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authorLinus Torvalds <torvalds@linux-foundation.org>2022-12-13 04:28:58 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-12-13 04:28:58 +0300
commit8702f2c611bf124c48b21b5c57bfc156cd11f4ca (patch)
tree00ea3dbf1acfd58d01fceebca41e11a6f9a6a943 /fs/squashfs/Kconfig
parenta7cacfb0688e3988660e90fad7017cc9a18ab390 (diff)
parent12b677f2c697d61e5ddbcb6c1650050a39392f54 (diff)
downloadlinux-8702f2c611bf124c48b21b5c57bfc156cd11f4ca.tar.xz
Merge tag 'mm-nonmm-stable-2022-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton: - A ptrace API cleanup series from Sergey Shtylyov - Fixes and cleanups for kexec from ye xingchen - nilfs2 updates from Ryusuke Konishi - squashfs feature work from Xiaoming Ni: permit configuration of the filesystem's compression concurrency from the mount command line - A series from Akinobu Mita which addresses bound checking errors when writing to debugfs files - A series from Yang Yingliang to address rapidio memory leaks - A series from Zheng Yejian to address possible overflow errors in encode_comp_t() - And a whole shower of singleton patches all over the place * tag 'mm-nonmm-stable-2022-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (79 commits) ipc: fix memory leak in init_mqueue_fs() hfsplus: fix bug causing custom uid and gid being unable to be assigned with mount rapidio: devices: fix missing put_device in mport_cdev_open kcov: fix spelling typos in comments hfs: Fix OOB Write in hfs_asc2mac hfs: fix OOB Read in __hfs_brec_find relay: fix type mismatch when allocating memory in relay_create_buf() ocfs2: always read both high and low parts of dinode link count io-mapping: move some code within the include guarded section kernel: kcsan: kcsan_test: build without structleak plugin mailmap: update email for Iskren Chernev eventfd: change int to __u64 in eventfd_signal() ifndef CONFIG_EVENTFD rapidio: fix possible UAF when kfifo_alloc() fails relay: use strscpy() is more robust and safer cpumask: limit visibility of FORCE_NR_CPUS acct: fix potential integer overflow in encode_comp_t() acct: fix accuracy loss for input value of encode_comp_t() linux/init.h: include <linux/build_bug.h> and <linux/stringify.h> rapidio: rio: fix possible name leak in rio_register_mport() rapidio: fix possible name leaks when rio_add_device() fails ...
Diffstat (limited to 'fs/squashfs/Kconfig')
-rw-r--r--fs/squashfs/Kconfig51
1 files changed, 46 insertions, 5 deletions
diff --git a/fs/squashfs/Kconfig b/fs/squashfs/Kconfig
index 916e78fabcaa..60fc98bdf421 100644
--- a/fs/squashfs/Kconfig
+++ b/fs/squashfs/Kconfig
@@ -54,9 +54,35 @@ config SQUASHFS_FILE_DIRECT
endchoice
+config SQUASHFS_DECOMP_SINGLE
+ depends on SQUASHFS
+ def_bool n
+
+config SQUASHFS_DECOMP_MULTI
+ depends on SQUASHFS
+ def_bool n
+
+config SQUASHFS_DECOMP_MULTI_PERCPU
+ depends on SQUASHFS
+ def_bool n
+
+config SQUASHFS_CHOICE_DECOMP_BY_MOUNT
+ bool "Select the parallel decompression mode during mount"
+ depends on SQUASHFS
+ default n
+ select SQUASHFS_DECOMP_SINGLE
+ select SQUASHFS_DECOMP_MULTI
+ select SQUASHFS_DECOMP_MULTI_PERCPU
+ select SQUASHFS_MOUNT_DECOMP_THREADS
+ help
+ Compile all parallel decompression modes and specify the
+ decompression mode by setting "threads=" during mount.
+ default Decompressor parallelisation is SQUASHFS_DECOMP_SINGLE
+
choice
- prompt "Decompressor parallelisation options"
+ prompt "Select decompression parallel mode at compile time"
depends on SQUASHFS
+ depends on !SQUASHFS_CHOICE_DECOMP_BY_MOUNT
help
Squashfs now supports three parallelisation options for
decompression. Each one exhibits various trade-offs between
@@ -64,15 +90,17 @@ choice
If in doubt, select "Single threaded compression"
-config SQUASHFS_DECOMP_SINGLE
+config SQUASHFS_COMPILE_DECOMP_SINGLE
bool "Single threaded compression"
+ select SQUASHFS_DECOMP_SINGLE
help
Traditionally Squashfs has used single-threaded decompression.
Only one block (data or metadata) can be decompressed at any
one time. This limits CPU and memory usage to a minimum.
-config SQUASHFS_DECOMP_MULTI
+config SQUASHFS_COMPILE_DECOMP_MULTI
bool "Use multiple decompressors for parallel I/O"
+ select SQUASHFS_DECOMP_MULTI
help
By default Squashfs uses a single decompressor but it gives
poor performance on parallel I/O workloads when using multiple CPU
@@ -85,8 +113,9 @@ config SQUASHFS_DECOMP_MULTI
decompressors per core. It dynamically allocates decompressors
on a demand basis.
-config SQUASHFS_DECOMP_MULTI_PERCPU
+config SQUASHFS_COMPILE_DECOMP_MULTI_PERCPU
bool "Use percpu multiple decompressors for parallel I/O"
+ select SQUASHFS_DECOMP_MULTI_PERCPU
help
By default Squashfs uses a single decompressor but it gives
poor performance on parallel I/O workloads when using multiple CPU
@@ -95,9 +124,21 @@ config SQUASHFS_DECOMP_MULTI_PERCPU
This decompressor implementation uses a maximum of one
decompressor per core. It uses percpu variables to ensure
decompression is load-balanced across the cores.
-
endchoice
+config SQUASHFS_MOUNT_DECOMP_THREADS
+ bool "Add the mount parameter 'threads=' for squashfs"
+ depends on SQUASHFS
+ depends on SQUASHFS_DECOMP_MULTI
+ default n
+ help
+ Use threads= to set the decompression parallel mode and the number of threads.
+ If SQUASHFS_CHOICE_DECOMP_BY_MOUNT=y
+ threads=<single|multi|percpu|1|2|3|...>
+ else
+ threads=<2|3|...>
+ The upper limit is num_online_cpus() * 2.
+
config SQUASHFS_XATTR
bool "Squashfs XATTR support"
depends on SQUASHFS