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    SubjectRe: O_DIRECT patch for processors with VIPT cache for mainline kernel (specifically arm in our case)
    2008/11/20 Nick Piggin <nickpiggin@yahoo.com.au>:
    >
    > [ ... ]
    >
    > - The page is sent to the block layer, which stores into the page. Some
    > block devices like 'brd' will potentially store via the kernel linear map
    > here, and they probably don't do enough cache flushing.

    btw., if someone is curious, here is another case of what may happen
    on VIPT systems when someone uses a "virtual" block device (like
    'brd') as, heh, a swap :-)

    http://www.linux-mips.org/archives/linux-mips/2008-11/msg00038.html


    --
    Best regards,
    Dmitry Adamushko


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