Commit e617fce6 authored Apr 25, 2008 by Hidetoshi Seto Committed by Tony Luck Apr 29, 2008

[IA64] bugfix: nptcg breaks cpu-hotadd



If "max_purges" from PAL is 0, it actually means 1.

However it was not handled later when a hot-added cpu pass the
max_purges from PAL.  This makes systems easy to go BUG_ON().

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

parent 7663c1e2

arch/ia64/mm/tlb.c

+4 −1

Original line number	Original line	Diff line number	Diff line
	@@ -168,6 +168,9 @@ setup_ptcg_sem(int max_purges, int nptcg_from)
	static int firstcpu = 1;		static int firstcpu = 1;

	if (toolatetochangeptcgsem) {		if (toolatetochangeptcgsem) {
			if (nptcg_from == NPTCG_FROM_PAL && max_purges == 0)
			BUG_ON(1 < nptcg);
			else
	BUG_ON(max_purges < nptcg);		BUG_ON(max_purges < nptcg);
	return;		return;
	}		}