Messages in this thread | | | Subject | Re: [Lhms-devel] [PATCH 0/7] Fragmentation Avoidance V19 | From | Adam Litke <> | Date | Mon, 07 Nov 2005 10:42:54 -0600 |
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On Fri, 2005-11-04 at 08:44 +0100, Eric Dumazet wrote: > Paul Jackson a écrit : > > Linus wrote: > > > >>Maybe you'd be willing on compromising by using a few kernel boot-time > >>command line options for your not-very-common load. > > > > > > If we were only a few options away from running Andy's varying load > > mix with something close to ideal performance, we'd be in fat city, > > and Andy would never have been driven to write that rant. > > I found hugetlb support in linux not very practical/usable on NUMA machines, > boot-time parameters or /proc/sys/vm/nr_hugepages. > > With this single integer parameter, you cannot allocate 1000 4MB pages on one > specific node, letting small pages on another node. > > I'm not an astrophysician, nor a DB admin, I'm only trying to partition a dual > node machine between one (numa aware) memory intensive job and all others > (system, network, shells). > At least I can reboot it if needed, but I feel Andy pain. > > There is a /proc/buddyinfo file, maybe we need a /proc/sys/vm/node_hugepages > with a list of integers (one per node) ?
Or perhaps /sys/devices/system/node/nodeX/nr_hugepages triggers that work like the current /proc trigger but on a per node basis?
-- Adam Litke - (agl at us.ibm.com) IBM Linux Technology Center
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