From c4d39c4d5f66d5c96131737f7905c96c258d82ba Mon Sep 17 00:00:00 2001 From: Rui Salvaterra Date: Mon, 5 Apr 2021 16:45:47 +0100 Subject: [PATCH] kernel: default to zstd compression in ubifs Compared to both lzo and zlib, zstd is the best all-around performer. Backport a kernel patch [1] (to both 5.4 and 5.10), in order to set it as default for ubifs, if available. [1] https://lore.kernel.org/linux-mtd/CAFLxGvwhtRY-6kT-sN=AgjvyssHb5qdTS6WQHkhKu3YrPuTkdw@mail.gmail.com/ Signed-off-by: Rui Salvaterra --- ...13-ubifs-default-to-zstd-compression.patch | 25 +++++++++++++++++++ ...13-ubifs-default-to-zstd-compression.patch | 25 +++++++++++++++++++ 2 files changed, 50 insertions(+) create mode 100644 target/linux/generic/backport-5.10/500-v5.13-ubifs-default-to-zstd-compression.patch create mode 100644 target/linux/generic/backport-5.4/500-v5.13-ubifs-default-to-zstd-compression.patch diff --git a/target/linux/generic/backport-5.10/500-v5.13-ubifs-default-to-zstd-compression.patch b/target/linux/generic/backport-5.10/500-v5.13-ubifs-default-to-zstd-compression.patch new file mode 100644 index 0000000000..dd50c19c27 --- /dev/null +++ b/target/linux/generic/backport-5.10/500-v5.13-ubifs-default-to-zstd-compression.patch @@ -0,0 +1,25 @@ +From dcdf415b740923530dc71d89fecc8361078473f5 Mon Sep 17 00:00:00 2001 +From: Rui Salvaterra +Date: Mon, 5 Apr 2021 16:11:55 +0100 +Subject: [PATCH] ubifs: default to zstd compression + +Compared to lzo and zlib, zstd is the best all-around performer, both in terms +of speed and compression ratio. Set it as the default, if available. + +Signed-off-by: Rui Salvaterra +--- + fs/ubifs/sb.c | 3 +++ + 1 file changed, 3 insertions(+) + +--- a/fs/ubifs/sb.c ++++ b/fs/ubifs/sb.c +@@ -53,6 +53,9 @@ + + static int get_default_compressor(struct ubifs_info *c) + { ++ if (ubifs_compr_present(c, UBIFS_COMPR_ZSTD)) ++ return UBIFS_COMPR_ZSTD; ++ + if (ubifs_compr_present(c, UBIFS_COMPR_LZO)) + return UBIFS_COMPR_LZO; + diff --git a/target/linux/generic/backport-5.4/500-v5.13-ubifs-default-to-zstd-compression.patch b/target/linux/generic/backport-5.4/500-v5.13-ubifs-default-to-zstd-compression.patch new file mode 100644 index 0000000000..dd50c19c27 --- /dev/null +++ b/target/linux/generic/backport-5.4/500-v5.13-ubifs-default-to-zstd-compression.patch @@ -0,0 +1,25 @@ +From dcdf415b740923530dc71d89fecc8361078473f5 Mon Sep 17 00:00:00 2001 +From: Rui Salvaterra +Date: Mon, 5 Apr 2021 16:11:55 +0100 +Subject: [PATCH] ubifs: default to zstd compression + +Compared to lzo and zlib, zstd is the best all-around performer, both in terms +of speed and compression ratio. Set it as the default, if available. + +Signed-off-by: Rui Salvaterra +--- + fs/ubifs/sb.c | 3 +++ + 1 file changed, 3 insertions(+) + +--- a/fs/ubifs/sb.c ++++ b/fs/ubifs/sb.c +@@ -53,6 +53,9 @@ + + static int get_default_compressor(struct ubifs_info *c) + { ++ if (ubifs_compr_present(c, UBIFS_COMPR_ZSTD)) ++ return UBIFS_COMPR_ZSTD; ++ + if (ubifs_compr_present(c, UBIFS_COMPR_LZO)) + return UBIFS_COMPR_LZO; + -- 2.30.2