On Tue, May 10, 2022 at 01:28:38PM -0300, Arnaldo Carvalho de Melo wrote:

Em Wed, May 04, 2022 at 06:48:47PM +0000, Ali Saidi escreveu:

quoted

Add a flag to the perf mem data struct to signal that a request caused a
cache-to-cache transfer of a line from a peer of the requestor and
wasn't sourced from a lower cache level.  The line being moved from one
peer cache to another has latency and performance implications. On Arm64
Neoverse systems the data source can indicate a cache-to-cache transfer
but not if the line is dirty or clean, so instead of overloading HITM
define a new flag that indicates this type of transfer.

Signed-off-by: Ali Saidi <redacted>
Reviewed-by: Leo Yan <redacted>

Was this already merged on the ARM kernel tree?

No, I don't think this patch has been merged on Arm kernel tree.  I searched
Arm and Arm64 git repos, none of them has merged this patch.

https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?qt=author&q=Ali+Saidi
http://git.armlinux.org.uk/cgit/linux-arm.git/log/?qt=author&q=Ali+Saidi

P.s. Ali missed to include German's review tag, see:
https://lore.kernel.org/lkml/458a2de1-dc93-7e2d-5dc5-fbcd670572b6@arm.com/ (local)

Do you want us to resend the patch set for adding tags?

Thanks,
Leo

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