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Re: [Patch v2 0/6] migration/postcopy: enable compress during postcopy
From: |
Wei Yang |
Subject: |
Re: [Patch v2 0/6] migration/postcopy: enable compress during postcopy |
Date: |
Mon, 16 Dec 2019 10:35:02 +0800 |
User-agent: |
Mutt/1.9.4 (2018-02-28) |
Would this one be picked up in this version?
On Thu, Nov 07, 2019 at 08:39:01PM +0800, Wei Yang wrote:
>This patch set tries enable compress during postcopy.
>
>postcopy requires to place a whole host page, while migration thread migrate
>memory in target page size. This makes postcopy need to collect all target
>pages in one host page before placing via userfaultfd.
>
>To enable compress during postcopy, there are two problems to solve:
>
> 1. Random order for target page arrival
> 2. Target pages in one host page arrives without interrupt by target
> page from other host page
>
>The first one is handled by counting the number of target pages arrived
>instead of the last target page arrived.
>
>The second one is handled by:
>
> 1. Flush compress thread for each host page
> 2. Wait for decompress thread for before placing host page
>
>With the combination of these two changes, compress is enabled during
>postcopy.
>
>---
>v2:
> * use uintptr_t to calculate place_dest
> * check target pages belongs to the same host page
>
>Wei Yang (6):
> migration/postcopy: reduce memset when it is zero page and
> matches_target_page_size
> migration/postcopy: wait for decompress thread in precopy
> migration/postcopy: count target page number to decide the
> place_needed
> migration/postcopy: set all_zero to true on the first target page
> migration/postcopy: enable random order target page arrival
> migration/postcopy: enable compress during postcopy
>
> migration/migration.c | 11 -------
> migration/ram.c | 67 +++++++++++++++++++++++++++++++++----------
> 2 files changed, 52 insertions(+), 26 deletions(-)
>
>--
>2.17.1
--
Wei Yang
Help you, Help me
- Re: [Patch v2 0/6] migration/postcopy: enable compress during postcopy,
Wei Yang <=