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authorXavi Hernandez <xhernandez@redhat.com>2019-05-09 11:07:18 +0200
committerAmar Tumballi <amarts@redhat.com>2019-06-03 04:08:06 +0000
commit7a387f97315f55e1c741d6ad749fb5621f067de0 (patch)
tree9556c96c5415815d1de1eaebb892b89276b09897
parent8c0bb45c9f002461d5c4a63e35ae215958405fb5 (diff)
cluster/ec: honor contention notifications for partially acquired locks
EC was ignoring lock contention notifications received while a lock was being acquired. When a lock is partially acquired (some bricks have granted the lock but some others not yet) we can receive notifications from acquired bricks, which should be honored, since we may not receive more notifications after that. Since EC was ignoring them, once the lock was acquired, it was not released until the eager-lock timeout, causing unnecessary delays on other clients. This fix takes into consideration the notifications received before having completed the full lock acquisition. After that, the lock will be releaed as soon as possible. Backport of: > BUG: bz#1708156 > Change-Id: I2a306dbdb29fb557dcab7788a258bd75d826cc12 > Signed-off-by: Xavi Hernandez <xhernandez@redhat.com> Fixes: bz#1714172 Change-Id: I2a306dbdb29fb557dcab7788a258bd75d826cc12 Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>
-rw-r--r--tests/bugs/ec/bug-1708156-honor-inodelk-contention-notify-on-partial-locks.t54
-rw-r--r--xlators/cluster/ec/src/ec-common.c2
2 files changed, 55 insertions, 1 deletions
diff --git a/tests/bugs/ec/bug-1708156-honor-inodelk-contention-notify-on-partial-locks.t b/tests/bugs/ec/bug-1708156-honor-inodelk-contention-notify-on-partial-locks.t
new file mode 100644
index 0000000..67fdb18
--- /dev/null
+++ b/tests/bugs/ec/bug-1708156-honor-inodelk-contention-notify-on-partial-locks.t
@@ -0,0 +1,54 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+
+function do_ls() {
+ local dir="${1}"
+ local i
+
+ for i in {1..50}; do
+ ls -l $M0/${dir} >/dev/null &
+ ls -l $M1/${dir} >/dev/null &
+ ls -l $M2/${dir} >/dev/null &
+ ls -l $M3/${dir} >/dev/null &
+ done
+ wait
+}
+
+function measure_time() {
+ {
+ LC_ALL=C
+ time -p "${@}"
+ } 2>&1 | awk '/^real/ { print $2 * 1000 }'
+}
+
+cleanup
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 disperse 6 redundancy 2 $H0:$B0/${V0}{0..5}
+
+TEST $CLI volume set $V0 disperse.eager-lock on
+TEST $CLI volume set $V0 disperse.other-eager-lock on
+TEST $CLI volume set $V0 features.locks-notify-contention on
+TEST $CLI volume set $V0 disperse.eager-lock-timeout 10
+TEST $CLI volume set $V0 disperse.other-eager-lock-timeout 10
+
+TEST $CLI volume start $V0
+TEST $GFS --volfile-id=/$V0 --volfile-server=$H0 $M0
+TEST $GFS --volfile-id=/$V0 --volfile-server=$H0 $M1
+TEST $GFS --volfile-id=/$V0 --volfile-server=$H0 $M2
+TEST $GFS --volfile-id=/$V0 --volfile-server=$H0 $M3
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "6" ec_child_up_count $V0 0 $M0
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "6" ec_child_up_count $V0 0 $M1
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "6" ec_child_up_count $V0 0 $M2
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "6" ec_child_up_count $V0 0 $M3
+TEST mkdir $M0/dir
+TEST touch $M0/dir/file.{1..10}
+
+# Run multiple 'ls' concurrently from multiple clients so that they collide and
+# cause partial locks.
+TEST [[ $(measure_time do_ls dir) -lt 10000 ]]
+
+cleanup
diff --git a/xlators/cluster/ec/src/ec-common.c b/xlators/cluster/ec/src/ec-common.c
index b1ba5e9..e85aa8b 100644
--- a/xlators/cluster/ec/src/ec-common.c
+++ b/xlators/cluster/ec/src/ec-common.c
@@ -2497,7 +2497,7 @@ ec_lock_release(ec_t *ec, inode_t *inode)
goto done;
}
lock = ctx->inode_lock;
- if ((lock == NULL) || !lock->acquired || lock->release) {
+ if ((lock == NULL) || lock->release) {
goto done;
}