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    SubjectRe: [PATCH 0/8] sdhci: Move real work out of an atomic context
    On Wed, 14 Jul 2010 17:07:28 +0400
    Anton Vorontsov <avorontsov@mvista.com> wrote:

    > Hi all,
    >
    > Currently the sdhci driver does everything in the atomic context.
    > And what is worse, PIO transfers are made from the IRQ handler.
    >
    > This causes huge latencies (up to 120 ms). On some P2020 SOCs,
    > DMA and card detection is broken, which means that kernel polls
    > for the card via PIO transfers every second. Needless to say
    > that this is quite bad.
    >
    > So, this patch set reworks sdhci code to avoid atomic context,
    > almost completely. We only do two device memory operations
    > in the atomic context, and all the rest is threaded.
    >
    > I noticed no throughput drop neither with PIO transfers nor
    > with DMA (tested on MPC8569E CPU), while latencies should be
    > greatly improved.
    >

    This patchset isn't causing any problems yet, but may do so in the
    future and will impact the validity of any testing. It seems to be
    kind of stuck. Should I drop it all?



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