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| author | Xiaoming Ni <nixiaoming@huawei.com> | 2022-10-19 06:09:29 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-11-19 00:55:08 +0300 |
| commit | 80f784098ff44e086f68f0e8c98b6c6da8702ec4 (patch) | |
| tree | ebc40972366631d083b3d84a7f38a22d1953b3ac /fs/squashfs/decompressor_multi.c | |
| parent | 4197530bf167d5f15e68c4e4e982368c3d0a0112 (diff) | |
| download | linux-80f784098ff44e086f68f0e8c98b6c6da8702ec4.tar.xz | |
squashfs: add the mount parameter theads=<single|multi|percpu>
Patch series 'squashfs: Add the mount parameter "threads="'.
Currently, Squashfs supports multiple decompressor parallel modes.
However, this mode can be configured only during kernel building and does
not support flexible selection during runtime.
In the current patch set, the mount parameter "threads=" is added to allow
users to select the parallel decompressor mode and configure the number of
decompressors when mounting a file system.
"threads=<single|multi|percpu|1|2|3|...>"
The upper limit is num_online_cpus() * 2.
This patch (of 2):
Squashfs supports three decompression concurrency modes:
Single-thread mode: concurrent reads are blocked and the memory
overhead is small.
Multi-thread mode/percpu mode: reduces concurrent read blocking but
increases memory overhead.
The corresponding schema must be fixed at compile time. During mounting,
the concurrent decompression mode cannot be adjusted based on file read
blocking.
The mount parameter theads=<single|multi|percpu> is added to select
the concurrent decompression mode of a single SquashFS file system
image.
Link: https://lkml.kernel.org/r/20221019030930.130456-1-nixiaoming@huawei.com
Link: https://lkml.kernel.org/r/20221019030930.130456-2-nixiaoming@huawei.com
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Reviewed-by: Phillip Lougher <phillip@squashfs.org.uk>
Cc: Jianguo Chen <chenjianguo3@huawei.com>
Cc: Jubin Zhong <zhongjubin@huawei.com>
Cc: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/squashfs/decompressor_multi.c')
| -rw-r--r-- | fs/squashfs/decompressor_multi.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/fs/squashfs/decompressor_multi.c b/fs/squashfs/decompressor_multi.c index db9f12a3ea05..eb25432bd149 100644 --- a/fs/squashfs/decompressor_multi.c +++ b/fs/squashfs/decompressor_multi.c @@ -29,12 +29,11 @@ #define MAX_DECOMPRESSOR (num_online_cpus() * 2) -int squashfs_max_decompressors(void) +static int squashfs_max_decompressors(void) { return MAX_DECOMPRESSOR; } - struct squashfs_stream { void *comp_opts; struct list_head strm_list; @@ -59,7 +58,7 @@ static void put_decomp_stream(struct decomp_stream *decomp_strm, wake_up(&stream->wait); } -void *squashfs_decompressor_create(struct squashfs_sb_info *msblk, +static void *squashfs_decompressor_create(struct squashfs_sb_info *msblk, void *comp_opts) { struct squashfs_stream *stream; @@ -103,7 +102,7 @@ out: } -void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk) +static void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk) { struct squashfs_stream *stream = msblk->stream; if (stream) { @@ -180,7 +179,7 @@ wait: } -int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio, +static int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio, int offset, int length, struct squashfs_page_actor *output) { @@ -195,3 +194,10 @@ int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio, msblk->decompressor->name); return res; } + +const struct squashfs_decompressor_thread_ops squashfs_decompressor_multi = { + .create = squashfs_decompressor_create, + .destroy = squashfs_decompressor_destroy, + .decompress = squashfs_decompress, + .max_decompressors = squashfs_max_decompressors, +}; |