From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qc0-f181.google.com (mail-qc0-f181.google.com [209.85.216.181]) by kanga.kvack.org (Postfix) with ESMTP id DE5546B0038 for ; Wed, 6 May 2015 22:25:42 -0400 (EDT) Received: by qcyk17 with SMTP id k17so14763864qcy.1 for ; Wed, 06 May 2015 19:25:42 -0700 (PDT) Received: from cdptpa-oedge-vip.email.rr.com (cdptpa-outbound-snat.email.rr.com. [107.14.166.230]) by mx.google.com with ESMTP id f199si709719qhc.20.2015.05.06.19.25.40 for ; Wed, 06 May 2015 19:25:41 -0700 (PDT) Date: Wed, 6 May 2015 22:25:51 -0400 From: Steven Rostedt Subject: Re: [PATCH v4 3/3] tracing: add trace event for memory-failure Message-ID: <20150506222551.56108f53@grimm.local.home> In-Reply-To: <1429519480-11687-4-git-send-email-xiexiuqi@huawei.com> References: <1429519480-11687-1-git-send-email-xiexiuqi@huawei.com> <1429519480-11687-4-git-send-email-xiexiuqi@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Xie XiuQi Cc: n-horiguchi@ah.jp.nec.com, mingo@redhat.com, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, koct9i@gmail.com, hpa@linux.intel.com, hannes@cmpxchg.org, iamjoonsoo.kim@lge.com, luto@amacapital.net, nasa4836@gmail.com, gong.chen@linux.intel.com, bhelgaas@google.com, bp@suse.de, tony.luck@intel.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, jingle.chen@huawei.com On Mon, 20 Apr 2015 16:44:40 +0800 Xie XiuQi wrote: > --- a/include/ras/ras_event.h > +++ b/include/ras/ras_event.h > @@ -11,6 +11,7 @@ > #include > #include > #include > +#include > > /* > * MCE Extended Error Log trace event > @@ -232,6 +233,90 @@ TRACE_EVENT(aer_event, > __print_flags(__entry->status, "|", aer_uncorrectable_errors)) > ); > > +/* > + * memory-failure recovery action result event > + * > + * unsigned long pfn - Page Frame Number of the corrupted page > + * int type - Page types of the corrupted page > + * int result - Result of recovery action > + */ > + > +#ifdef CONFIG_MEMORY_FAILURE > +#define MF_ACTION_RESULT \ > + EM ( MF_IGNORED, "Ignord" ) \ "Ignored" ? > + EM ( MF_FAILED, "Failed" ) \ > + EM ( MF_DELAYED, "Delayed" ) \ > + EMe ( MF_RECOVERED, "Recovered" ) > + > +#define MF_PAGE_TYPE \ > + EM ( MF_MSG_KERNEL, "reserved kernel page" ) \ > + EM ( MF_MSG_KERNEL_HIGH_ORDER, "high-order kernel page" ) \ > + EM ( MF_MSG_SLAB, "kernel slab page" ) \ > + EM ( MF_MSG_DIFFERENT_COMPOUND, "different compound page after locking" ) \ > + EM ( MF_MSG_POISONED_HUGE, "huge page already hardware poisoned" ) \ > + EM ( MF_MSG_HUGE, "huge page" ) \ > + EM ( MF_MSG_FREE_HUGE, "free huge page" ) \ > + EM ( MF_MSG_UNMAP_FAILED, "unmapping failed page" ) \ > + EM ( MF_MSG_DIRTY_SWAPCACHE, "dirty swapcache page" ) \ > + EM ( MF_MSG_CLEAN_SWAPCACHE, "clean swapcache page" ) \ > + EM ( MF_MSG_DIRTY_MLOCKED_LRU, "dirty mlocked LRU page" ) \ > + EM ( MF_MSG_CLEAN_MLOCKED_LRU, "clean mlocked LRU page" ) \ > + EM ( MF_MSG_DIRTY_UNEVICTABLE_LRU, "dirty unevictable LRU page" ) \ > + EM ( MF_MSG_CLEAN_UNEVICTABLE_LRU, "clean unevictable LRU page" ) \ > + EM ( MF_MSG_DIRTY_LRU, "dirty LRU page" ) \ > + EM ( MF_MSG_CLEAN_LRU, "clean LRU page" ) \ > + EM ( MF_MSG_TRUNCATED_LRU, "already truncated LRU page" ) \ > + EM ( MF_MSG_BUDDY, "free buddy page" ) \ > + EM ( MF_MSG_BUDDY_2ND, "free buddy page (2nd try)" ) \ > + EMe ( MF_MSG_UNKNOWN, "unknown page" ) > + > +/* > + * First define the enums in MM_ACTION_RESULT to be exported to userspace > + * via TRACE_DEFINE_ENUM(). > + */ > +#undef EM > +#undef EMe > +#define EM(a,b) TRACE_DEFINE_ENUM(a); > +#define EMe(a,b) TRACE_DEFINE_ENUM(a); > + > +MF_ACTION_RESULT > +MF_PAGE_TYPE > + > +/* > + * Now redefine the EM() and EMe() macros to map the enums to the strings > + * that will be printed in the output. > + */ > +#undef EM > +#undef EMe > +#define EM(a,b) { a, b }, > +#define EMe(a,b) { a, b } > + > +TRACE_EVENT(memory_failure_event, > + TP_PROTO(unsigned long pfn, > + int type, > + int result), > + > + TP_ARGS(pfn, type, result), > + > + TP_STRUCT__entry( > + __field(unsigned long, pfn) > + __field(int, type) > + __field(int, result) > + ), > + > + TP_fast_assign( > + __entry->pfn = pfn; > + __entry->type = type; > + __entry->result = result; > + ), > + > + TP_printk("pfn %#lx: recovery action for %s: %s", Hmm, "%#" is new to me. I'm not sure libtraceevent handles that. Not your problem, I need to make sure that it does, and if it does not, I need to fix it. I'm not even sure what %# does. Other than the typo, Acked-by: Steven Rostedt -- Steve > + __entry->pfn, > + __print_symbolic(__entry->type, MF_PAGE_TYPE), > + __print_symbolic(__entry->result, MF_ACTION_RESULT) > + ) > +); > +#endif /* CONFIG_MEMORY_FAILURE */ > #endif /* _TRACE_HW_EVENT_MC_H */ > > /* This part must be outside protection */ > diff --git a/mm/memory-failure.c b/mm/memory-failure.c > index f074f8e..42c5981 100644 > --- a/mm/memory-failure.c > +++ b/mm/memory-failure.c > @@ -56,6 +56,7 @@ > #include > #include > #include "internal.h" > +#include "ras/ras_event.h" > > int sysctl_memory_failure_early_kill __read_mostly = 0; > > @@ -850,6 +851,8 @@ static struct page_state { > static void action_result(unsigned long pfn, enum mf_action_page_type type, > enum mf_result result) > { > + trace_memory_failure_event(pfn, type, result); > + > pr_err("MCE %#lx: recovery action for %s: %s\n", > pfn, action_page_types[type], action_name[result]); > } -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org