From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Date: Fri, 13 Feb 2004 23:13:08 +0000 Subject: Re: mpt sets 64bit consistent mask yet requires mapping in same 4 GB chunk?!? Message-Id: <20040213231308.GT31168@parcelfarce.linux.theplanet.co.uk> List-Id: References: <0E3FA95632D6D047BA649F95DAB60E5703EF915E@exa-atlanta.se.lsil.com> <20040213213043.GB20323@sgi.com> <200402131552.43935.bjorn.helgaas@hp.com> In-Reply-To: <200402131552.43935.bjorn.helgaas@hp.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Bjorn Helgaas Cc: Jesse Barnes , "Moore, Eric Dean" , Alex Williamson , jeremy@sgi.com, linux-scsi@vger.kernel.org, linux-ia64@vger.kernel.org On Fri, Feb 13, 2004 at 03:52:43PM -0700, Bjorn Helgaas wrote: > > I think Alex's second suggestion would be the best--do a single > > allocation rather than falling back to a 32 bit consistent mask. > > But even with a single allocation, there's nothing to prevent it > from crossing a 4GB boundary, is there? Since we use buddy allocators everywhere, we'd need to be doing 8GB allocations to cross a 4GB barrier. Of course if we change allocators ... -- "Next the statesmen will invent cheap lies, putting the blame upon the nation that is attacked, and every man will be glad of those conscience-soothing falsities, and will diligently study them, and refuse to examine any refutations of them; and thus he will by and by convince himself that the war is just, and will thank God for the better sleep he enjoys after this process of grotesque self-deception." -- Mark Twain