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Message-Id: <20070430154947.A3ABB151CA@wotan.suse.de> Date: Mon, 30 Apr 2007 17:49:47 +0200 (CEST) From: Andi Kleen <ak@...e.de> To: fernando@....ntt.co.jp, patches@...-64.org, linux-kernel@...r.kernel.org Subject: [PATCH] [15/34] x86_64: Use safe_apic_wait_icr_idle in __send_IPI_dest_field - x86_64 From: Fernando Luis [** ISO-8859-1 charset **] VázquezCao <fernando@....ntt.co.jp> Use safe_apic_wait_icr_idle to check ICR idle bit if the vector is NMI_VECTOR to avoid potential hangups in the event of crash when kdump tries to stop the other CPUs. Signed-off-by: Fernando Luis Vazquez Cao <fernando@....ntt.co.jp> Signed-off-by: Andi Kleen <ak@...e.de> --- --- include/asm-x86_64/ipi.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) Index: linux/include/asm-x86_64/ipi.h =================================================================== --- linux.orig/include/asm-x86_64/ipi.h +++ linux/include/asm-x86_64/ipi.h @@ -85,7 +85,10 @@ static inline void __send_IPI_dest_field /* * Wait for idle. */ - apic_wait_icr_idle(); + if (unlikely(vector == NMI_VECTOR)) + safe_apic_wait_icr_idle(); + else + apic_wait_icr_idle(); /* * prepare target chip field - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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