Messages in this thread | | | Date | Mon, 20 Apr 2015 22:59:23 +0100 | From | Al Viro <> | Subject | Re: [PATCH 16/24] link_path_walk: kill the recursion |
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On Mon, Apr 20, 2015 at 02:42:56PM -0700, Linus Torvalds wrote: > On Mon, Apr 20, 2015 at 2:41 PM, Linus Torvalds > <torvalds@linux-foundation.org> wrote: > > > > And no, we will *never* lift the recursion limit. Not for 1kB, not for > > 1MB. Never. > > Just to clarify: that's for the "remove restrictions completely". > Upping it to 32 or 40 would be fine. But not with allocations on the > stack.
Yep. There are two restrictions - one on the total amount of symlinks encountered (40), and another on the depth of nesting (8). The latter is due to recursion issues, and with dynamic nd->stack it goes away. The former, of course, stays, for the reasons you've mentioned - it has nothing to do with the depth of recursion.
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