Re: Excessive TLB flush ranges

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, May 16 2023 at 08:37, Thomas Gleixner wrote:
> On Mon, May 15 2023 at 22:31, Russell King wrote:
>>> +	list_for_each_entry(va, list, list) {
>>> +		/* flush range by one by one 'invlpg' */
>>> +		for (addr = va->va_start; addr < va->va_end; addr += PAGE_SIZE)
>>> +			flush_tlb_one_kernel(addr);
>>
>> Isn't this just the same as:
>> 	flush_tlb_kernel_range(va->va_start, va->va_end);
>
> Indeed.

Actually not. At least not on x86 where it'd end up with 3 IPIs for that
case again, instead of having one which walks the list on each CPU.

Thanks,

        tglx




[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux