diff options
| 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/squashfs_fs_sb.h | |
| 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/squashfs_fs_sb.h')
| -rw-r--r-- | fs/squashfs/squashfs_fs_sb.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/squashfs/squashfs_fs_sb.h b/fs/squashfs/squashfs_fs_sb.h index 1e90c2575f9b..f1e5dad8ae0a 100644 --- a/fs/squashfs/squashfs_fs_sb.h +++ b/fs/squashfs/squashfs_fs_sb.h @@ -53,7 +53,7 @@ struct squashfs_sb_info { __le64 *xattr_id_table; struct mutex meta_index_mutex; struct meta_index *meta_index; - struct squashfs_stream *stream; + void *stream; __le64 *inode_lookup_table; u64 inode_table; u64 directory_table; @@ -66,5 +66,6 @@ struct squashfs_sb_info { int xattr_ids; unsigned int ids; bool panic_on_errors; + const struct squashfs_decompressor_thread_ops *thread_ops; }; #endif |