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| author | Steve Sistare <steven.sistare@oracle.com> | 2025-02-27 06:48:01 -0800 |
|---|---|---|
| committer | Fabiano Rosas <farosas@suse.de> | 2025-03-10 12:09:24 -0300 |
| commit | 094a3dbc55df1bbd2169eaf784cb75b594a72941 (patch) | |
| tree | a69d66ac646d68ba84400fbe178ca6e5ae62f909 /include/exec | |
| parent | d657a14de5d597bbfe7b54e4c4f0646f440e98ad (diff) | |
| download | qemu-094a3dbc55df1bbd2169eaf784cb75b594a72941.zip qemu-094a3dbc55df1bbd2169eaf784cb75b594a72941.tar.gz qemu-094a3dbc55df1bbd2169eaf784cb75b594a72941.tar.bz2 | |
migration: ram block cpr blockers
Unlike cpr-reboot mode, cpr-transfer mode cannot save volatile ram blocks
in the migration stream file and recreate them later, because the physical
memory for the blocks is pinned and registered for vfio. Add a blocker
for volatile ram blocks.
Also add a blocker for RAM_GUEST_MEMFD. Preserving guest_memfd may be
sufficient for CPR, but it has not been tested yet.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-ID: <1740667681-257312-1-git-send-email-steven.sistare@oracle.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/memory.h | 3 | ||||
| -rw-r--r-- | include/exec/ramblock.h | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 78c4e0a..d09af58 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -3203,6 +3203,9 @@ bool ram_block_discard_is_disabled(void); */ bool ram_block_discard_is_required(void); +void ram_block_add_cpr_blocker(RAMBlock *rb, Error **errp); +void ram_block_del_cpr_blocker(RAMBlock *rb); + #endif #endif diff --git a/include/exec/ramblock.h b/include/exec/ramblock.h index 0babd10..64484cd 100644 --- a/include/exec/ramblock.h +++ b/include/exec/ramblock.h @@ -39,6 +39,7 @@ struct RAMBlock { /* RCU-enabled, writes protected by the ramlist lock */ QLIST_ENTRY(RAMBlock) next; QLIST_HEAD(, RAMBlockNotifier) ramblock_notifiers; + Error *cpr_blocker; int fd; uint64_t fd_offset; int guest_memfd; |