Messages in this thread |  | | Date | Tue, 30 Oct 2001 13:33:09 +0100 | From | Jan Kara <> | Subject | Re: RFC - tree quotas for Linux (2.4.12, ext2) |
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> On Monday October 29, jack@suse.cz wrote: > > > > > > I accept that it does look like a bit of a hack. > > > But I think it is simple, understandable, and predictable. > > > And I think that (for me) the value of tree quotas is more than enough > > > to offset that cost. > > I just don't like the idea that when you do lookup you can suddenly get > > Disk quota exceeded... I'd concern this behaviour a bit nonintuitive. I agree > > that if root makes lookup of every file after moving directories then this > > doesn't happen but still I don't like the design :). > > > > You cannot get "Disk quota exceeded" on a lookup. If treequota_check > finds a discrepancy it fixes it with "notify_change" with > ia_valid set to ATTR_FORCE | ATTR_TID. > I changed quota_transfer to take ATTR_FORCE to mean "just do it, even > if it exceeds quota, and don't give an error". Given that ATTR_FORCE > is not actually used at all in the current kernel, I felt fairly free > to interpret it how I wanted. Hmm.. I should have read your patch more carefuly.. Sorry.
> So the only non-intuitive thing that can happen is that you find your > usage mysteriously changes. However this can only happen after > administrator intervention, and with uid quotas administrator > intervention (e.g. chown -R) can equally cause mysterious changes of > usage. > > However I'm not particularly trying to convince anyone to use or > approve of tree-quotas. I was after comments to make sure that I > hadn't missed something in thinking through the issues. I thank you > and others for your comments. The fact that I am comfortable with my > answers (though you may not be) encourages me that I haven't missed > anything. > > I will be using treequotas locally next year and will keep the > patches on my web-page up-to-date. I have heard from at least one > person who thinks they might be useful, so there are probably a few > dozen who might find it useful. :) I also think tree quotas are useful I'd just like to think of some nicer solution...:)
Honza -- Jan Kara <jack@suse.cz> SuSE CR Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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