From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: Re: [patch] fs: improved handling of page and buffer IO errors Date: Wed, 22 Oct 2008 08:35:11 -0600 Message-ID: <20081022143511.GF26094@parisc-linux.org> References: <20081021133814.GA26942@fogou.chygwyn.com> <20081021143518.GA7158@2ka.mipt.ru> <20081021145901.GA28279@fogou.chygwyn.com> <20081021162957.GQ26184@parisc-linux.org> <20081022124829.GA826@shareable.org> <20081022134531.GE26094@parisc-linux.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: jamie@shareable.org, steve@chygwyn.com, zbr@ioremap.net, npiggin@suse.de, akpm@linux-foundation.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org To: Miklos Szeredi Return-path: Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org On Wed, Oct 22, 2008 at 04:02:22PM +0200, Miklos Szeredi wrote: > On Wed, 22 Oct 2008, Matthew Wilcox wrote: > > On Wed, Oct 22, 2008 at 01:48:29PM +0100, Jamie Lokier wrote: > > > Matthew Wilcox wrote: > > > > Careful with those slurs you're throwing around. PA-RISC carefully > > > > aligns its mmaps so they are coherent. > > > > > > (Unless you use MAP_FIXED?) > > > > Doctor, it hurts when I point this gun at my foot and pull the trigger > > ... > > And remap_file_pages() also. Neither that nor MAP_FIXED are widely > used, but still, coherency is not a completely solved issue. remap_file_pages() only hurts if you map the same page more than once (which is permitted, but again, I don't think anyone actually does that). -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- 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