Patch "lightnvm: pblk: fix changing GC group list for a line" has been added to the 4.14-stable tree

Patch "lightnvm: pblk: fix changing GC group list for a line" has been added to the 4.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    lightnvm: pblk: fix changing GC group list for a line

to the 4.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     lightnvm-pblk-fix-changing-gc-group-list-for-a-line.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Dec 18 13:29:00 CET 2017
From: Rakesh Pandit <rakesh@tuxera.com>
Date: Fri, 13 Oct 2017 14:46:28 +0200
Subject: lightnvm: pblk: fix changing GC group list for a line

From: Rakesh Pandit <rakesh@tuxera.com>


[ Upstream commit 27b978725d895e704aab44b99242a0514485d798 ]

pblk_line_gc_list seems to had a bug since the introduction of pblk in
getting GC list for a line. In b20ba1bc7 while redesigning the GC
algorithm, the naming for the GC thresholds was altered, but the
values for high_thrs and mid_thrs were not. The result is that when
moving to the GC lists, the mid threshold is never evaluated.

Fixes: a4bd217b4("lightnvm: physical block device (pblk) target")
Signed-off-by: Rakesh Pandit <rakesh@tuxera.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/lightnvm/pblk-init.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -681,8 +681,8 @@ static int pblk_lines_init(struct pblk *
 	lm->blk_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long);
 	lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long);
 	lm->lun_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long);
-	lm->high_thrs = lm->sec_per_line / 2;
-	lm->mid_thrs = lm->sec_per_line / 4;
+	lm->mid_thrs = lm->sec_per_line / 2;
+	lm->high_thrs = lm->sec_per_line / 4;
 	lm->meta_distance = (geo->nr_luns / 2) * pblk->min_write_pgs;
 
 	/* Calculate necessary pages for smeta. See comment over struct


Patches currently in stable-queue which might be from rakesh@tuxera.com are

queue-4.14/lightnvm-pblk-protect-line-bitmap-while-submitting-meta-io.patch
queue-4.14/lightnvm-pblk-fix-changing-gc-group-list-for-a-line.patch