On Monday, 07/13/2015 at 09:40 EDT, "Pavelka, Tomas" <[email protected]> wrote: > > I wouldn't really put that at the feet of s390 (z/Architecture). > > Bad wording on my part. When I said s390 I meant the s390 part of the Linux > kernel implementation, not the entire architecture. I meant to point out that > the other parts of the kernel are working on getting out of the requirement of > large contiguous buffers. AFAIK the vmcp driver uses the largest buffer and as > you say, if the diag allowed to return discontiguous memory then it would solve > the fragmentation problem. There are few other places that used larger buffers, > NIC driver was one of them. So not sure if "all over" was the good wording > either, maybe I should have said "multiple places" ;-)
The QDIO architecture doesn't require contiguous page frames. Alan Altmark Senior Managing z/VM and Linux Consultant Lab Services System z Delivery Practice IBM Systems & Technology Group ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 [email protected] IBM Endicott ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
