From e617fce64e5faea149fcf3bffc1b42e4ba29e7e5 Mon Sep 17 00:00:00 2001 From: Hidetoshi Seto Date: Fri, 25 Apr 2008 23:13:09 +0900 Subject: [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 Signed-off-by: Tony Luck --- arch/ia64/mm/tlb.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/ia64/mm/tlb.c b/arch/ia64/mm/tlb.c index d52ec4e8340..8caf42471f0 100644 --- a/arch/ia64/mm/tlb.c +++ b/arch/ia64/mm/tlb.c @@ -168,7 +168,10 @@ setup_ptcg_sem(int max_purges, int nptcg_from) static int firstcpu = 1; if (toolatetochangeptcgsem) { - BUG_ON(max_purges < nptcg); + if (nptcg_from == NPTCG_FROM_PAL && max_purges == 0) + BUG_ON(1 < nptcg); + else + BUG_ON(max_purges < nptcg); return; } -- cgit v1.2.3