[Linaro-mm-sig] Memory region attribute bits and multiple mappings
thomas.martitz at student.htw-berlin.de
Tue Apr 19 21:23:12 UTC 2011
Am 19.04.2011 23:11, schrieb Rebecca Schultz Zavin:
> Until recently the dma api in the kernel was doing it too. Apparently
> it's related to speculative prefetching, so as far as my understand
> goes, not an issue on Cortex-A8 where the feature isn't present.
> However, there have been a couple of cases of data corruption due to
> it on A9.
A8 and A9 are too new for us :) We deal with ARMv4-v6 mostly.
> Be aware though, it's a race condition, just because you never saw it
> doesn't mean you couldn't have.
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