From mboxrd@z Thu Jan 1 00:00:00 1970 From: Piergiorgio Sartor Subject: stripe cache question Date: Thu, 24 Feb 2011 22:06:43 +0100 Message-ID: <20110224210642.GA20306@lazy.lzy> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi all, few posts ago was mentioned that the unit of the stripe cache are "pages per device", usually 4K pages. Questions: 1) Does "device" means raid (md) device or component device (HDD)? 2) The max possible value seems to be 32768, which means, in case of 4K page per md device, a max of 128MiB of RAM. Is this by design? Would it be possible to increase up to whatever is available? Thanks, bye, -- piergiorgio