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 <[email protected]> Reviewed-by: Sandeep Dhavale <[email protected]> Link: https://lore.kernel.org/r/[email protected]
sekaiacg · Aug 8, 2024 · 10c1590 · 10c1590
1 parent aa77424
commit 10c1590
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/lib/compress.c b/lib/compress.c
@@ -1763,15 +1763,16 @@ 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)
 			erofs_warn("multi-threaded fragments is NOT implemented for now");
 		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,