[patch] giant-less quotas for UFS

[Kostik Belousov]

I already mailed about my development of the patch that
allows for UFS with quotas to operate without Giant. Sorry if the
repeat would be annoying.

I have spent time from my previous announcement testing the patch
and bringing it up with HEAD. With current version, patched system
successfully builds/tests the perl 5.8.8 simultaneously with cycle like

while quotaon <mount point> && quotaoff <mount point>; do : ; done

and periodical quota editing for the user owning the build processes. This
includes the lowering/increasing inode/block quotas below/over current
allocation numbers.

I think that the patch is stable enough to ask for the wider testing
and review.

For the description of the patch, see
http://kostikbel.narod.ru/quotagiant/

Current (as of today) version of the patch:
http://kostikbel.narod.ru/quotagiant/quotas-20060329-1738.patch

Please, could you give the patch more testing and exposure ?
Your criticism and suggestions are strongly appreciated.

Best regards,
Kostik Belousov.
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