[PATCH v16 00/10] KVM/arm/arm64/x86: dirty page logging for ARMv7/8 (3.18.0-rc2)

Mario Smarduch m.smarduch at samsung.com
Wed Jan 21 10:38:50 PST 2015

On 01/21/2015 03:08 AM, Christoffer Dall wrote:
> On Thu, Jan 15, 2015 at 03:58:51PM -0800, Mario Smarduch wrote:
>> Patch series adds support for armv7/8 dirty page logging. As we move
>> towards generic dirty page logging interface we move some common code to
>> generic layer shared by x86, armv7 and armv8.
>> armv7/8 Dirty page logging implementation overivew-
>> - initially write protects memory region 2nd stage page tables
>> - read dirty page log and again write protect dirty pages for next pass.
>> - second stage huge pages are dissolved into normal pages to keep track of
>>   dirty memory at page granularity. Tracking at huge page granularity
>>   limits granularity of marking dirty memory and migration to a light memory
>>   load. Small page size logging supports higher memory dirty rates, enables
>>   rapid migration.
>>   armv7 supports 2MB Huge page, and armv8 supports 2MB (4kb) and
>>   512MB (64kb)
>> - In the event migration is canceled, normal behavior is resumed huge pages
>>   are rebuilt over time.
> Thanks, applied.
> -Christoffer
Thanks! And also to other folks that helped along the way
in shaping the design and reviews.

- Mario

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