http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/ufs/ffs/ffs_alloc.c
you may want to investigate revision 1.62.
* Luigi Rizzo <[EMAIL PROTECTED]> [000212 03:19] wrote:
> Hi,
> I have a question related to ufs block allocation.
> This problem arises when building picobsd floppy on /dev/fd0
> (ufs with 512/4096 fragments/blocks).
>
> With 3.4, i can easily fill up a disk to 100% occupation.
>
> With -current (20000127), i often fail to write a file (say 53KB)
> on disk even though there _is_ room (say 55KB), and if i split the file
> in multiple parts i can write on that disk even more bytes
> than the original file size.
>
> It looks like there is some change related to the use of file
> system fragments, the feeling i have is that there is
> something like
>
> "if you need to write a full block, don't look for
> fragments but for a full block'.
>
> Does the above sound reasonable, and if so, would it be difficult
> to change the behaviour to make use of fragments if there is
> no better option ?
>
> cheers
> luigi
> -----------------------------------+-------------------------------------
> Luigi RIZZO, [EMAIL PROTECTED] . Dip. di Ing. dell'Informazione
> http://www.iet.unipi.it/~luigi/ . Universita` di Pisa
> TEL/FAX: +39-050-568.533/522 . via Diotisalvi 2, 56126 PISA (Italy)
> Mobile +39-347-0373137
> -----------------------------------+-------------------------------------
>
>
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