: stop writes gracefully when running out of lines Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 07/21] lightnvm: pblk: set conservative threshold for user writes Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 08/21] lightnvm: pblk: remove unused macro Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 09/21] lightnvm: pblk: fix pblk_lines_init error handling path Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 10/21] lightnvm: pblk: remove dead code in pblk_recov_l2p Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 11/21] lightnvm: pblk: fix spelling in comment Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 12/21] lightnvm: pblk: add lock protection to list operations Matias Bjørling
2018-12-11 19:16 ` Matias Bjørling [this message]
2018-12-11 19:16 ` [GIT PULL 14/21] lightnvm: simplify geometry enumeration Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 15/21] lightnvm: pblk: avoid ref warning on cache creation Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 16/21] lightnvm: pblk: move lba list to partial read context Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 17/21] lightnvm: pblk: add helpers for OOB metadata Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 18/21] lightnvm: dynamic DMA pool entry size Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 19/21] lightnvm: disable interleaved metadata Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 20/21] lightnvm: pblk: support packed metadata Matias Bjørling
2018-12-11 19:16 ` [GIT PULL 21/21] lightnvm: pblk: do not overwrite ppa list with meta list Matias Bjørling
2018-12-11 19:23 ` [GIT PULL 00/21] lightnvm updates for 4.21 Jens Axboe
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