diff options
Diffstat (limited to 'mm/backing-dev.c')
| -rw-r--r-- | mm/backing-dev.c | 24 |
1 files changed, 5 insertions, 19 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index bfbd7096b6ed..ed173b8ae8f2 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -898,7 +898,7 @@ static atomic_t nr_wb_congested[2]; void clear_wb_congested(struct bdi_writeback_congested *congested, int sync) { wait_queue_head_t *wqh = &congestion_wqh[sync]; - enum wb_state bit; + enum wb_congested_state bit; bit = sync ? WB_sync_congested : WB_async_congested; if (test_and_clear_bit(bit, &congested->state)) @@ -911,7 +911,7 @@ EXPORT_SYMBOL(clear_wb_congested); void set_wb_congested(struct bdi_writeback_congested *congested, int sync) { - enum wb_state bit; + enum wb_congested_state bit; bit = sync ? WB_sync_congested : WB_async_congested; if (!test_and_set_bit(bit, &congested->state)) @@ -957,9 +957,8 @@ EXPORT_SYMBOL(congestion_wait); * jiffies for either a BDI to exit congestion of the given @sync queue * or a write to complete. * - * In the absence of zone congestion, a short sleep or a cond_resched is - * performed to yield the processor and to allow other subsystems to make - * a forward progress. + * In the absence of zone congestion, cond_resched() is called to yield + * the processor if necessary but otherwise does not sleep. * * The return value is 0 if the sleep is for the full timeout. Otherwise, * it is the number of jiffies that were still remaining when the function @@ -979,20 +978,7 @@ long wait_iff_congested(struct zone *zone, int sync, long timeout) */ if (atomic_read(&nr_wb_congested[sync]) == 0 || !test_bit(ZONE_CONGESTED, &zone->flags)) { - - /* - * Memory allocation/reclaim might be called from a WQ - * context and the current implementation of the WQ - * concurrency control doesn't recognize that a particular - * WQ is congested if the worker thread is looping without - * ever sleeping. Therefore we have to do a short sleep - * here rather than calling cond_resched(). - */ - if (current->flags & PF_WQ_WORKER) - schedule_timeout_uninterruptible(1); - else - cond_resched(); - + cond_resched(); /* In case we scheduled, work out time remaining */ ret = timeout - (jiffies - start); if (ret < 0) |