diff options
| author | David Hildenbrand | 2021-04-13 11:55:29 +0200 |
|---|---|---|
| committer | Eduardo Habkost | 2021-07-08 21:54:45 +0200 |
| commit | 7e6d32ebf79079a88e24da3359e2427ebed5f1be (patch) | |
| tree | 83b887254852f067a7a1310a6298bae109c7d365 /include | |
| parent | softmmu/physmem: Don't use atomic operations in ram_block_discard_(disable|re... (diff) | |
| download | qemu-7e6d32ebf79079a88e24da3359e2427ebed5f1be.tar.gz qemu-7e6d32ebf79079a88e24da3359e2427ebed5f1be.tar.xz qemu-7e6d32ebf79079a88e24da3359e2427ebed5f1be.zip | |
softmmu/physmem: Extend ram_block_discard_(require|disable) by two discard types
We want to separate the two cases whereby we discard ram
- uncoordinated: e.g., virito-balloon
- coordinated: e.g., virtio-mem coordinated via the RamDiscardManager
Reviewed-by: Pankaj Gupta <pankaj.gupta@cloud.ionos.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Auger Eric <eric.auger@redhat.com>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: teawater <teawaterz@linux.alibaba.com>
Cc: Marek Kedzierski <mkedzier@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210413095531.25603-12-david@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/exec/memory.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 27a8833173..c3d417d317 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -2894,6 +2894,12 @@ static inline MemOp devend_memop(enum device_endian end) int ram_block_discard_disable(bool state); /* + * See ram_block_discard_disable(): only disable uncoordinated discards, + * keeping coordinated discards (via the RamDiscardManager) enabled. + */ +int ram_block_uncoordinated_discard_disable(bool state); + +/* * Inhibit technologies that disable discarding of pages in RAM blocks. * * Returns 0 if successful. Returns -EBUSY if discards are already set to @@ -2902,12 +2908,20 @@ int ram_block_discard_disable(bool state); int ram_block_discard_require(bool state); /* - * Test if discarding of memory in ram blocks is disabled. + * See ram_block_discard_require(): only inhibit technologies that disable + * uncoordinated discarding of pages in RAM blocks, allowing co-existance with + * technologies that only inhibit uncoordinated discards (via the + * RamDiscardManager). + */ +int ram_block_coordinated_discard_require(bool state); + +/* + * Test if any discarding of memory in ram blocks is disabled. */ bool ram_block_discard_is_disabled(void); /* - * Test if discarding of memory in ram blocks is required to work reliably. + * Test if any discarding of memory in ram blocks is required to work reliably. */ bool ram_block_discard_is_required(void); |