Re: [Lhms-devel] [PATCH 0/7] Fragmentation Avoidance V19

From: Adam Litke (agl_at_us.ibm.com)
Date: 11/07/05

  • Next message: Xose Vazquez Perez: "Re: [ANNOUNCE] Ubuntu kernel tree" 
    To: Eric Dumazet <dada1@cosmosbay.com>
Date:	Mon, 07 Nov 2005 10:42:54 -0600

    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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  • Next message: Xose Vazquez Perez: "Re: [ANNOUNCE] Ubuntu kernel tree"

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