Lines Matching full:wb
49 struct bdi_writeback *wb = &bdi->wb; in bdi_debug_stats_show() local
57 spin_lock(&wb->list_lock); in bdi_debug_stats_show()
58 list_for_each_entry(inode, &wb->b_dirty, i_io_list) in bdi_debug_stats_show()
60 list_for_each_entry(inode, &wb->b_io, i_io_list) in bdi_debug_stats_show()
62 list_for_each_entry(inode, &wb->b_more_io, i_io_list) in bdi_debug_stats_show()
64 list_for_each_entry(inode, &wb->b_dirty_time, i_io_list) in bdi_debug_stats_show()
67 spin_unlock(&wb->list_lock); in bdi_debug_stats_show()
70 wb_thresh = wb_calc_thresh(wb, dirty_thresh); in bdi_debug_stats_show()
88 (unsigned long) K(wb_stat(wb, WB_WRITEBACK)), in bdi_debug_stats_show()
89 (unsigned long) K(wb_stat(wb, WB_RECLAIMABLE)), in bdi_debug_stats_show()
93 (unsigned long) K(wb_stat(wb, WB_DIRTIED)), in bdi_debug_stats_show()
94 (unsigned long) K(wb_stat(wb, WB_WRITTEN)), in bdi_debug_stats_show()
95 (unsigned long) K(wb->write_bandwidth), in bdi_debug_stats_show()
100 !list_empty(&bdi->bdi_list), bdi->wb.state); in bdi_debug_stats_show()
251 * This function is used when the first inode for this wb is marked dirty. It
264 void wb_wakeup_delayed(struct bdi_writeback *wb) in wb_wakeup_delayed() argument
269 spin_lock_bh(&wb->work_lock); in wb_wakeup_delayed()
270 if (test_bit(WB_registered, &wb->state)) in wb_wakeup_delayed()
271 queue_delayed_work(bdi_wq, &wb->dwork, timeout); in wb_wakeup_delayed()
272 spin_unlock_bh(&wb->work_lock); in wb_wakeup_delayed()
280 static int wb_init(struct bdi_writeback *wb, struct backing_dev_info *bdi, in wb_init() argument
285 memset(wb, 0, sizeof(*wb)); in wb_init()
287 if (wb != &bdi->wb) in wb_init()
289 wb->bdi = bdi; in wb_init()
290 wb->last_old_flush = jiffies; in wb_init()
291 INIT_LIST_HEAD(&wb->b_dirty); in wb_init()
292 INIT_LIST_HEAD(&wb->b_io); in wb_init()
293 INIT_LIST_HEAD(&wb->b_more_io); in wb_init()
294 INIT_LIST_HEAD(&wb->b_dirty_time); in wb_init()
295 spin_lock_init(&wb->list_lock); in wb_init()
297 wb->bw_time_stamp = jiffies; in wb_init()
298 wb->balanced_dirty_ratelimit = INIT_BW; in wb_init()
299 wb->dirty_ratelimit = INIT_BW; in wb_init()
300 wb->write_bandwidth = INIT_BW; in wb_init()
301 wb->avg_write_bandwidth = INIT_BW; in wb_init()
303 spin_lock_init(&wb->work_lock); in wb_init()
304 INIT_LIST_HEAD(&wb->work_list); in wb_init()
305 INIT_DELAYED_WORK(&wb->dwork, wb_workfn); in wb_init()
306 wb->dirty_sleep = jiffies; in wb_init()
308 err = fprop_local_init_percpu(&wb->completions, gfp); in wb_init()
313 err = percpu_counter_init(&wb->stat[i], 0, gfp); in wb_init()
322 percpu_counter_destroy(&wb->stat[i]); in wb_init()
323 fprop_local_destroy_percpu(&wb->completions); in wb_init()
325 if (wb != &bdi->wb) in wb_init()
330 static void cgwb_remove_from_bdi_list(struct bdi_writeback *wb);
335 static void wb_shutdown(struct bdi_writeback *wb) in wb_shutdown() argument
338 spin_lock_bh(&wb->work_lock); in wb_shutdown()
339 if (!test_and_clear_bit(WB_registered, &wb->state)) { in wb_shutdown()
340 spin_unlock_bh(&wb->work_lock); in wb_shutdown()
343 spin_unlock_bh(&wb->work_lock); in wb_shutdown()
345 cgwb_remove_from_bdi_list(wb); in wb_shutdown()
348 * tells wb_workfn() that @wb is dying and its work_list needs to in wb_shutdown()
351 mod_delayed_work(bdi_wq, &wb->dwork, 0); in wb_shutdown()
352 flush_delayed_work(&wb->dwork); in wb_shutdown()
353 WARN_ON(!list_empty(&wb->work_list)); in wb_shutdown()
356 static void wb_exit(struct bdi_writeback *wb) in wb_exit() argument
360 WARN_ON(delayed_work_pending(&wb->dwork)); in wb_exit()
363 percpu_counter_destroy(&wb->stat[i]); in wb_exit()
365 fprop_local_destroy_percpu(&wb->completions); in wb_exit()
366 if (wb != &wb->bdi->wb) in wb_exit()
367 bdi_put(wb->bdi); in wb_exit()
383 struct bdi_writeback *wb = container_of(work, struct bdi_writeback, in cgwb_release_workfn() local
385 struct blkcg *blkcg = css_to_blkcg(wb->blkcg_css); in cgwb_release_workfn()
387 mutex_lock(&wb->bdi->cgwb_release_mutex); in cgwb_release_workfn()
388 wb_shutdown(wb); in cgwb_release_workfn()
390 css_put(wb->memcg_css); in cgwb_release_workfn()
391 css_put(wb->blkcg_css); in cgwb_release_workfn()
392 mutex_unlock(&wb->bdi->cgwb_release_mutex); in cgwb_release_workfn()
397 fprop_local_destroy_percpu(&wb->memcg_completions); in cgwb_release_workfn()
398 percpu_ref_exit(&wb->refcnt); in cgwb_release_workfn()
399 wb_exit(wb); in cgwb_release_workfn()
400 kfree_rcu(wb, rcu); in cgwb_release_workfn()
405 struct bdi_writeback *wb = container_of(refcnt, struct bdi_writeback, in cgwb_release() local
407 queue_work(cgwb_release_wq, &wb->release_work); in cgwb_release()
410 static void cgwb_kill(struct bdi_writeback *wb) in cgwb_kill() argument
414 WARN_ON(!radix_tree_delete(&wb->bdi->cgwb_tree, wb->memcg_css->id)); in cgwb_kill()
415 list_del(&wb->memcg_node); in cgwb_kill()
416 list_del(&wb->blkcg_node); in cgwb_kill()
417 percpu_ref_kill(&wb->refcnt); in cgwb_kill()
420 static void cgwb_remove_from_bdi_list(struct bdi_writeback *wb) in cgwb_remove_from_bdi_list() argument
423 list_del_rcu(&wb->bdi_node); in cgwb_remove_from_bdi_list()
434 struct bdi_writeback *wb; in cgwb_create() local
446 wb = radix_tree_lookup(&bdi->cgwb_tree, memcg_css->id); in cgwb_create()
447 if (wb && wb->blkcg_css != blkcg_css) { in cgwb_create()
448 cgwb_kill(wb); in cgwb_create()
449 wb = NULL; in cgwb_create()
452 if (wb) in cgwb_create()
456 wb = kmalloc(sizeof(*wb), gfp); in cgwb_create()
457 if (!wb) { in cgwb_create()
462 ret = wb_init(wb, bdi, gfp); in cgwb_create()
466 ret = percpu_ref_init(&wb->refcnt, cgwb_release, 0, gfp); in cgwb_create()
470 ret = fprop_local_init_percpu(&wb->memcg_completions, gfp); in cgwb_create()
474 wb->memcg_css = memcg_css; in cgwb_create()
475 wb->blkcg_css = blkcg_css; in cgwb_create()
476 INIT_WORK(&wb->release_work, cgwb_release_workfn); in cgwb_create()
477 set_bit(WB_registered, &wb->state); in cgwb_create()
480 * The root wb determines the registered state of the whole bdi and in cgwb_create()
482 * whether they're still online. Don't link @wb if any is dead. in cgwb_create()
487 if (test_bit(WB_registered, &bdi->wb.state) && in cgwb_create()
490 ret = radix_tree_insert(&bdi->cgwb_tree, memcg_css->id, wb); in cgwb_create()
492 list_add_tail_rcu(&wb->bdi_node, &bdi->wb_list); in cgwb_create()
493 list_add(&wb->memcg_node, memcg_cgwb_list); in cgwb_create()
494 list_add(&wb->blkcg_node, blkcg_cgwb_list); in cgwb_create()
509 fprop_local_destroy_percpu(&wb->memcg_completions); in cgwb_create()
511 percpu_ref_exit(&wb->refcnt); in cgwb_create()
513 wb_exit(wb); in cgwb_create()
515 kfree(wb); in cgwb_create()
522 * wb_get_lookup - get wb for a given memcg
526 * Try to get the wb for @memcg_css on @bdi. The returned wb has its
533 * A wb is keyed by its associated memcg. As blkcg implicitly enables
539 * and disabled closer to root in the hierarchy, each wb keeps track of
541 * each lookup. On mismatch, the existing wb is discarded and a new one is
547 struct bdi_writeback *wb; in wb_get_lookup() local
550 return &bdi->wb; in wb_get_lookup()
553 wb = radix_tree_lookup(&bdi->cgwb_tree, memcg_css->id); in wb_get_lookup()
554 if (wb) { in wb_get_lookup()
559 if (unlikely(wb->blkcg_css != blkcg_css || !wb_tryget(wb))) in wb_get_lookup()
560 wb = NULL; in wb_get_lookup()
565 return wb; in wb_get_lookup()
569 * wb_get_create - get wb for a given memcg, create if necessary
574 * Try to get the wb for @memcg_css on @bdi. If it doesn't exist, try to
581 struct bdi_writeback *wb; in wb_get_create() local
586 return &bdi->wb; in wb_get_create()
589 wb = wb_get_lookup(bdi, memcg_css); in wb_get_create()
590 } while (!wb && !cgwb_create(bdi, memcg_css, gfp)); in wb_get_create()
592 return wb; in wb_get_create()
603 ret = wb_init(&bdi->wb, bdi, GFP_KERNEL); in cgwb_bdi_init()
605 bdi->wb.memcg_css = &root_mem_cgroup->css; in cgwb_bdi_init()
606 bdi->wb.blkcg_css = blkcg_root_css; in cgwb_bdi_init()
615 struct bdi_writeback *wb; in cgwb_bdi_unregister() local
617 WARN_ON(test_bit(WB_registered, &bdi->wb.state)); in cgwb_bdi_unregister()
627 wb = list_first_entry(&bdi->wb_list, struct bdi_writeback, in cgwb_bdi_unregister()
630 wb_shutdown(wb); in cgwb_bdi_unregister()
638 * wb_memcg_offline - kill all wb's associated with a memcg being offlined
641 * Also prevents creation of any new wb's associated with @memcg.
646 struct bdi_writeback *wb, *next; in wb_memcg_offline() local
649 list_for_each_entry_safe(wb, next, memcg_cgwb_list, memcg_node) in wb_memcg_offline()
650 cgwb_kill(wb); in wb_memcg_offline()
651 memcg_cgwb_list->next = NULL; /* prevent new wb's */ in wb_memcg_offline()
656 * wb_blkcg_offline - kill all wb's associated with a blkcg being offlined
659 * Also prevents creation of any new wb's associated with @blkcg.
663 struct bdi_writeback *wb, *next; in wb_blkcg_offline() local
666 list_for_each_entry_safe(wb, next, &blkcg->cgwb_list, blkcg_node) in wb_blkcg_offline()
667 cgwb_kill(wb); in wb_blkcg_offline()
668 blkcg->cgwb_list.next = NULL; /* prevent new wb's */ in wb_blkcg_offline()
675 list_add_tail_rcu(&bdi->wb.bdi_node, &bdi->wb_list); in cgwb_bdi_register()
698 return wb_init(&bdi->wb, bdi, GFP_KERNEL); in cgwb_bdi_init()
705 list_add_tail_rcu(&bdi->wb.bdi_node, &bdi->wb_list); in cgwb_bdi_register()
708 static void cgwb_remove_from_bdi_list(struct bdi_writeback *wb) in cgwb_remove_from_bdi_list() argument
710 list_del_rcu(&wb->bdi_node); in cgwb_remove_from_bdi_list()
818 set_bit(WB_registered, &bdi->wb.state); in bdi_register_va()
872 wb_shutdown(&bdi->wb); in bdi_unregister()
892 if (test_bit(WB_registered, &bdi->wb.state)) in release_bdi()
895 wb_exit(&bdi->wb); in release_bdi()
925 if (test_and_clear_bit(bit, &bdi->wb.congested)) in clear_bdi_congested()
938 if (!test_and_set_bit(bit, &bdi->wb.congested)) in set_bdi_congested()