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authorHannes Reinecke <hare@suse.de>2020-05-19 11:14:23 +0300
committerMike Snitzer <snitzer@redhat.com>2020-05-21 00:09:52 +0300
commita16b7dee302d2040d9e1fedff2161d1aceda0e8c (patch)
tree1515146f96d66caa920ab522ac15dd71daabe89f /drivers/md
parentc5c7885952927384837a070793698d996cb0fbf3 (diff)
downloadlinux-a16b7dee302d2040d9e1fedff2161d1aceda0e8c.tar.xz
dm zoned: terminate reclaim on congestion
When dmz_get_chunk_mapping() selects a zone which is under reclaim we should terminate the reclaim copy process. Since we're changing the zone itself, reclaim needs to run afterwards again anyway. Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-zoned-metadata.c2
-rw-r--r--drivers/md/dm-zoned-reclaim.c6
-rw-r--r--drivers/md/dm-zoned.h3
3 files changed, 9 insertions, 2 deletions
diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c
index b5fd67eff046..db0dc2b5d44d 100644
--- a/drivers/md/dm-zoned-metadata.c
+++ b/drivers/md/dm-zoned-metadata.c
@@ -1851,7 +1851,9 @@ static void dmz_wait_for_reclaim(struct dmz_metadata *zmd, struct dm_zone *zone)
{
dmz_unlock_map(zmd);
dmz_unlock_metadata(zmd);
+ set_bit(DMZ_RECLAIM_TERMINATE, &zone->flags);
wait_on_bit_timeout(&zone->flags, DMZ_RECLAIM, TASK_UNINTERRUPTIBLE, HZ);
+ clear_bit(DMZ_RECLAIM_TERMINATE, &zone->flags);
dmz_lock_metadata(zmd);
dmz_lock_map(zmd);
}
diff --git a/drivers/md/dm-zoned-reclaim.c b/drivers/md/dm-zoned-reclaim.c
index d62f6890b92c..571bc1d41bab 100644
--- a/drivers/md/dm-zoned-reclaim.c
+++ b/drivers/md/dm-zoned-reclaim.c
@@ -143,6 +143,9 @@ static int dmz_reclaim_copy(struct dmz_reclaim *zrc,
if (dst_dev->flags & DMZ_BDEV_DYING)
return -EIO;
+ if (dmz_reclaim_should_terminate(src_zone))
+ return -EINTR;
+
/* Get a valid region from the source zone */
ret = dmz_first_valid_block(zmd, src_zone, &block);
if (ret <= 0)
@@ -515,7 +518,7 @@ static void dmz_reclaim_work(struct work_struct *work)
dmz_nr_rnd_zones(zmd));
ret = dmz_do_reclaim(zrc);
- if (ret) {
+ if (ret && ret != -EINTR) {
DMDEBUG("(%s): Reclaim error %d",
dmz_metadata_label(zmd), ret);
if (!dmz_check_dev(zmd))
@@ -615,4 +618,3 @@ void dmz_schedule_reclaim(struct dmz_reclaim *zrc)
if (dmz_should_reclaim(zrc, p_unmap))
mod_delayed_work(zrc->wq, &zrc->work, 0);
}
-
diff --git a/drivers/md/dm-zoned.h b/drivers/md/dm-zoned.h
index 288054dd7cf4..8083607b9535 100644
--- a/drivers/md/dm-zoned.h
+++ b/drivers/md/dm-zoned.h
@@ -127,6 +127,7 @@ enum {
/* Zone internal state */
DMZ_RECLAIM,
DMZ_SEQ_WRITE_ERR,
+ DMZ_RECLAIM_TERMINATE,
};
/*
@@ -140,6 +141,8 @@ enum {
#define dmz_is_readonly(z) test_bit(DMZ_READ_ONLY, &(z)->flags)
#define dmz_in_reclaim(z) test_bit(DMZ_RECLAIM, &(z)->flags)
#define dmz_seq_write_err(z) test_bit(DMZ_SEQ_WRITE_ERR, &(z)->flags)
+#define dmz_reclaim_should_terminate(z) \
+ test_bit(DMZ_RECLAIM_TERMINATE, &(z)->flags)
#define dmz_is_meta(z) test_bit(DMZ_META, &(z)->flags)
#define dmz_is_buf(z) test_bit(DMZ_BUF, &(z)->flags)