From: Peter Xu <peterx@redhat.com>
To: David Hildenbrand <david@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>,
Juan Quintela <quintela@redhat.com>,
qemu-devel@nongnu.org,
"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH v2 07/13] migration/ram: Discard RAM when growing RAM blocks after ram_postcopy_incoming_init()
Date: Mon, 24 Feb 2020 17:28:07 -0500 [thread overview]
Message-ID: <20200224222807.GD113102@xz-x1> (raw)
In-Reply-To: <20200221164204.105570-8-david@redhat.com>
On Fri, Feb 21, 2020 at 05:41:58PM +0100, David Hildenbrand wrote:
> In case we grow our RAM after ram_postcopy_incoming_init() (e.g., when
> synchronizing the RAM block state with the migration source), the resized
> part would not get discarded. Let's perform that when being notified
> about a resize while postcopy has been advised, but is not listening
> yet. With precopy, the process is as following:
>
> 1. VM created
> - RAM blocks are created
> 2. Incomming migration started
> - Postcopy is advised
> - All pages in RAM blocks are discarded
> 3. Precopy starts
> - RAM blocks are resized to match the size on the migration source.
> - RAM pages from precopy stream are loaded
> - Uffd handler is registered, postcopy starts listening
> 3. Guest started, postcopy running
> - Pagefaults get resolved, pages get placed
>
> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> Cc: Juan Quintela <quintela@redhat.com>
> Cc: Peter Xu <peterx@redhat.com>
> Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
--
Peter Xu
next prev parent reply other threads:[~2020-02-24 22:39 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-21 16:41 [PATCH v2 00/13] migrate/ram: Fix resizing RAM blocks while migrating David Hildenbrand
2020-02-21 16:41 ` [PATCH v2 01/13] util: vfio-helpers: Factor out and fix processing of existing ram blocks David Hildenbrand
2020-02-21 16:41 ` [PATCH v2 02/13] stubs/ram-block: Remove stubs that are no longer needed David Hildenbrand
2020-02-21 16:41 ` [PATCH v2 03/13] numa: Teach ram block notifiers about resizeable ram blocks David Hildenbrand
2020-02-21 16:41 ` [PATCH v2 04/13] numa: Make all callbacks of ram block notifiers optional David Hildenbrand
2020-02-21 16:41 ` [PATCH v2 05/13] migration/ram: Handle RAM block resizes during precopy David Hildenbrand
2020-02-24 22:27 ` Peter Xu
2020-02-21 16:41 ` [PATCH v2 06/13] exec: Relax range check in ram_block_discard_range() David Hildenbrand
2020-02-24 22:27 ` Peter Xu
2020-02-21 16:41 ` [PATCH v2 07/13] migration/ram: Discard RAM when growing RAM blocks after ram_postcopy_incoming_init() David Hildenbrand
2020-02-24 22:28 ` Peter Xu [this message]
2020-02-21 16:41 ` [PATCH v2 08/13] migration/ram: Simplify host page handling in ram_load_postcopy() David Hildenbrand
2020-02-21 16:42 ` [PATCH v2 09/13] migration/ram: Consolidate variable reset after placement " David Hildenbrand
2020-02-21 16:42 ` [PATCH v2 10/13] migration/ram: Handle RAM block resizes during postcopy David Hildenbrand
2020-02-24 22:26 ` Peter Xu
2020-02-25 7:28 ` David Hildenbrand
2020-02-25 16:11 ` Peter Xu
2020-02-21 16:42 ` [PATCH v2 11/13] migration/multifd: Print used_length of memory block David Hildenbrand
2020-02-21 16:42 ` [PATCH v2 12/13] migration/ram: Use offset_in_ramblock() in range checks David Hildenbrand
2020-02-21 16:42 ` [PATCH v2 13/13] migration/ram: Tolerate partially changed mappings in postcopy code David Hildenbrand
2020-02-24 22:49 ` Peter Xu
2020-02-25 7:44 ` David Hildenbrand
2020-02-25 14:27 ` Peter Xu
2020-02-25 15:37 ` Peter Xu
2020-02-21 18:04 ` [PATCH v2 00/13] migrate/ram: Fix resizing RAM blocks while migrating Peter Xu
2020-02-24 9:09 ` David Hildenbrand
2020-02-24 17:45 ` Peter Xu
2020-02-24 18:44 ` David Hildenbrand
2020-02-24 18:59 ` David Hildenbrand
2020-02-24 19:18 ` Peter Xu
2020-02-24 19:34 ` David Hildenbrand
2020-02-24 20:04 ` Peter Xu
2020-02-24 20:54 ` David Hildenbrand
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