On Mon, Jan 7, 2013 at 12:32 PM, Yinghai Lu <ying...@kernel.org> wrote: >> 2). The check for 1MB is suspect. Why only 1MB? You mentioned it is >> b/c of crashkernel_low=72M (which I am not seeing in v3.8 >> kernel-parameters.txt? >> Is that part of your mega-patchset?). Anyhow, there seems to be a >> disconnect - >> what if the user supplied crashkernel_low=27M? Perhaps the 'is_enough' >> should also parse the bootparams to double-check that there is enough >> low-mem space? But then if the kernel grows then 72M might not be >> enough - >> you might need 82M with 3.9. > > again, could with memmap= include or exclude case, so parse boot command line > is not going to handle all the case.
replace the hardcoded 1M checking, please check attached -v3. Thanks Yinghai
auto_switch_off_swiotlb_v3.patch
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