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    Subjectclarification about redhat and vm
    On Thu, Jan 17, 2002 at 01:26:07PM +0000, Alan Cox wrote:
    > > If redhat doesn't use the -aa VM into their kernels that's either a
    > > political decision or they're not good enough at the VM. I can tell you
    >
    > If you want to insult the Red Hat people please don't do it from a SuSE
    > address. There are some great people at SuSE and I somehow doubt you speak
    > for the management or major stockholders (ibm etc)

    do you plan to sue me as well? :)

    "If redhat doesn't use the -aa VM " was a short form of "if redhat
    cannot see the goodness of all the bugfixing work that happened between
    the 2.4.9 VM and any current branch 2.4, and so if they keep shipping
    2.4.9 VM as the best one for DBMS and critical VM apps like the SAP
    benchmark".

    I think it's fair enough to say that if you plan to keep shipping 2.4.9
    VM with all its troubles like I understood yesterday (starting from VM
    highmem deadlocks, to kswapd looping into ZONE_DMA etc..., swap storms
    throwing the realistic SAP benchmark to /dev/null) that was not usable
    on long uptimes on big DBMS with several gigabytes of ram.

    Somebody else also complained me about this saying that from what I said
    it looks like the -aa VM is the best thing possible which is obviously
    not true. In such two lines I said -aa VM just to go short. The -aa VM
    in 2.4.18pre2aa2 is obviously certainly not the best that you can make
    and I suggest everybody to try to make things better and invent and try
    new algorithm etc... that is just the best compromise that _I_ could
    make so far. So it is obvious if anybody doesn't use the -aa VM in
    2.4.18pre2aa2 it doesn't mean he doesn't understand about VM. as far I
    can tell rmap could be an order of magnitude better of -aa VM in
    2.4.18pre2aa2, it's just I didn't checked it yet (because of all the non
    obvious implication the rmap design adds, see DaveM emails of one year
    back to linux-mm). All my wondering in my previous email was between
    2.4.9 VM with all its known troubles and a sane version of the current
    vm like in 2.4.18pre2aa2. So about the past and the present, not about
    the present and the future. I thought it was obvious from the context of
    the email. I said this in two lines and apparently RedHat didn't like
    it, I'm sorry, but quite frankly I think that was quite fair enough, at
    least with this additional clarification added.

    Andrea
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