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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c 
 kernel/drivers/lightnvm/pblk-rl.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0
12 /*
23  * Copyright (C) 2016 CNEX Labs
34  * Initial release: Javier Gonzalez <javier@cnexlabs.com>
....@@ -127,7 +128,7 @@
127128 	} else if (free_blocks < rl->high) {
128129 		int shift = rl->high_pw - rl->rb_windows_pw;
129130 		int user_windows = free_blocks >> shift;
130
-		int user_max = user_windows << PBLK_MAX_REQ_ADDRS_PW;
131
+		int user_max = user_windows << ilog2(NVM_MAX_VLBA);
131132 
132133 		rl->rb_user_max = user_max;
133134 		rl->rb_gc_max = max - user_max;
....@@ -206,16 +207,14 @@
206207 	del_timer(&rl->u_timer);
207208 }
208209 
209
-void pblk_rl_init(struct pblk_rl *rl, int budget)
210
+void pblk_rl_init(struct pblk_rl *rl, int budget, int threshold)
210211 {
211212 	struct pblk *pblk = container_of(rl, struct pblk, rl);
212213 	struct nvm_tgt_dev *dev = pblk->dev;
213214 	struct nvm_geo *geo = &dev->geo;
214215 	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
215216 	struct pblk_line_meta *lm = &pblk->lm;
216
-	int min_blocks = lm->blk_per_line * PBLK_GC_RSV_LINE;
217217 	int sec_meta, blk_meta;
218
-
219218 	unsigned int rb_windows;
220219 
221220 	/* Consider sectors used for metadata */
....@@ -225,19 +224,24 @@
225224 	rl->high = pblk->op_blks - blk_meta - lm->blk_per_line;
226225 	rl->high_pw = get_count_order(rl->high);
227226 
228
-	rl->rsv_blocks = min_blocks;
227
+	rl->rsv_blocks = pblk_get_min_chks(pblk);
229228 
230229 	/* This will always be a power-of-2 */
231
-	rb_windows = budget / PBLK_MAX_REQ_ADDRS;
230
+	rb_windows = budget / NVM_MAX_VLBA;
232231 	rl->rb_windows_pw = get_count_order(rb_windows);
233232 
234233 	/* To start with, all buffer is available to user I/O writers */
235234 	rl->rb_budget = budget;
236235 	rl->rb_user_max = budget;
237
-	rl->rb_max_io = budget >> 1;
238236 	rl->rb_gc_max = 0;
239237 	rl->rb_state = PBLK_RL_HIGH;
240238 
239
+	/* Maximize I/O size and ansure that back threshold is respected */
240
+	if (threshold)
241
+		rl->rb_max_io = budget - pblk->min_write_pgs_data - threshold;
242
+	else
243
+		rl->rb_max_io = budget - pblk->min_write_pgs_data - 1;
244
+
241245 	atomic_set(&rl->rb_user_cnt, 0);
242246 	atomic_set(&rl->rb_gc_cnt, 0);
243247 	atomic_set(&rl->rb_space, -1);