From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ea0-f181.google.com (mail-ea0-f181.google.com [209.85.215.181]) by kanga.kvack.org (Postfix) with ESMTP id C3E4E6B003D for ; Mon, 9 Dec 2013 10:50:04 -0500 (EST) Received: by mail-ea0-f181.google.com with SMTP id m10so1666615eaj.12 for ; Mon, 09 Dec 2013 07:50:04 -0800 (PST) Received: from mx2.suse.de (cantor2.suse.de. [195.135.220.15]) by mx.google.com with ESMTP id e2si10067467eeg.156.2013.12.09.07.50.03 for ; Mon, 09 Dec 2013 07:50:03 -0800 (PST) Date: Mon, 9 Dec 2013 16:50:02 +0100 From: Michal Hocko Subject: Re: [PATCH] mm: add show num_poisoned_pages when oom Message-ID: <20131209155002.GE3597@dhcp22.suse.cz> References: <52A592DE.7010302@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <52A592DE.7010302@huawei.com> Sender: owner-linux-mm@kvack.org List-ID: To: Xishi Qiu Cc: Andrew Morton , KOSAKI Motohiro , Mel Gorman , rientjes@google.com, LKML , linux-mm@kvack.org On Mon 09-12-13 17:52:30, Xishi Qiu wrote: > Show num_poisoned_pages when oom, it is helpful to find the reason. > > Signed-off-by: Xishi Qiu I would not expect the number of these pages would be too high to matter in real life but having the information cannot be harmful in any way. Acked-by: Michal Hocko > --- > lib/show_mem.c | 3 +++ > 1 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/lib/show_mem.c b/lib/show_mem.c > index 5847a49..1cbdcd8 100644 > --- a/lib/show_mem.c > +++ b/lib/show_mem.c > @@ -46,4 +46,7 @@ void show_mem(unsigned int filter) > printk("%lu pages in pagetable cache\n", > quicklist_total_size()); > #endif > +#ifdef CONFIG_MEMORY_FAILURE > + printk("%lu pages poisoned\n", atomic_long_read(&num_poisoned_pages)); > +#endif > } > -- > 1.7.1 > -- Michal Hocko SUSE Labs -- 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