From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sowmini Varadhan Date: Fri, 19 Dec 2014 22:06:49 +0000 Subject: Re: [PATCH RFC sparc] Break up iommu from monolithic lock for the map to multiple pools/locks Message-Id: <20141219220649.GO4294@oracle.com> List-Id: References: <20141219151616.GB25248@oracle.com> In-Reply-To: <20141219151616.GB25248@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: sparclinux@vger.kernel.org On (12/19/14 15:56), David Miller wrote: > > That large_pool mechanism might help prevent the other pools from > getting fragmented and thus lead to premature allocation failures. I see. Looks like the scsi driver uses sun4v_pci to ask for 7-8 pages on occasion - I'll add the large_pool hooks in and test it with scsi, using some absurd check like (npages > 5) for the purpose of testing the large_pool code. --Sowmini