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authorHuang Ying <ying.huang@intel.com>2011-07-13 13:14:27 +0800
committerLen Brown <len.brown@intel.com>2011-08-03 11:15:58 -0400
commitea8f5fb8a71fddaf5f3a17100d3247855701f732 (patch)
tree052c3f7e699745394a35063d2a58c4ef0995f3c5 /include
parent152cef40a808d3034e383465b3f7d6783613e458 (diff)
HWPoison: add memory_failure_queue()
memory_failure() is the entry point for HWPoison memory error recovery. It must be called in process context. But commonly hardware memory errors are notified via MCE or NMI, so some delayed execution mechanism must be used. In MCE handler, a work queue + ring buffer mechanism is used. In addition to MCE, now APEI (ACPI Platform Error Interface) GHES (Generic Hardware Error Source) can be used to report memory errors too. To add support to APEI GHES memory recovery, a mechanism similar to that of MCE is implemented. memory_failure_queue() is the new entry point that can be called in IRQ context. The next step is to make MCE handler uses this interface too. Signed-off-by: Huang Ying <ying.huang@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 9670f71d7be..303108eed28 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1633,6 +1633,7 @@ enum mf_flags {
};
extern void memory_failure(unsigned long pfn, int trapno);
extern int __memory_failure(unsigned long pfn, int trapno, int flags);
+extern void memory_failure_queue(unsigned long pfn, int trapno, int flags);
extern int unpoison_memory(unsigned long pfn);
extern int sysctl_memory_failure_early_kill;
extern int sysctl_memory_failure_recovery;