Juan Quintela 7b24d32634 migration: skipped field is really obsolete. ... Has return zero for more than 10 years. Specifically we introduced the field in 1.5.0 commit f1c72795af Author: Peter Lieven <pl@kamp.de> Date: Tue Mar 26 10:58:37 2013 +0100 migration: do not sent zero pages in bulk stage during bulk stage of ram migration if a page is a zero page do not send it at all. the memory at the destination reads as zero anyway. even if there is an madvise with QEMU_MADV_DONTNEED at the target upon receipt of a zero page I have observed that the target starts swapping if the memory is overcommitted. it seems that the pages are dropped asynchronously. this patch also updates QMP to return the number of skipped pages in MigrationStats. but removed its usage in 1.5.3 commit 9ef051e553 Author: Peter Lieven <pl@kamp.de> Date: Mon Jun 10 12:14:19 2013 +0200 Revert "migration: do not sent zero pages in bulk stage" Not sending zero pages breaks migration if a page is zero at the source but not at the destination. This can e.g. happen if different BIOS versions are used at source and destination. It has also been reported that migration on pseries is completely broken with this patch. This effectively reverts commit f1c72795af. Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-ID: <20230612193344.3796-2-quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>		2023-07-26 10:55:56 +02:00
..
build-platforms.rst	Python: Drop support for Python 3.6	2023-05-18 08:53:51 +02:00
deprecated.rst	migration: skipped field is really obsolete.	2023-07-26 10:55:56 +02:00
emulation.rst	docs/about/emulation: fix typo	2023-05-16 09:14:18 +02:00
index.rst	docs: add a new section to outline emulation support	2023-02-02 10:44:23 +00:00
license.rst	docs: Move deprecation, build and license info out of system/	2021-07-18 10:59:47 +01:00
removed-features.rst	virtiofsd: Swing deprecated message to removed-features	2023-02-16 18:15:08 +00:00