From: Gao Xiang <hsiangkao@linux.alibaba.com>
Date: Wed, 7 Aug 2024 08:54:13 +0000 (+0800)
Subject: erofs-utils: enable multi-threaded support for `-Eall-fragments`
X-Git-Tag: v1.8~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=10c1590c0920bea7298d6fefd6154d9bb4230923;p=platform%2Fupstream%2Ferofs-utils.git

erofs-utils: enable multi-threaded support for `-Eall-fragments`

Since `-Eall-fragments` packs the whole data into the special inode,
it's possible to use the multi-threaded compression for this.

Some users may be interested in `-Eall-fragments` for extreme
compression anyway.

Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Sandeep Dhavale <dhavale@google.com>
Link: https://lore.kernel.org/r/20240807085413.717066-1-hsiangkao@linux.alibaba.com
---

diff --git a/lib/compress.c b/lib/compress.c
index cea96f4..8655e78 100644
--- a/lib/compress.c
+++ b/lib/compress.c
@@ -1763,7 +1763,8 @@ int z_erofs_compress_init(struct erofs_sb_info *sbi, struct erofs_buffer_head *s
 
 	z_erofs_mt_enabled = false;
 #ifdef EROFS_MT_ENABLED
-	if (cfg.c_mt_workers > 1 && (cfg.c_dedupe || cfg.c_fragments)) {
+	if (cfg.c_mt_workers >= 1 && (cfg.c_dedupe ||
+				      (cfg.c_fragments && !cfg.c_all_fragments))) {
 		if (cfg.c_dedupe)
 			erofs_warn("multi-threaded dedupe is NOT implemented for now");
 		if (cfg.c_fragments)
@@ -1771,7 +1772,7 @@ int z_erofs_compress_init(struct erofs_sb_info *sbi, struct erofs_buffer_head *s
 		cfg.c_mt_workers = 0;
 	}
 
-	if (cfg.c_mt_workers > 1) {
+	if (cfg.c_mt_workers >= 1) {
 		ret = erofs_alloc_workqueue(&z_erofs_mt_ctrl.wq,
 					    cfg.c_mt_workers,
 					    cfg.c_mt_workers << 2,