[Ocfs2-devel] Patch to remove the code to zero buffer in ocfs_extend_file() completely.

[Zhang, Sonic]

Hi,

	We found the code to zero buffer in ocfs_extend_file() is
completely unnecessary for both directory creating and file writing. In
kernel routine block_read_full_page(), the unmapped buffer is retrieved
via ocfs_get_block() and set to zero immediately even if it is already
zeroed in the ocfs_extend_file().

	After remove this code, the performance of ocfs_extend_file()
increase greatly.

	So, we suggest remove it. See the attachment.




*********************************************
Sonic Zhang
Software Engineer
Intel China Software Lab
Tel: (086)021-52574545-1667
iNet: 752-1667
*********************************************  

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