From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail190.messagelabs.com (mail190.messagelabs.com [216.82.249.51]) by kanga.kvack.org (Postfix) with ESMTP id 874716B00EC for ; Wed, 17 Nov 2010 04:05:08 -0500 (EST) Date: Wed, 17 Nov 2010 04:04:57 -0500 From: Christoph Hellwig Subject: Re: Propagating GFP_NOFS inside __vmalloc() Message-ID: <20101117090457.GA30543@infradead.org> References: <1289421759.11149.59.camel@oralap> <20101111120643.22dcda5b.akpm@linux-foundation.org> <1289512924.428.112.camel@oralap> <20101111142511.c98c3808.akpm@linux-foundation.org> <1289840500.13446.65.camel@oralap> <20101116141130.b20a8a8d.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org To: David Rientjes Cc: Andreas Dilger , Andrew Morton , "Ricardo M. Correia" , linux-mm@kvack.org, Brian Behlendorf List-ID: On Tue, Nov 16, 2010 at 11:37:39PM -0800, David Rientjes wrote: > If you _really_ need 1MB of physically contiguous memory, then you'll need > to find a way to do it in a reclaimable context. If we actually can > remove the dependency that gfs2, ntfs, and ceph have in the kernel.org > kernel, then this support may be pulled out from under you; the worst-case > scenario for Lustre is that you'll have to modify the callchains like I > suggested in my original email to pass the gfp mask all the way down to > the pte allocators if you can't find a way to do it under GFP_KERNEL. As Dave mentioned XFS also needs GFP_NOFS allocations in the low-level vmap machinery, which is shared with vmalloc. -- 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 policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org