On 4/11/06, Asim <asimkadav@xxxxxxxxx> wrote:
What is blocksize_bits variable in file system drivers ? (in
superblock filling methods)
The number of bits that make up the filesystem block size. Say if filesystems block size is 512 bytes(s_blocksize field of struct super_block), the s_blocksize_bits =9 (since 2^9=512).
Why is set to PAGE_CACHE_SHIFT ?
Eg.
s_blocksize_bits = PAGE_CACHE_SHIFT
set because since s_blocksize = PAGE_CACHE_SIZE
The maximum file system block size is limited by the page cache size (which is 4k on x86 systems).
Thayumanavar S.
