On 12/17/13 at 12:36am, Borislav Petkov wrote: > From: Borislav Petkov <bp@xxxxxxx> > > Currently, running SetVirtualAddressMap() and passing the physical > address of the virtual map array was working only by a lucky coincidence > because the memory was present in the EFI page table too. Until Toshi > went and booted this on a big HP box - the krealloc() manner of resizing > the memmap we're doing did allocate from such physical addresses which > were not mapped anymore and boom: > > http://lkml.kernel.org/r/1386806463.1791.295.camel@xxxxxxxxxxxxxxxx > > One way to take care of that issue is to reimplement the krealloc thing > but with pages. We start with contiguous pages of order 1, i.e. 2 pages, > and when we deplete that memory (shouldn't happen all that often but you > know firmware) we realloc the next power-of-two pages. How about firstly count the md numbers in the 1st loop, then get/roundup the total size, alloc the pages, map the mds one by one in another loop. Thanks Dave -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
