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SubjectRe: Accessing copy_to_user() from interrupt handler?
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In linux.dev.kernel, article <qm4tii8pyj.fsf@chemie.uni-karlsruhe.de>,
Klaus-Georg Adams <Klaus-Georg.Adams@chemie.uni-karlsruhe.de> writes:
>
> This brings us back to the problem of kmalloc()ing ca. 1MB reliably. I
> prefer allocating the buffer in the ccd_open() rather than in
> module_init(). And so far there is no way to tell kmalloc() to page
> out a couple of user pages if memory is running low instead of
> failing. vmalloc() works, but then you don't want page faults when
> reading from the CCD.
>
It seems that vmalloc needs an option to actually allocate the pages it
maps (I was assuming it does that already?).

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