Lines Matching full:pa
241 * blocks: how many blocks marked used/free in on-disk bitmap, buddy and PA.
245 * - new PA: buddy += N; PA = N
246 * - use inode PA: on-disk += N; PA -= N
247 * - discard inode PA buddy -= on-disk - PA; PA = 0
248 * - use locality group PA on-disk += N; PA -= N
249 * - discard locality group PA buddy -= PA; PA = 0
250 * note: 'buddy -= on-disk - PA' is used to show that on-disk bitmap
252 * bits from PA, only from on-disk bitmap
262 * bit set and PA claims same block, it's OK. IOW, one can set bit in
263 * on-disk bitmap if buddy has same bit set or/and PA covers corresponded
268 * - new PA
269 * blocks for PA are allocated in the buddy, buddy must be referenced
270 * until PA is linked to allocation group to avoid concurrent buddy init
271 * - use inode PA
272 * we need to make sure that either on-disk bitmap or PA has uptodate data
273 * given (3) we care that PA-=N operation doesn't interfere with init
274 * - discard inode PA
276 * - use locality group PA
277 * again PA-=N must be serialized with init
278 * - discard locality group PA
280 * - new PA vs.
281 * - use inode PA
283 * - discard inode PA
284 * discard process must wait until PA isn't used by another process
285 * - use locality group PA
287 * - discard locality group PA
288 * discard process must wait until PA isn't used by another process
289 * - use inode PA
290 * - use inode PA
292 * - discard inode PA
293 * discard process must wait until PA isn't used by another process
294 * - use locality group PA
296 * - discard locality group PA
297 * discard process must wait until PA isn't used by another process
300 * - PA is referenced and while it is no discard is possible
301 * - PA is referenced until block isn't marked in on-disk bitmap
302 * - PA changes only after on-disk bitmap
307 * a special case when we've used PA to emptiness. no need to modify buddy
322 * find proper PA (per-inode or group)
326 * release PA
338 * remove PA from object (inode or locality group)
350 * - per-pa lock (pa)
355 * - new pa
359 * - find and use pa:
360 * pa
362 * - release consumed pa:
363 * pa
369 * pa
373 * pa
378 * pa
750 struct ext4_prealloc_space *pa; in __mb_check_buddy() local
751 pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list); in __mb_check_buddy()
752 ext4_get_group_no_and_offset(sb, pa->pa_pstart, &groupnr, &k); in __mb_check_buddy()
754 for (i = 0; i < pa->pa_len; i++) in __mb_check_buddy()
3528 struct ext4_prealloc_space *pa; in ext4_mb_cleanup_pa() local
3533 pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list); in ext4_mb_cleanup_pa()
3534 list_del(&pa->pa_group_list); in ext4_mb_cleanup_pa()
3536 kmem_cache_free(ext4_pspace_cachep, pa); in ext4_mb_cleanup_pa()
4001 struct ext4_prealloc_space *pa; in ext4_mb_normalize_request() local
4095 list_for_each_entry_rcu(pa, &ei->i_prealloc_list, pa_inode_list) { in ext4_mb_normalize_request()
4098 if (pa->pa_deleted) in ext4_mb_normalize_request()
4100 spin_lock(&pa->pa_lock); in ext4_mb_normalize_request()
4101 if (pa->pa_deleted) { in ext4_mb_normalize_request()
4102 spin_unlock(&pa->pa_lock); in ext4_mb_normalize_request()
4106 pa_end = pa->pa_lstart + EXT4_C2B(EXT4_SB(ac->ac_sb), in ext4_mb_normalize_request()
4107 pa->pa_len); in ext4_mb_normalize_request()
4109 /* PA must not overlap original request */ in ext4_mb_normalize_request()
4111 ac->ac_o_ex.fe_logical < pa->pa_lstart)); in ext4_mb_normalize_request()
4114 if (pa->pa_lstart >= end || pa_end <= start) { in ext4_mb_normalize_request()
4115 spin_unlock(&pa->pa_lock); in ext4_mb_normalize_request()
4118 BUG_ON(pa->pa_lstart <= start && pa_end >= end); in ext4_mb_normalize_request()
4120 /* adjust start or end to be adjacent to this pa */ in ext4_mb_normalize_request()
4124 } else if (pa->pa_lstart > ac->ac_o_ex.fe_logical) { in ext4_mb_normalize_request()
4125 BUG_ON(pa->pa_lstart > end); in ext4_mb_normalize_request()
4126 end = pa->pa_lstart; in ext4_mb_normalize_request()
4128 spin_unlock(&pa->pa_lock); in ext4_mb_normalize_request()
4135 list_for_each_entry_rcu(pa, &ei->i_prealloc_list, pa_inode_list) { in ext4_mb_normalize_request()
4138 spin_lock(&pa->pa_lock); in ext4_mb_normalize_request()
4139 if (pa->pa_deleted == 0) { in ext4_mb_normalize_request()
4140 pa_end = pa->pa_lstart + EXT4_C2B(EXT4_SB(ac->ac_sb), in ext4_mb_normalize_request()
4141 pa->pa_len); in ext4_mb_normalize_request()
4142 BUG_ON(!(start >= pa_end || end <= pa->pa_lstart)); in ext4_mb_normalize_request()
4144 spin_unlock(&pa->pa_lock); in ext4_mb_normalize_request()
4210 * Called on failure; free up any blocks from the inode PA for this
4217 struct ext4_prealloc_space *pa = ac->ac_pa; in ext4_discard_allocated_blocks() local
4221 if (pa == NULL) { in ext4_discard_allocated_blocks()
4241 if (pa->pa_type == MB_INODE_PA) in ext4_discard_allocated_blocks()
4242 pa->pa_free += ac->ac_b_ex.fe_len; in ext4_discard_allocated_blocks()
4249 struct ext4_prealloc_space *pa) in ext4_mb_use_inode_pa() argument
4257 start = pa->pa_pstart + (ac->ac_o_ex.fe_logical - pa->pa_lstart); in ext4_mb_use_inode_pa()
4258 end = min(pa->pa_pstart + EXT4_C2B(sbi, pa->pa_len), in ext4_mb_use_inode_pa()
4265 ac->ac_pa = pa; in ext4_mb_use_inode_pa()
4267 BUG_ON(start < pa->pa_pstart); in ext4_mb_use_inode_pa()
4268 BUG_ON(end > pa->pa_pstart + EXT4_C2B(sbi, pa->pa_len)); in ext4_mb_use_inode_pa()
4269 BUG_ON(pa->pa_free < len); in ext4_mb_use_inode_pa()
4270 pa->pa_free -= len; in ext4_mb_use_inode_pa()
4272 mb_debug(ac->ac_sb, "use %llu/%d from inode pa %p\n", start, len, pa); in ext4_mb_use_inode_pa()
4279 struct ext4_prealloc_space *pa) in ext4_mb_use_group_pa() argument
4283 ext4_get_group_no_and_offset(ac->ac_sb, pa->pa_pstart, in ext4_mb_use_group_pa()
4288 ac->ac_pa = pa; in ext4_mb_use_group_pa()
4292 * instead we correct pa later, after blocks are marked in ext4_mb_use_group_pa()
4294 * Other CPUs are prevented from allocating from this pa by lg_mutex in ext4_mb_use_group_pa()
4296 mb_debug(ac->ac_sb, "use %u/%u from group pa %p\n", in ext4_mb_use_group_pa()
4297 pa->pa_lstart-len, len, pa); in ext4_mb_use_group_pa()
4308 struct ext4_prealloc_space *pa, in ext4_mb_check_group_pa() argument
4314 atomic_inc(&pa->pa_count); in ext4_mb_check_group_pa()
4315 return pa; in ext4_mb_check_group_pa()
4318 new_distance = abs(goal_block - pa->pa_pstart); in ext4_mb_check_group_pa()
4325 atomic_inc(&pa->pa_count); in ext4_mb_check_group_pa()
4326 return pa; in ext4_mb_check_group_pa()
4339 struct ext4_prealloc_space *pa, *cpa = NULL; in ext4_mb_use_preallocated() local
4348 list_for_each_entry_rcu(pa, &ei->i_prealloc_list, pa_inode_list) { in ext4_mb_use_preallocated()
4352 if (ac->ac_o_ex.fe_logical < pa->pa_lstart || in ext4_mb_use_preallocated()
4353 ac->ac_o_ex.fe_logical >= (pa->pa_lstart + in ext4_mb_use_preallocated()
4354 EXT4_C2B(sbi, pa->pa_len))) in ext4_mb_use_preallocated()
4359 (pa->pa_pstart + EXT4_C2B(sbi, pa->pa_len) > in ext4_mb_use_preallocated()
4364 spin_lock(&pa->pa_lock); in ext4_mb_use_preallocated()
4365 if (pa->pa_deleted == 0 && pa->pa_free) { in ext4_mb_use_preallocated()
4366 atomic_inc(&pa->pa_count); in ext4_mb_use_preallocated()
4367 ext4_mb_use_inode_pa(ac, pa); in ext4_mb_use_preallocated()
4368 spin_unlock(&pa->pa_lock); in ext4_mb_use_preallocated()
4373 spin_unlock(&pa->pa_lock); in ext4_mb_use_preallocated()
4397 list_for_each_entry_rcu(pa, &lg->lg_prealloc_list[i], in ext4_mb_use_preallocated()
4399 spin_lock(&pa->pa_lock); in ext4_mb_use_preallocated()
4400 if (pa->pa_deleted == 0 && in ext4_mb_use_preallocated()
4401 pa->pa_free >= ac->ac_o_ex.fe_len) { in ext4_mb_use_preallocated()
4404 pa, cpa); in ext4_mb_use_preallocated()
4406 spin_unlock(&pa->pa_lock); in ext4_mb_use_preallocated()
4452 struct ext4_prealloc_space *pa; in ext4_mb_generate_from_pa() local
4468 pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list); in ext4_mb_generate_from_pa()
4469 spin_lock(&pa->pa_lock); in ext4_mb_generate_from_pa()
4470 ext4_get_group_no_and_offset(sb, pa->pa_pstart, in ext4_mb_generate_from_pa()
4472 len = pa->pa_len; in ext4_mb_generate_from_pa()
4473 spin_unlock(&pa->pa_lock); in ext4_mb_generate_from_pa()
4484 struct ext4_prealloc_space *pa) in ext4_mb_mark_pa_deleted() argument
4488 if (pa->pa_deleted) { in ext4_mb_mark_pa_deleted()
4489 ext4_warning(sb, "deleted pa, type:%d, pblk:%llu, lblk:%u, len:%d\n", in ext4_mb_mark_pa_deleted()
4490 pa->pa_type, pa->pa_pstart, pa->pa_lstart, in ext4_mb_mark_pa_deleted()
4491 pa->pa_len); in ext4_mb_mark_pa_deleted()
4495 pa->pa_deleted = 1; in ext4_mb_mark_pa_deleted()
4497 if (pa->pa_type == MB_INODE_PA) { in ext4_mb_mark_pa_deleted()
4498 ei = EXT4_I(pa->pa_inode); in ext4_mb_mark_pa_deleted()
4505 struct ext4_prealloc_space *pa; in ext4_mb_pa_callback() local
4506 pa = container_of(head, struct ext4_prealloc_space, u.pa_rcu); in ext4_mb_pa_callback()
4508 BUG_ON(atomic_read(&pa->pa_count)); in ext4_mb_pa_callback()
4509 BUG_ON(pa->pa_deleted == 0); in ext4_mb_pa_callback()
4510 kmem_cache_free(ext4_pspace_cachep, pa); in ext4_mb_pa_callback()
4518 struct super_block *sb, struct ext4_prealloc_space *pa) in ext4_mb_put_pa() argument
4524 spin_lock(&pa->pa_lock); in ext4_mb_put_pa()
4525 if (!atomic_dec_and_test(&pa->pa_count) || pa->pa_free != 0) { in ext4_mb_put_pa()
4526 spin_unlock(&pa->pa_lock); in ext4_mb_put_pa()
4530 if (pa->pa_deleted == 1) { in ext4_mb_put_pa()
4531 spin_unlock(&pa->pa_lock); in ext4_mb_put_pa()
4535 ext4_mb_mark_pa_deleted(sb, pa); in ext4_mb_put_pa()
4536 spin_unlock(&pa->pa_lock); in ext4_mb_put_pa()
4538 grp_blk = pa->pa_pstart; in ext4_mb_put_pa()
4541 * next group when pa is used up in ext4_mb_put_pa()
4543 if (pa->pa_type == MB_GROUP_PA) in ext4_mb_put_pa()
4552 * find block B in PA in ext4_mb_put_pa()
4555 * drop PA from group in ext4_mb_put_pa()
4559 * we make "copy" and "mark all PAs" atomic and serialize "drop PA" in ext4_mb_put_pa()
4563 list_del(&pa->pa_group_list); in ext4_mb_put_pa()
4566 spin_lock(pa->pa_obj_lock); in ext4_mb_put_pa()
4567 list_del_rcu(&pa->pa_inode_list); in ext4_mb_put_pa()
4568 spin_unlock(pa->pa_obj_lock); in ext4_mb_put_pa()
4570 call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback); in ext4_mb_put_pa()
4581 struct ext4_prealloc_space *pa; in ext4_mb_new_inode_pa() local
4591 pa = ac->ac_pa; in ext4_mb_new_inode_pa()
4631 pa->pa_lstart = ac->ac_b_ex.fe_logical; in ext4_mb_new_inode_pa()
4632 pa->pa_pstart = ext4_grp_offs_to_block(sb, &ac->ac_b_ex); in ext4_mb_new_inode_pa()
4633 pa->pa_len = ac->ac_b_ex.fe_len; in ext4_mb_new_inode_pa()
4634 pa->pa_free = pa->pa_len; in ext4_mb_new_inode_pa()
4635 spin_lock_init(&pa->pa_lock); in ext4_mb_new_inode_pa()
4636 INIT_LIST_HEAD(&pa->pa_inode_list); in ext4_mb_new_inode_pa()
4637 INIT_LIST_HEAD(&pa->pa_group_list); in ext4_mb_new_inode_pa()
4638 pa->pa_deleted = 0; in ext4_mb_new_inode_pa()
4639 pa->pa_type = MB_INODE_PA; in ext4_mb_new_inode_pa()
4641 mb_debug(sb, "new inode pa %p: %llu/%d for %u\n", pa, pa->pa_pstart, in ext4_mb_new_inode_pa()
4642 pa->pa_len, pa->pa_lstart); in ext4_mb_new_inode_pa()
4643 trace_ext4_mb_new_inode_pa(ac, pa); in ext4_mb_new_inode_pa()
4645 ext4_mb_use_inode_pa(ac, pa); in ext4_mb_new_inode_pa()
4646 atomic_add(pa->pa_free, &sbi->s_mb_preallocated); in ext4_mb_new_inode_pa()
4651 pa->pa_obj_lock = &ei->i_prealloc_lock; in ext4_mb_new_inode_pa()
4652 pa->pa_inode = ac->ac_inode; in ext4_mb_new_inode_pa()
4654 list_add(&pa->pa_group_list, &grp->bb_prealloc_list); in ext4_mb_new_inode_pa()
4656 spin_lock(pa->pa_obj_lock); in ext4_mb_new_inode_pa()
4657 list_add_rcu(&pa->pa_inode_list, &ei->i_prealloc_list); in ext4_mb_new_inode_pa()
4658 spin_unlock(pa->pa_obj_lock); in ext4_mb_new_inode_pa()
4670 struct ext4_prealloc_space *pa; in ext4_mb_new_group_pa() local
4679 pa = ac->ac_pa; in ext4_mb_new_group_pa()
4685 pa->pa_pstart = ext4_grp_offs_to_block(sb, &ac->ac_b_ex); in ext4_mb_new_group_pa()
4686 pa->pa_lstart = pa->pa_pstart; in ext4_mb_new_group_pa()
4687 pa->pa_len = ac->ac_b_ex.fe_len; in ext4_mb_new_group_pa()
4688 pa->pa_free = pa->pa_len; in ext4_mb_new_group_pa()
4689 spin_lock_init(&pa->pa_lock); in ext4_mb_new_group_pa()
4690 INIT_LIST_HEAD(&pa->pa_inode_list); in ext4_mb_new_group_pa()
4691 INIT_LIST_HEAD(&pa->pa_group_list); in ext4_mb_new_group_pa()
4692 pa->pa_deleted = 0; in ext4_mb_new_group_pa()
4693 pa->pa_type = MB_GROUP_PA; in ext4_mb_new_group_pa()
4695 mb_debug(sb, "new group pa %p: %llu/%d for %u\n", pa, pa->pa_pstart, in ext4_mb_new_group_pa()
4696 pa->pa_len, pa->pa_lstart); in ext4_mb_new_group_pa()
4697 trace_ext4_mb_new_group_pa(ac, pa); in ext4_mb_new_group_pa()
4699 ext4_mb_use_group_pa(ac, pa); in ext4_mb_new_group_pa()
4700 atomic_add(pa->pa_free, &EXT4_SB(sb)->s_mb_preallocated); in ext4_mb_new_group_pa()
4706 pa->pa_obj_lock = &lg->lg_prealloc_lock; in ext4_mb_new_group_pa()
4707 pa->pa_inode = NULL; in ext4_mb_new_group_pa()
4709 list_add(&pa->pa_group_list, &grp->bb_prealloc_list); in ext4_mb_new_group_pa()
4712 * We will later add the new pa to the right bucket in ext4_mb_new_group_pa()
4728 * @pa must be unlinked from inode and group lists, so that
4735 struct ext4_prealloc_space *pa) in ext4_mb_release_inode_pa() argument
4746 BUG_ON(pa->pa_deleted == 0); in ext4_mb_release_inode_pa()
4747 ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit); in ext4_mb_release_inode_pa()
4748 grp_blk_start = pa->pa_pstart - EXT4_C2B(sbi, bit); in ext4_mb_release_inode_pa()
4749 BUG_ON(group != e4b->bd_group && pa->pa_len != 0); in ext4_mb_release_inode_pa()
4750 end = bit + pa->pa_len; in ext4_mb_release_inode_pa()
4763 trace_ext4_mb_release_inode_pa(pa, (grp_blk_start + in ext4_mb_release_inode_pa()
4766 mb_free_blocks(pa->pa_inode, e4b, bit, next - bit); in ext4_mb_release_inode_pa()
4769 if (free != pa->pa_free) { in ext4_mb_release_inode_pa()
4771 "pa %p: logic %lu, phys. %lu, len %d", in ext4_mb_release_inode_pa()
4772 pa, (unsigned long) pa->pa_lstart, in ext4_mb_release_inode_pa()
4773 (unsigned long) pa->pa_pstart, in ext4_mb_release_inode_pa()
4774 pa->pa_len); in ext4_mb_release_inode_pa()
4776 free, pa->pa_free); in ext4_mb_release_inode_pa()
4778 * pa is already deleted so we use the value obtained in ext4_mb_release_inode_pa()
4789 struct ext4_prealloc_space *pa) in ext4_mb_release_group_pa() argument
4795 trace_ext4_mb_release_group_pa(sb, pa); in ext4_mb_release_group_pa()
4796 BUG_ON(pa->pa_deleted == 0); in ext4_mb_release_group_pa()
4797 ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit); in ext4_mb_release_group_pa()
4798 BUG_ON(group != e4b->bd_group && pa->pa_len != 0); in ext4_mb_release_group_pa()
4799 mb_free_blocks(pa->pa_inode, e4b, bit, pa->pa_len); in ext4_mb_release_group_pa()
4800 atomic_add(pa->pa_len, &EXT4_SB(sb)->s_mb_discarded); in ext4_mb_release_group_pa()
4801 trace_ext4_mballoc_discard(sb, NULL, group, bit, pa->pa_len); in ext4_mb_release_group_pa()
4821 struct ext4_prealloc_space *pa, *tmp; in ext4_mb_discard_group_preallocations() local
4856 list_for_each_entry_safe(pa, tmp, in ext4_mb_discard_group_preallocations()
4858 spin_lock(&pa->pa_lock); in ext4_mb_discard_group_preallocations()
4859 if (atomic_read(&pa->pa_count)) { in ext4_mb_discard_group_preallocations()
4860 spin_unlock(&pa->pa_lock); in ext4_mb_discard_group_preallocations()
4864 if (pa->pa_deleted) { in ext4_mb_discard_group_preallocations()
4865 spin_unlock(&pa->pa_lock); in ext4_mb_discard_group_preallocations()
4870 ext4_mb_mark_pa_deleted(sb, pa); in ext4_mb_discard_group_preallocations()
4876 free += pa->pa_free; in ext4_mb_discard_group_preallocations()
4878 spin_unlock(&pa->pa_lock); in ext4_mb_discard_group_preallocations()
4880 list_del(&pa->pa_group_list); in ext4_mb_discard_group_preallocations()
4881 list_add(&pa->u.pa_tmp_list, &list); in ext4_mb_discard_group_preallocations()
4885 list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) { in ext4_mb_discard_group_preallocations()
4888 spin_lock(pa->pa_obj_lock); in ext4_mb_discard_group_preallocations()
4889 list_del_rcu(&pa->pa_inode_list); in ext4_mb_discard_group_preallocations()
4890 spin_unlock(pa->pa_obj_lock); in ext4_mb_discard_group_preallocations()
4892 if (pa->pa_type == MB_GROUP_PA) in ext4_mb_discard_group_preallocations()
4893 ext4_mb_release_group_pa(&e4b, pa); in ext4_mb_discard_group_preallocations()
4895 ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa); in ext4_mb_discard_group_preallocations()
4897 list_del(&pa->u.pa_tmp_list); in ext4_mb_discard_group_preallocations()
4898 call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback); in ext4_mb_discard_group_preallocations()
4933 struct ext4_prealloc_space *pa, *tmp; in ext4_discard_preallocations() local
4958 /* first, collect all pa's in the inode */ in ext4_discard_preallocations()
4961 pa = list_entry(ei->i_prealloc_list.prev, in ext4_discard_preallocations()
4963 BUG_ON(pa->pa_obj_lock != &ei->i_prealloc_lock); in ext4_discard_preallocations()
4964 spin_lock(&pa->pa_lock); in ext4_discard_preallocations()
4965 if (atomic_read(&pa->pa_count)) { in ext4_discard_preallocations()
4968 spin_unlock(&pa->pa_lock); in ext4_discard_preallocations()
4971 "uh-oh! used pa while discarding"); in ext4_discard_preallocations()
4977 if (pa->pa_deleted == 0) { in ext4_discard_preallocations()
4978 ext4_mb_mark_pa_deleted(sb, pa); in ext4_discard_preallocations()
4979 spin_unlock(&pa->pa_lock); in ext4_discard_preallocations()
4980 list_del_rcu(&pa->pa_inode_list); in ext4_discard_preallocations()
4981 list_add(&pa->u.pa_tmp_list, &list); in ext4_discard_preallocations()
4986 /* someone is deleting pa right now */ in ext4_discard_preallocations()
4987 spin_unlock(&pa->pa_lock); in ext4_discard_preallocations()
4991 * doesn't mean pa is already unlinked from in ext4_discard_preallocations()
4995 * pa from inode's list may access already in ext4_discard_preallocations()
5007 list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) { in ext4_discard_preallocations()
5008 BUG_ON(pa->pa_type != MB_INODE_PA); in ext4_discard_preallocations()
5009 group = ext4_get_group_number(sb, pa->pa_pstart); in ext4_discard_preallocations()
5029 list_del(&pa->pa_group_list); in ext4_discard_preallocations()
5030 ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa); in ext4_discard_preallocations()
5036 list_del(&pa->u.pa_tmp_list); in ext4_discard_preallocations()
5037 call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback); in ext4_discard_preallocations()
5043 struct ext4_prealloc_space *pa; in ext4_mb_pa_alloc() local
5046 pa = kmem_cache_zalloc(ext4_pspace_cachep, GFP_NOFS); in ext4_mb_pa_alloc()
5047 if (!pa) in ext4_mb_pa_alloc()
5049 atomic_set(&pa->pa_count, 1); in ext4_mb_pa_alloc()
5050 ac->ac_pa = pa; in ext4_mb_pa_alloc()
5056 struct ext4_prealloc_space *pa = ac->ac_pa; in ext4_mb_pa_free() local
5058 BUG_ON(!pa); in ext4_mb_pa_free()
5060 WARN_ON(!atomic_dec_and_test(&pa->pa_count)); in ext4_mb_pa_free()
5061 kmem_cache_free(ext4_pspace_cachep, pa); in ext4_mb_pa_free()
5076 struct ext4_prealloc_space *pa; in ext4_mb_show_pa() local
5081 pa = list_entry(cur, struct ext4_prealloc_space, in ext4_mb_show_pa()
5083 spin_lock(&pa->pa_lock); in ext4_mb_show_pa()
5084 ext4_get_group_no_and_offset(sb, pa->pa_pstart, in ext4_mb_show_pa()
5086 spin_unlock(&pa->pa_lock); in ext4_mb_show_pa()
5087 mb_debug(sb, "PA:%u:%d:%d\n", i, start, in ext4_mb_show_pa()
5088 pa->pa_len); in ext4_mb_show_pa()
5255 struct ext4_prealloc_space *pa, *tmp; in ext4_mb_discard_lg_preallocations() local
5262 list_for_each_entry_rcu(pa, &lg->lg_prealloc_list[order], in ext4_mb_discard_lg_preallocations()
5265 spin_lock(&pa->pa_lock); in ext4_mb_discard_lg_preallocations()
5266 if (atomic_read(&pa->pa_count)) { in ext4_mb_discard_lg_preallocations()
5268 * This is the pa that we just used in ext4_mb_discard_lg_preallocations()
5272 spin_unlock(&pa->pa_lock); in ext4_mb_discard_lg_preallocations()
5275 if (pa->pa_deleted) { in ext4_mb_discard_lg_preallocations()
5276 spin_unlock(&pa->pa_lock); in ext4_mb_discard_lg_preallocations()
5280 BUG_ON(pa->pa_type != MB_GROUP_PA); in ext4_mb_discard_lg_preallocations()
5283 ext4_mb_mark_pa_deleted(sb, pa); in ext4_mb_discard_lg_preallocations()
5284 spin_unlock(&pa->pa_lock); in ext4_mb_discard_lg_preallocations()
5286 list_del_rcu(&pa->pa_inode_list); in ext4_mb_discard_lg_preallocations()
5287 list_add(&pa->u.pa_tmp_list, &discard_list); in ext4_mb_discard_lg_preallocations()
5302 list_for_each_entry_safe(pa, tmp, &discard_list, u.pa_tmp_list) { in ext4_mb_discard_lg_preallocations()
5305 group = ext4_get_group_number(sb, pa->pa_pstart); in ext4_mb_discard_lg_preallocations()
5314 list_del(&pa->pa_group_list); in ext4_mb_discard_lg_preallocations()
5315 ext4_mb_release_group_pa(&e4b, pa); in ext4_mb_discard_lg_preallocations()
5319 list_del(&pa->u.pa_tmp_list); in ext4_mb_discard_lg_preallocations()
5320 call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback); in ext4_mb_discard_lg_preallocations()
5338 struct ext4_prealloc_space *tmp_pa, *pa = ac->ac_pa; in ext4_mb_add_n_trim() local
5340 order = fls(pa->pa_free) - 1; in ext4_mb_add_n_trim()
5354 if (!added && pa->pa_free < tmp_pa->pa_free) { in ext4_mb_add_n_trim()
5356 list_add_tail_rcu(&pa->pa_inode_list, in ext4_mb_add_n_trim()
5368 list_add_tail_rcu(&pa->pa_inode_list, in ext4_mb_add_n_trim()
5382 * if per-inode prealloc list is too long, trim some PA
5406 struct ext4_prealloc_space *pa = ac->ac_pa; in ext4_mb_release_context() local
5407 if (pa) { in ext4_mb_release_context()
5408 if (pa->pa_type == MB_GROUP_PA) { in ext4_mb_release_context()
5410 spin_lock(&pa->pa_lock); in ext4_mb_release_context()
5411 pa->pa_pstart += EXT4_C2B(sbi, ac->ac_b_ex.fe_len); in ext4_mb_release_context()
5412 pa->pa_lstart += EXT4_C2B(sbi, ac->ac_b_ex.fe_len); in ext4_mb_release_context()
5413 pa->pa_free -= ac->ac_b_ex.fe_len; in ext4_mb_release_context()
5414 pa->pa_len -= ac->ac_b_ex.fe_len; in ext4_mb_release_context()
5415 spin_unlock(&pa->pa_lock); in ext4_mb_release_context()
5418 * We want to add the pa to the right bucket. in ext4_mb_release_context()
5423 if (likely(pa->pa_free)) { in ext4_mb_release_context()
5424 spin_lock(pa->pa_obj_lock); in ext4_mb_release_context()
5425 list_del_rcu(&pa->pa_inode_list); in ext4_mb_release_context()
5426 spin_unlock(pa->pa_obj_lock); in ext4_mb_release_context()
5431 if (pa->pa_type == MB_INODE_PA) { in ext4_mb_release_context()
5434 * to trim the least recently used PA. in ext4_mb_release_context()
5436 spin_lock(pa->pa_obj_lock); in ext4_mb_release_context()
5437 list_move(&pa->pa_inode_list, &ei->i_prealloc_list); in ext4_mb_release_context()
5438 spin_unlock(pa->pa_obj_lock); in ext4_mb_release_context()
5441 ext4_mb_put_pa(ac, ac->ac_sb, pa); in ext4_mb_release_context()
5588 * pa allocated above is added to grp->bb_prealloc_list only in ext4_mb_new_blocks()
5592 * So we have to free this pa here itself. in ext4_mb_new_blocks()
5616 * If block allocation fails then the pa allocated above in ext4_mb_new_blocks()