From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id 7846F8D0040 for ; Wed, 2 Mar 2011 11:24:20 -0500 (EST) Received: from chimera.site ([173.50.240.230]) by xenotime.net for ; Wed, 2 Mar 2011 08:24:13 -0800 Date: Wed, 2 Mar 2011 08:24:12 -0800 From: Randy Dunlap Subject: Re: [RFC PATCH 1/5] x86/Kconfig: Add Page Cache Accounting entry Message-Id: <20110302082412.87f153ba.rdunlap@xenotime.net> In-Reply-To: <1299055090-23976-1-git-send-email-namei.unix@gmail.com> References: <1299055090-23976-1-git-send-email-namei.unix@gmail.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: Liu Yuan Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, jaxboe@fusionio.com, akpm@linux-foundation.org, fengguang.wu@intel.com On Wed, 2 Mar 2011 16:38:06 +0800 Liu Yuan wrote: > From: Liu Yuan > > Signed-off-by: Liu Yuan > --- > arch/x86/Kconfig.debug | 9 +++++++++ > 1 files changed, 9 insertions(+), 0 deletions(-) > > diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug > index 615e188..f29e32d 100644 > --- a/arch/x86/Kconfig.debug > +++ b/arch/x86/Kconfig.debug > @@ -304,4 +304,13 @@ config DEBUG_STRICT_USER_COPY_CHECKS > > If unsure, or if you run an older (pre 4.4) gcc, say N. > > +config PAGE_CACHE_ACCT > + bool "Page cache accounting" > + ---help--- > + Enabling this options to account for page cache hit/missed number of > + times. This would allow user space applications get better knowledge > + of underlying page cache system by reading virtual file. The statitics > + per partition are collected. > + > + If unsure, say N. > endmenu > -- rewrite: Enable this option to provide for page cache hit/miss counters. This allows userspace applications to obtain better knowledge of the underlying page cache subsystem by reading a virtual file. Statistics are collect per partition. questions: what virtual file? what kind of partition? --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code *** -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org