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From ff8a74250209f4279f67dd89c3e57b2289a1b7d1 Mon Sep 17 00:00:00 2001
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From: Xavi Hernandez <xhernandez@redhat.com>
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Date: Thu, 9 May 2019 11:07:18 +0200
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Subject: [PATCH 144/169] cluster/ec: honor contention notifications for
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partially acquired locks
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EC was ignoring lock contention notifications received while a lock was
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being acquired. When a lock is partially acquired (some bricks have
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granted the lock but some others not yet) we can receive notifications
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from acquired bricks, which should be honored, since we may not receive
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more notifications after that.
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Since EC was ignoring them, once the lock was acquired, it was not
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released until the eager-lock timeout, causing unnecessary delays on
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other clients.
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This fix takes into consideration the notifications received before
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having completed the full lock acquisition. After that, the lock will
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be releaed as soon as possible.
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Upstream patch:
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> BUG: 1708156
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> Upstream patch link: https://review.gluster.org/c/glusterfs/+/22690
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> Change-Id: I2a306dbdb29fb557dcab7788a258bd75d826cc12
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> Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>
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Fixes: bz#1703455
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Change-Id: I2a306dbdb29fb557dcab7788a258bd75d826cc12
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Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>
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Reviewed-on: https://code.engineering.redhat.com/gerrit/171525
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Tested-by: RHGS Build Bot <nigelb@redhat.com>
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Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
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---
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...or-inodelk-contention-notify-on-partial-locks.t | 54 ++++++++++++++++++++++
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xlators/cluster/ec/src/ec-common.c | 2 +-
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2 files changed, 55 insertions(+), 1 deletion(-)
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create mode 100644 tests/bugs/ec/bug-1708156-honor-inodelk-contention-notify-on-partial-locks.t
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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
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new file mode 100644
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index 0000000..67fdb18
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--- /dev/null
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+++ b/tests/bugs/ec/bug-1708156-honor-inodelk-contention-notify-on-partial-locks.t
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@@ -0,0 +1,54 @@
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+#!/bin/bash
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+
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+. $(dirname $0)/../../include.rc
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+. $(dirname $0)/../../volume.rc
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+
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+function do_ls() {
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+ local dir="${1}"
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+ local i
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+
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+ for i in {1..50}; do
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+ ls -l $M0/${dir} >/dev/null &
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+ ls -l $M1/${dir} >/dev/null &
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+ ls -l $M2/${dir} >/dev/null &
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+ ls -l $M3/${dir} >/dev/null &
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+ done
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+ wait
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+}
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+
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+function measure_time() {
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+ {
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+ LC_ALL=C
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+ time -p "${@}"
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+ } 2>&1 | awk '/^real/ { print $2 * 1000 }'
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+}
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+
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+cleanup
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+
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+TEST glusterd
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+TEST pidof glusterd
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+TEST $CLI volume create $V0 disperse 6 redundancy 2 $H0:$B0/${V0}{0..5}
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+
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+TEST $CLI volume set $V0 disperse.eager-lock on
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+TEST $CLI volume set $V0 disperse.other-eager-lock on
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+TEST $CLI volume set $V0 features.locks-notify-contention on
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+TEST $CLI volume set $V0 disperse.eager-lock-timeout 10
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+TEST $CLI volume set $V0 disperse.other-eager-lock-timeout 10
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+
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+TEST $CLI volume start $V0
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+TEST $GFS --volfile-id=/$V0 --volfile-server=$H0 $M0
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+TEST $GFS --volfile-id=/$V0 --volfile-server=$H0 $M1
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+TEST $GFS --volfile-id=/$V0 --volfile-server=$H0 $M2
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+TEST $GFS --volfile-id=/$V0 --volfile-server=$H0 $M3
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+EXPECT_WITHIN $CHILD_UP_TIMEOUT "6" ec_child_up_count $V0 0 $M0
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+EXPECT_WITHIN $CHILD_UP_TIMEOUT "6" ec_child_up_count $V0 0 $M1
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+EXPECT_WITHIN $CHILD_UP_TIMEOUT "6" ec_child_up_count $V0 0 $M2
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+EXPECT_WITHIN $CHILD_UP_TIMEOUT "6" ec_child_up_count $V0 0 $M3
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+TEST mkdir $M0/dir
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+TEST touch $M0/dir/file.{1..10}
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+
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+# Run multiple 'ls' concurrently from multiple clients so that they collide and
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+# cause partial locks.
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+TEST [[ $(measure_time do_ls dir) -lt 10000 ]]
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+
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+cleanup
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diff --git a/xlators/cluster/ec/src/ec-common.c b/xlators/cluster/ec/src/ec-common.c
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index b1ba5e9..e85aa8b 100644
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--- a/xlators/cluster/ec/src/ec-common.c
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+++ b/xlators/cluster/ec/src/ec-common.c
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@@ -2497,7 +2497,7 @@ ec_lock_release(ec_t *ec, inode_t *inode)
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goto done;
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}
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lock = ctx->inode_lock;
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- if ((lock == NULL) || !lock->acquired || lock->release) {
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+ if ((lock == NULL) || lock->release) {
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goto done;
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}
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--
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1.8.3.1
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