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| author | Gao Xiang <hsiangkao@redhat.com> | 2021-04-10 03:06:30 +0800 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@redhat.com> | 2021-04-10 03:19:59 +0800 |
| commit | 524887347fcb67faa0a63dd3c4c02ab48d4968d4 (patch) | |
| tree | 2a11ca8b2e7c11e74b6f4d1cfb39d2a0c182d7a9 /fs/erofs/super.c | |
| parent | 54e0b6c873dcbd02b9b479c893f6fba8fcbc6a9c (diff) | |
| download | linux-stable-524887347fcb67faa0a63dd3c4c02ab48d4968d4.tar.gz linux-stable-524887347fcb67faa0a63dd3c4c02ab48d4968d4.tar.bz2 linux-stable-524887347fcb67faa0a63dd3c4c02ab48d4968d4.zip | |
erofs: introduce multipage per-CPU buffers
To deal the with the cases which inplace decompression is infeasible
for some inplace I/O. Per-CPU buffers was introduced to get rid of page
allocation latency and thrash for low-latency decompression algorithms
such as lz4.
For the big pcluster feature, introduce multipage per-CPU buffers to
keep such inplace I/O pclusters temporarily as well but note that
per-CPU pages are just consecutive virtually.
When a new big pcluster fs is mounted, its max pclustersize will be
read and per-CPU buffers can be growed if needed. Shrinking adjustable
per-CPU buffers is more complex (because we don't know if such size
is still be used), so currently just release them all when unloading.
Link: https://lore.kernel.org/r/20210409190630.19569-1-xiang@kernel.org
Acked-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
Diffstat (limited to 'fs/erofs/super.c')
| -rw-r--r-- | fs/erofs/super.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/erofs/super.c b/fs/erofs/super.c index b641658e772f..bbf3bbd908e0 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -655,6 +655,7 @@ static int __init erofs_module_init(void) if (err) goto shrinker_err; + erofs_pcpubuf_init(); err = z_erofs_init_zip_subsystem(); if (err) goto zip_err; @@ -684,6 +685,7 @@ static void __exit erofs_module_exit(void) /* Ensure all RCU free inodes are safe before cache is destroyed. */ rcu_barrier(); kmem_cache_destroy(erofs_inode_cachep); + erofs_pcpubuf_exit(); } /* get filesystem statistics */ |