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Queue and pop precisely the same amount of work in flush_request to ensure all work is cleared and there isn't an uneven add/remove possible.

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This commit is contained in:
Con Kolivas 2011-07-05 10:47:47 +10:00
parent af6e7937ca
commit f90e73af51
1 changed files with 8 additions and 11 deletions
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19
main.c
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@ -719,27 +719,24 @@ static bool discard_request(void)
static void flush_requests(void) static void flush_requests(void)
{ {
unsigned int i; int i, extra;
/* Queue a whole batch of new requests */ extra = requests_queued();
for (i = 0; i < opt_queue; i++) { for (i = 0; i < extra; i++) {
/* Queue a whole batch of new requests */
if (unlikely(!queue_request())) { if (unlikely(!queue_request())) {
applog(LOG_ERR, "Failed to queue requests in flush_requests"); applog(LOG_ERR, "Failed to queue requests in flush_requests");
kill_work(); kill_work();
return; break;
} }
} /* Pop off the old requests. Cancelling the requests would be better
* but is tricky */
/* Pop off the old requests. Cancelling the requests would be better
* but is tricky */
while (requests_queued() > opt_queue) {
if (unlikely(!discard_request())) { if (unlikely(!discard_request())) {
applog(LOG_ERR, "Failed to discard requests in flush_requests"); applog(LOG_ERR, "Failed to discard requests in flush_requests");
kill_work(); kill_work();
return; break;
} }
} }
} }
static bool get_work(struct work *work, bool queued) static bool get_work(struct work *work, bool queued)