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From 57c79ed20cb73aa9aa4dd7487379b85ea3f936f6 Mon Sep 17 00:00:00 2001
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From: Hanna Reitz <hreitz@redhat.com>
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Date: Wed, 9 Nov 2022 17:54:49 +0100
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Subject: [PATCH 02/11] block/mirror: Drop mirror_wait_for_any_operation()
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RH-Author: Hanna Czenczek <hreitz@redhat.com>
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RH-MergeRequest: 246: block/mirror: Make active mirror progress even under full load
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RH-Bugzilla: 2125119
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RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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RH-Commit: [2/3] dec37883bcc491441ae08d9592d1ec26a47765c0
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mirror_wait_for_free_in_flight_slot() is the only remaining user of
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mirror_wait_for_any_operation(), so inline the latter into the former.
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Signed-off-by: Hanna Reitz <hreitz@redhat.com>
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Message-Id: <20221109165452.67927-3-hreitz@redhat.com>
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Reviewed-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit eb994912993077f178ccb43b20e422ecf9ae4ac7)
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Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
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---
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block/mirror.c | 21 ++++++++-------------
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1 file changed, 8 insertions(+), 13 deletions(-)
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diff --git a/block/mirror.c b/block/mirror.c
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index 282f428cb7..6b02555ad7 100644
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--- a/block/mirror.c
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+++ b/block/mirror.c
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@@ -304,19 +304,21 @@ static int mirror_cow_align(MirrorBlockJob *s, int64_t *offset,
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}
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static inline void coroutine_fn
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-mirror_wait_for_any_operation(MirrorBlockJob *s, bool active)
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+mirror_wait_for_free_in_flight_slot(MirrorBlockJob *s)
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{
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MirrorOp *op;
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QTAILQ_FOREACH(op, &s->ops_in_flight, next) {
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- /* Do not wait on pseudo ops, because it may in turn wait on
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+ /*
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+ * Do not wait on pseudo ops, because it may in turn wait on
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* some other operation to start, which may in fact be the
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* caller of this function. Since there is only one pseudo op
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* at any given time, we will always find some real operation
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- * to wait on. */
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- if (!op->is_pseudo_op && op->is_in_flight &&
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- op->is_active_write == active)
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- {
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+ * to wait on.
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+ * Also, do not wait on active operations, because they do not
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+ * use up in-flight slots.
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+ */
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+ if (!op->is_pseudo_op && op->is_in_flight && !op->is_active_write) {
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qemu_co_queue_wait(&op->waiting_requests, NULL);
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return;
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}
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@@ -324,13 +326,6 @@ mirror_wait_for_any_operation(MirrorBlockJob *s, bool active)
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abort();
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}
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-static inline void coroutine_fn
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-mirror_wait_for_free_in_flight_slot(MirrorBlockJob *s)
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-{
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- /* Only non-active operations use up in-flight slots */
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- mirror_wait_for_any_operation(s, false);
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-}
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-
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/* Perform a mirror copy operation.
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*
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* *op->bytes_handled is set to the number of bytes copied after and
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--
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2.37.3
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