* Wei Yang (richardw.y...@linux.intel.com) wrote: > Would this one be picked up in this version?
I think that one is on Juan's list for the pull he's going to do soon. Dave > 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 > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
