From: Juan Quintela <quintela@redhat.com>
To: Wei Yang <richardw.yang@linux.intel.com>
Cc: dgilbert@redhat.com, qemu-devel@nongnu.org
Subject: Re: [Patch v2 6/6] migration/postcopy: enable compress during postcopy
Date: Thu, 09 Jan 2020 10:44:09 +0100 [thread overview]
Message-ID: <87zhexynfa.fsf@secure.laptop> (raw)
In-Reply-To: <20191107123907.29791-7-richardw.yang@linux.intel.com> (Wei Yang's message of "Thu, 7 Nov 2019 20:39:07 +0800")
Wei Yang <richardw.yang@linux.intel.com> wrote:
> 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 previous cleanup patch.
>
> This patch handles the second one by:
>
> 1. Flush compress thread for each host page
> 2. Wait for decompress thread for before placing host page
>
> Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
next prev parent reply other threads:[~2020-01-09 9:45 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-07 12:39 [Patch v2 0/6] migration/postcopy: enable compress during postcopy Wei Yang
2019-11-07 12:39 ` [Patch v2 1/6] migration/postcopy: reduce memset when it is zero page and matches_target_page_size Wei Yang
2020-01-09 9:39 ` Juan Quintela
2019-11-07 12:39 ` [Patch v2 2/6] migration/postcopy: wait for decompress thread in precopy Wei Yang
2020-01-09 9:40 ` Juan Quintela
2019-11-07 12:39 ` [Patch v2 3/6] migration/postcopy: count target page number to decide the place_needed Wei Yang
2020-01-09 9:41 ` Juan Quintela
2019-11-07 12:39 ` [Patch v2 4/6] migration/postcopy: set all_zero to true on the first target page Wei Yang
2020-01-09 9:41 ` Juan Quintela
2019-11-07 12:39 ` [Patch v2 5/6] migration/postcopy: enable random order target page arrival Wei Yang
2019-11-07 14:30 ` Dr. David Alan Gilbert
2019-11-08 0:40 ` Wei Yang
2020-01-09 9:42 ` Juan Quintela
2019-11-07 12:39 ` [Patch v2 6/6] migration/postcopy: enable compress during postcopy Wei Yang
2020-01-09 9:44 ` Juan Quintela [this message]
2019-12-16 2:35 ` [Patch v2 0/6] " Wei Yang
2019-12-18 19:55 ` Dr. David Alan Gilbert
2020-01-06 1:29 ` Wei Yang
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