[PATCH RFC v3 3/4] zram: backend_zstd: Adjust estimated_src_size to accommodate multi-page compression

[Barry Song <21cnbao@gmail.com>]

From: Barry Song <v-songbaohua@oppo.com>

If we continue using PAGE_SIZE as the estimated_src_size, we won't
benefit from the reduced CPU usage and improved compression ratio
brought by larger block compression.

Signed-off-by: Barry Song <v-songbaohua@oppo.com>
---
 drivers/block/zram/backend_zstd.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/block/zram/backend_zstd.c b/drivers/block/zram/backend_zstd.c
index 1184c0036f44..e126615eeff2 100644
--- a/drivers/block/zram/backend_zstd.c
+++ b/drivers/block/zram/backend_zstd.c
@@ -70,12 +70,12 @@ static int zstd_setup_params(struct zcomp_params *params)
 	if (params->level == ZCOMP_PARAM_NO_LEVEL)
 		params->level = zstd_default_clevel();
 
-	zp->cprm = zstd_get_params(params->level, PAGE_SIZE);
+	zp->cprm = zstd_get_params(params->level, ZCOMP_MULTI_PAGES_SIZE);
 
 	zp->custom_mem.customAlloc = zstd_custom_alloc;
 	zp->custom_mem.customFree = zstd_custom_free;
 
-	prm = zstd_get_cparams(params->level, PAGE_SIZE,
+	prm = zstd_get_cparams(params->level, ZCOMP_MULTI_PAGES_SIZE,
 			       params->dict_sz);
 
 	zp->cdict = zstd_create_cdict_byreference(params->dict,
@@ -137,7 +137,7 @@ static int zstd_create(struct zcomp_params *params, struct zcomp_ctx *ctx)
 
 	ctx->context = zctx;
 	if (params->dict_sz == 0) {
-		prm = zstd_get_params(params->level, PAGE_SIZE);
+		prm = zstd_get_params(params->level, ZCOMP_MULTI_PAGES_SIZE);
 		sz = zstd_cctx_workspace_bound(&prm.cParams);
 		zctx->cctx_mem = vzalloc(sz);
 		if (!zctx->cctx_mem)
-- 
2.39.3 (Apple Git-146)