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    SubjectRe: [PATCH] x86_64 irq: reuse vector for set_xxx_irq_affinity in phys flat mode
    On Mon, Oct 23, 2006 at 10:45:19PM +0200, Adrian Bunk wrote:
    > On Mon, Oct 23, 2006 at 09:32:57AM -0600, Eric W. Biederman wrote:
    > > "Yinghai Lu" <yinghai.lu@amd.com> writes:
    > >
    > > > in phys flat mode, when using set_xxx_irq_affinity to irq balance from
    > > > one cpu to another, _assign_irq_vector will get to increase last used
    > > > vector and get new vector. this will use up the vector if enough
    > > > set_xxx_irq_affintiy are called. and end with using same vector in
    > > > different cpu for different irq. (that is not what we want, we only
    > > > want to use same vector in different cpu for different irq when more
    > > > than 0x240 irq needed). To keep it simple, the vector should be resued
    > > > from one cpu to another instead of getting new vector.
    > > >
    > > > Signed-off-by: Yinghai Lu <yinghai.lu@amd.com>
    > >
    > > YH. I think the concept is sound. I don't think this is a bug fix, just
    > > an optimization so this may not be 2.6.19 material. But we are thrashing
    > > things so much it may make sense to include it, and it likely to keeps
    > > us from running into problems, so it can be called a bug preventative :)
    > >...
    >
    > Is this patch intended as fix for the 2.6.19-rc regression described
    > in [1]?

    No, that regression is fixed by the two x86-64 patches Eric sent in
    http://marc.theaimsgroup.com/?t=116157840300001&r=1&w=2.

    Cheers,
    Muli
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