Enabling discard for the storage node allows the format drivers to discard snapshots and other things, while configuration of the format layer actually decides whether to actually discard data on request from the host.
Signed-off-by: Peter Krempa <[email protected]> --- src/qemu/qemu_block.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c index b1f495b731..6e76571796 100644 --- a/src/qemu/qemu_block.c +++ b/src/qemu/qemu_block.c @@ -1163,7 +1163,10 @@ qemuBlockStorageSourceGetBackendProps(virStorageSourcePtr src, if (qemuBlockStorageSourceGetBlockdevGetCacheProps(src, fileprops) < 0) goto cleanup; - if (virJSONValueObjectAdd(fileprops, "b:read-only", src->readonly, NULL) < 0) + if (virJSONValueObjectAdd(fileprops, + "b:read-only", src->readonly, + "s:discard", "unmap", + NULL) < 0) goto cleanup; } -- 2.16.2 -- libvir-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/libvir-list
