Re: [PATCH v3 4/4] arm64: mte: Optimize mte_assign_mem_tag_range()
From: Vincenzo Frascino <vincenzo.frascino@arm.com>
Date: 2021-01-17 12:27:56
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From: Vincenzo Frascino <vincenzo.frascino@arm.com>
Date: 2021-01-17 12:27:56
Also in:
lkml
Hi Mark, On 1/16/21 2:22 PM, Vincenzo Frascino wrote:
quoted
Is there any chance that this can be used for the last bytes of the virtual address space? This might need to change to `_addr == _end` if that is possible, otherwise it'll terminate early in that case.Theoretically it is a possibility. I will change the condition and add a note for that.
I was thinking to the end of the virtual address space scenario and I forgot that if I use a condition like `_addr == _end` the tagging operation overflows to the first granule of the next allocation. This disrupts tagging accesses for that memory area hence I think that `_addr < _end` is the way to go. -- Regards, Vincenzo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel