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s4-repl: ensure we don't starve pending replication ops

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when there was a continuous sequence of notify ops, we could leave the
replication ops starving. This ensures we run whichever was queued
first
This commit is contained in:
Andrew Tridgell 2010-11-17 23:12:10 +11:00
parent e17ea9f3f5
commit 73016ad405
4 changed files with 24 additions and 6 deletions
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4
source4/dsdb/repl/drepl_notify.c
View File

@ -228,7 +228,7 @@ static void dreplsrv_notify_op_callback(struct tevent_req *subreq)
talloc_free(op);
s->ops.n_current = NULL;
dreplsrv_notify_run_ops(s);
dreplsrv_run_pending_ops(s);
}
/*
@ -343,6 +343,7 @@ static WERROR dreplsrv_schedule_notify_sync(struct dreplsrv_service *service,
op->uSN = uSN;
op->is_urgent = is_urgent;
op->replica_flags = replica_flags;
op->schedule_time = time(NULL);
DLIST_ADD_END(service->ops.notifies, op, struct dreplsrv_notify_operation *);
talloc_steal(service, op);
@ -499,5 +500,4 @@ static void dreplsrv_notify_run(struct dreplsrv_service *service)
talloc_free(mem_ctx);
dreplsrv_run_pending_ops(service);
dreplsrv_notify_run_ops(service);
}

6
source4/dsdb/repl/drepl_out_pull.c
View File

@ -52,6 +52,7 @@ WERROR dreplsrv_schedule_partition_pull_source(struct dreplsrv_service *s,
op->fsmo_info = fsmo_info;
op->callback = callback;
op->cb_data = cb_data;
op->schedule_time = time(NULL);
DLIST_ADD_END(s->ops.pending, op, struct dreplsrv_out_operation *);
@ -126,17 +127,16 @@ done:
talloc_free(op);
s->ops.current = NULL;
dreplsrv_run_pending_ops(s);
dreplsrv_notify_run_ops(s);
}
void dreplsrv_run_pending_ops(struct dreplsrv_service *s)
void dreplsrv_run_pull_ops(struct dreplsrv_service *s)
{
struct dreplsrv_out_operation *op;
time_t t;
NTTIME now;
struct tevent_req *subreq;
if (s->ops.current || s->ops.n_current) {
if (s->ops.current) {
/* if there's still one running, we're done */
return;
}

18
source4/dsdb/repl/drepl_periodic.c
View File

@ -116,5 +116,21 @@ static void dreplsrv_periodic_run(struct dreplsrv_service *service)
dreplsrv_ridalloc_check_rid_pool(service);
dreplsrv_run_pending_ops(service);
dreplsrv_notify_run_ops(service);
}
/*
run the next pending op, either a notify or a pull
*/
void dreplsrv_run_pending_ops(struct dreplsrv_service *s)
{
if (!s->ops.notifies && !s->ops.pending) {
return;
}
if (!s->ops.notifies ||
(s->ops.pending &&
s->ops.notifies->schedule_time > s->ops.pending->schedule_time)) {
dreplsrv_run_pull_ops(s);
} else {
dreplsrv_notify_run_ops(s);
}
}

2
source4/dsdb/repl/drepl_service.h
View File

@ -119,6 +119,7 @@ typedef void (*dreplsrv_extended_callback_t)(struct dreplsrv_service *,
struct dreplsrv_out_operation {
struct dreplsrv_out_operation *prev, *next;
time_t schedule_time;
struct dreplsrv_service *service;
@ -133,6 +134,7 @@ struct dreplsrv_out_operation {
struct dreplsrv_notify_operation {
struct dreplsrv_notify_operation *prev, *next;
time_t schedule_time;
struct dreplsrv_service *service;
uint64_t uSN;