From 648ed94038c030245a06e4be59744fd5cdc18c40 Mon Sep 17 00:00:00 2001 From: "Chen, Gong" Date: Wed, 12 Aug 2015 18:29:34 +0200 Subject: x86/mce: Provide a lockless memory pool to save error records printk() is not safe to use in MCE context. Add a lockless memory allocator pool to save error records in MCE context. Those records will be issued later, in a printk-safe context. The idea is inspired by the APEI/GHES driver. We're very conservative and allocate only two pages for it but since we're going to use those pages throughout the system's lifetime, we allocate them statically to avoid early boot time allocation woes. Signed-off-by: Chen, Gong [ Rewrite. ] Signed-off-by: Borislav Petkov Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Tony Luck Link: http://lkml.kernel.org/r/1439396985-12812-3-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/x86/Kconfig') diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index b3a1a5d77d92..06dbb5da90c6 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -955,6 +955,7 @@ config X86_REROUTE_FOR_BROKEN_BOOT_IRQS config X86_MCE bool "Machine Check / overheating reporting" + select GENERIC_ALLOCATOR default y ---help--- Machine Check support allows the processor to notify the -- cgit v1.2.2