Commit 2a206a07 authored by Djordje Nedic's avatar Djordje Nedic Committed by Benjamin Cabé
Browse files

fs: littlefs: Improve block device cache size 

Instead of picking a set of safe block multiple sized values for caches,
round down to the nearest block multiple, increasing static buffer usage
determined by Kconfig variables.

Signed-off-by: default avatarDjordje Nedic <nedic.djordje2@gmail.com>
parent fb53ea02

subsys/fs/littlefs_fs.c

+3 −5
Changes for subsys/fs/littlefs_fs.c: 3 added lines, 5 removed lines.
Original line number Diff line number Diff line
@@ -844,7 +844,6 @@ static int littlefs_init_cfg(struct fs_littlefs *fs, int flags) 
	lcp->context = fs->backend;

	/* Set the validated/defaulted values. */

	if (littlefs_on_blkdev(flags)) {

		lfs_size_t new_cache_size = block_size;

		lfs_size_t new_lookahead_size = block_size * 4;



		lcp->read = lfs_api_read_blk;
@@ -854,12 +853,11 @@ static int littlefs_init_cfg(struct fs_littlefs *fs, int flags) 
		lcp->read_size = block_size;

		lcp->prog_size = block_size;



		if (cache_size < new_cache_size) {

		if (cache_size < block_size) {

			LOG_ERR("Configured cache size is too small: %d < %d", cache_size,

				new_cache_size);

			return -ENOMEM;

				block_size);

		}

		lcp->cache_size = new_cache_size;

		lcp->cache_size = ROUND_DOWN(cache_size, block_size);



		if (lookahead_size < new_lookahead_size) {

			LOG_ERR("Configured lookahead size is too small: %d < %d",

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