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| author |   Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-07-15 23:41:58 +0800 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-07-21 22:55:15 +0800 |
| commit | e73681877d4c3a8e28c8416300c36b10d4d6e9c1 (patch) | |
| tree | 04d3544c69e7bdf00747c3b5d963a4aa7af2cafe | |
| parent | erofs: clean up `enum z_erofs_collectmode' (diff) | |
| download | linux-dev-e73681877d4c3a8e28c8416300c36b10d4d6e9c1.tar.xz linux-dev-e73681877d4c3a8e28c8416300c36b10d4d6e9c1.zip | |
erofs: get rid of `z_pagemap_global'
In order to introduce multi-reference pclusters for compressed data
deduplication, let's get rid of the global page array for now since
it needs to be re-designed then at least.
Acked-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220715154203.48093-12-hsiangkao@linux.alibaba.com
| -rw-r--r-- | fs/erofs/zdata.c | 28 | ||||
| -rw-r--r-- | fs/erofs/zdata.h | 1 |
2 files changed, 4 insertions, 25 deletions
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index d1f907f4757d..3f735ca0415e 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -291,9 +291,6 @@ struct z_erofs_decompress_frontend { .inode = __i, .owned_head = Z_EROFS_PCLUSTER_TAIL, \ .mode = Z_EROFS_PCLUSTER_FOLLOWED, .backmost = true } -static struct page *z_pagemap_global[Z_EROFS_VMAP_GLOBAL_PAGES]; -static DEFINE_MUTEX(z_pagemap_global_lock); - static void z_erofs_bind_cache(struct z_erofs_decompress_frontend *fe, enum z_erofs_cache_alloctype type, struct page **pagepool) @@ -966,26 +963,11 @@ static int z_erofs_decompress_pcluster(struct super_block *sb, mutex_lock(&pcl->lock); nr_pages = pcl->nr_pages; - if (nr_pages <= Z_EROFS_VMAP_ONSTACK_PAGES) { + if (nr_pages <= Z_EROFS_VMAP_ONSTACK_PAGES) pages = pages_onstack; - } else if (nr_pages <= Z_EROFS_VMAP_GLOBAL_PAGES && - mutex_trylock(&z_pagemap_global_lock)) { - pages = z_pagemap_global; - } else { - gfp_t gfp_flags = GFP_KERNEL; - - if (nr_pages > Z_EROFS_VMAP_GLOBAL_PAGES) - gfp_flags |= __GFP_NOFAIL; - + else pages = kvmalloc_array(nr_pages, sizeof(struct page *), - gfp_flags); - - /* fallback to global pagemap for the lowmem scenario */ - if (!pages) { - mutex_lock(&z_pagemap_global_lock); - pages = z_pagemap_global; - } - } + GFP_KERNEL | __GFP_NOFAIL); for (i = 0; i < nr_pages; ++i) pages[i] = NULL; @@ -1065,9 +1047,7 @@ out: z_erofs_onlinepage_endio(page); } - if (pages == z_pagemap_global) - mutex_unlock(&z_pagemap_global_lock); - else if (pages != pages_onstack) + if (pages != pages_onstack) kvfree(pages); pcl->nr_pages = 0; diff --git a/fs/erofs/zdata.h b/fs/erofs/zdata.h index 75f6fd435388..43c91bd2d84f 100644 --- a/fs/erofs/zdata.h +++ b/fs/erofs/zdata.h @@ -175,6 +175,5 @@ static inline void z_erofs_onlinepage_endio(struct page *page) #define Z_EROFS_VMAP_ONSTACK_PAGES \ min_t(unsigned int, THREAD_SIZE / 8 / sizeof(struct page *), 96U) -#define Z_EROFS_VMAP_GLOBAL_PAGES 2048 #endif |