This is a similar change to those in ext2/ext3 codebase (commit 40a063f6691ce937 and a4ae3094869f18e2, respectively).
The addition of 64k block capability in the rec_len_from_disk and rec_len_to_disk functions added a bit of math overhead which slows down file create workloads needlessly when the architecture cannot even support 64k blocks. This will cut the corner. Signed-off-by: Ryusuke Konishi <[email protected]> --- fs/nilfs2/ioctl.c | 1 + include/linux/nilfs2_fs.h | 4 ++++ 2 files changed, 5 insertions(+), 0 deletions(-) diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c index d89173e..5471eed 100644 --- a/fs/nilfs2/ioctl.c +++ b/fs/nilfs2/ioctl.c @@ -28,6 +28,7 @@ #include <linux/vmalloc.h> #include <linux/compat.h> /* compat_ptr() */ #include <linux/mount.h> /* mnt_want_write(), mnt_drop_write() */ +#include <linux/buffer_head.h> #include <linux/nilfs2_fs.h> #include "nilfs.h" #include "segment.h" diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h index fdcd1bc..3a65e5a 100644 --- a/include/linux/nilfs2_fs.h +++ b/include/linux/nilfs2_fs.h @@ -326,17 +326,21 @@ static inline unsigned nilfs_rec_len_from_disk(__le16 dlen) { unsigned len = le16_to_cpu(dlen); +#if !defined(__KERNEL__) || (PAGE_CACHE_SIZE >= 65536) if (len == NILFS_MAX_REC_LEN) return 1 << 16; +#endif return len; } static inline __le16 nilfs_rec_len_to_disk(unsigned len) { +#if !defined(__KERNEL__) || (PAGE_CACHE_SIZE >= 65536) if (len == (1 << 16)) return cpu_to_le16(NILFS_MAX_REC_LEN); else if (len > (1 << 16)) BUG(); +#endif return cpu_to_le16(len); } -- 1.7.3.5 -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
