Re: [PATCH 2.6.18-rc1] Make group sorting optional in the 2.6.x kernels

From: Frank van Maarseveen
Date: Thu Jul 20 2006 - 05:34:17 EST

On Thu, Jul 20, 2006 at 08:17:47AM +1200, Bill Ryder wrote:
> As an aside Frank - can you point at a paper which provides a
> walkthrough of how your patch works and what the caveats are?

> For example
> /top(0)/p1(2)/p3(2)/p4(2)/p5(6)/file1(6)
> /top(0)/p1(2)/p3(2)/p4(2)/p6(7)/file2(7)
> /top(0)/p1(2)/p3(2)/p4(2)/p7(8)/file3(6)
> /top(0)/p1(2)/p3(2)/p4(2)/p7(8)/file4(8)
> And so on - where the (n) indicated the (gid) for that directory/file.
> So most of our directories are in the same group. But as you get further
> down the tree the groups start to change.
> The process will belong to > 16 groups.

setgroups() require privilege. I don't understand how the above is
supposed to work for non-root users needing >16 groups. And when you're
root it is silly to play these group games for getting access.

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