On Thu, Jun 19, 2025 at 04:47:14AM -0400, Steven Rostedt wrote: > On Thu, 19 Jun 2025 09:56:11 +0200 > Peter Zijlstra <pet...@infradead.org> wrote: > > > Well, the trivial solution is to make it 511 and call it a day. Don't > > make things complicated if you don't have to. > > I don't know if this is more complicated, but it should make it fit > nicely in a page: > > /* Make the cache fit in a page */ > #define UNWIND_MAX_ENTRIES \ > ((PAGE_SIZE - sizeof(struct unwind_cache)) / sizeof(long))
Right, that's the fancy way of spelling 511 :-) Except on 32bit, where it now spells 1023 instead. Did you want that bitness difference? Also, you ready for some *reaaally* big numbers on Power/ARM with 64K pages? :-)
