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    SubjectRe: [PATCHv2 00/16] [FS, MM, block, MMC]: eMMC High Priority Interrupt Feature
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    On 05/14/2012 04:43 PM, mani wrote:

    > Dear Kim,
    >
    > I have a query here ..
    >
    >
    > My point is that it would be better for read to not preempt
    > write-for-page_reclaim.
    > And we can identify it by PG_reclaim. You can get the idea.
    >
    > I think If there is no page available then no read will proceed.

    > When read request comes it reclaim the pages (starts the write if

    > syncable pages ) and get back after reclaiming the pages.
    > Only then a read request will come to the MMC subsystem.

    > And i think the reclaim algorithm will reclaim some substantial amount

    > of pages at a time instead of a single page.
    > So if we get few pages during the reclamation so there will be no
    > problem in halting the another write ops for proceeding the reads ?
    >
    > Can we think of a scenario when we are reclaiming the pages and write
    > ops is going on where as a high priority read for the interrupt handler
    > is pending ?
    >
    > Please correct me if i am wrong.


    For example, System can have lots of order-0 pages but little order-big pages.
    In this case, for getting big contiguos memory, reclaimer should write out
    dirty pages while it can handle order-0 page read request.


    >
    > Thanks & Regards
    > Manish



    --
    Kind regards,
    Minchan Kim



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