How about dividing it up in a little loop? Issue Q D DETAILS 000-FFF, Q DA DETAILS 1000-1FFF....
-----Original Message----- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Michael MacIsaac Sent: Monday, July 13, 2015 7:42 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: [LINUX-390] How to find a memory leak? Ursula, Any chance the requirement for contiguous memory in vmcp could be relaxed? In my test case, 'Q DA DETAILS 0-FFFF' requires ~2.5 MB and, as I understand it, that output can simply not be obtained through vmcp. Thanks. -Mike MacIsaac On Mon, Jul 13, 2015 at 10:28 AM, Ursula Braun <ubr...@linux.vnet.ibm.com> wrote: > Tomas, > > the qeth driver has been improved in 2014 to reduce its demand for > contiguous storage: > > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ > drivers/s390/net/qeth_core.h?id=d445a4e28c0ff740e946ae22860be85428814c > 39 > > Regards, Ursula Braun, IBM Germany, Linux on System z Dev. > > On Mon, 2015-07-13 at 13:39 +0000, Pavelka, Tomas 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" ;-) > > > > Tomas > > > > -------------------------------------------------------------------- > > -- For LINUX-390 subscribe / signoff / archive access instructions, > > send email to lists...@vm.marist.edu 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/ > > > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, send > email to lists...@vm.marist.edu 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/ > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu 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/
