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btrfs: use predefined limits for calculating maximum number of pages for compression
Signed-off-by: David Sterba <dsterba@suse.com>
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parent
ff7638665c
commit
069eac7850
1 changed files with 6 additions and 5 deletions
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@ -432,8 +432,6 @@ static noinline void compress_file_range(struct inode *inode,
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unsigned long nr_pages;
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unsigned long total_compressed = 0;
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unsigned long total_in = 0;
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unsigned long max_compressed = SZ_128K;
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unsigned long max_uncompressed = SZ_128K;
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int i;
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int will_compress;
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int compress_type = fs_info->compress_type;
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@ -446,7 +444,9 @@ static noinline void compress_file_range(struct inode *inode,
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again:
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will_compress = 0;
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nr_pages = (end >> PAGE_SHIFT) - (start >> PAGE_SHIFT) + 1;
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nr_pages = min_t(unsigned long, nr_pages, SZ_128K / PAGE_SIZE);
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BUILD_BUG_ON((BTRFS_MAX_COMPRESSED % PAGE_SIZE) != 0);
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nr_pages = min_t(unsigned long, nr_pages,
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BTRFS_MAX_COMPRESSED / PAGE_SIZE);
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/*
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* we don't want to send crud past the end of i_size through
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@ -471,7 +471,8 @@ static noinline void compress_file_range(struct inode *inode,
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(start > 0 || end + 1 < BTRFS_I(inode)->disk_i_size))
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goto cleanup_and_bail_uncompressed;
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total_compressed = min(total_compressed, max_uncompressed);
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total_compressed = min_t(unsigned long, total_compressed,
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BTRFS_MAX_UNCOMPRESSED);
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num_bytes = ALIGN(end - start + 1, blocksize);
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num_bytes = max(blocksize, num_bytes);
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total_in = 0;
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@ -510,7 +511,7 @@ static noinline void compress_file_range(struct inode *inode,
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&nr_pages,
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&total_in,
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&total_compressed,
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max_compressed);
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BTRFS_MAX_COMPRESSED);
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if (!ret) {
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unsigned long offset = total_compressed &
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