lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 24 Jul 2014 04:38:01 +0400
From:	Max Filippov <>
To:	Andrew Morton <>
Cc:	"" <>,
	Linux-Arch <>,
	"Linux/MIPS Mailing List" <>,
	"" <>,
	LKML <>,
	Leonid Yegoshin <>,
	Chris Zankel <>,
	Marc Gauthier <>
Subject: Re: [PATCH v2] mm/highmem: make kmap cache coloring aware

Hi Andrew,

thanks for your feedback, I'll address your points in the next version of this

On Thu, Jul 24, 2014 at 1:17 AM, Andrew Morton
<> wrote:
> Fifthly, it would be very useful to publish the performance testing
> results for at least one architecture so that we can determine the
> patchset's desirability.  And perhaps to motivate other architectures
> to implement this.

What sort of performance numbers would be relevant?
For xtensa this patch enables highmem use for cores with aliasing cache,
that is access to a gigabyte of memory (typical on KC705 FPGA board) vs.
only 128MBytes of low memory, which is highly desirable. But performance
comparison of these two configurations seems to make little sense.
OTOH performance comparison of highmem variants with and without
cache aliasing would show the quality of our cache flushing code.

-- Max
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists