> Finally some success. I booted into my reiserfs partition with
> the xfs-enabled kernel from cvs and mounted the xfs partition
> with biosize=13 (as you suggested) and chroot:ted there.
> Voila,
>
> /etc/mail > mount
> /dev/hda6 on / type xfs (rw,biosize=13)
> proc on /proc type proc (rw)
> none on proc type proc (rw)
> root@marvin:/etc/mail > time make
> Rebuilding /etc/mail/access.db.
> makemap hash -f /etc/mail/access.db < /etc/mail/access
> test -e /etc/mail/access.db && touch /etc/mail/access.db
>
> real 0m0.081s
> user 0m0.050s
> sys 0m0.030s
> root@marvin:/etc/mail >
>
> Ok so it was cached this time but even the first time I run the
> comman it was quite satisfactory. Now, back to the manual.
> What is biosize=13 :-) and how do I set the lilo option. I find
> out. Thanks for all help.
The biosize mount option sets the default I/O size reported by xfs to be
that power of 2 - so 8K in this case, 8K is the lowest it will go without
code changes. This affects the st_blksize reported by stat which is being
used by various applications to determine the size to use for operations.
It may be that use of this field is a little different on Linux and Irix
and having it default to 64K is more problem than it is worth. It also looks
like there is no generic mechanism for passing mount options for the root
filesystem.
If you want to change the values used by default you can do this by changing
some constants in fs/xfs/xfs_mount.h and rebuilding. Change these values:
/*
* Default minimum read and write sizes.
*/
#define XFS_READIO_LOG_SMALL 15 /* <= 32MB memory */
#define XFS_WRITEIO_LOG_SMALL 15
#define XFS_READIO_LOG_LARGE 16 /* > 32MB memory */
#define XFS_WRITEIO_LOG_LARGE 16
To all be 13
Steve
>
> Greetings,
> jarek
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