c8bb23cbdb
If COW areas of the newly allocated clusters are zeroes on the backing image, efficient bdrv_write_zeroes(flags=BDRV_REQ_NO_FALLBACK) can be used on the whole cluster instead of writing explicit zero buffers later in perform_cow(). iotest 060: write to the discarded cluster does not trigger COW anymore. Use a backing image instead. Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Message-id: 20190516142749.81019-2-anton.nefedov@virtuozzo.com Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Max Reitz <mreitz@redhat.com> |
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| .. | ||
| audio.json | ||
| authz.json | ||
| block-core.json | ||
| block.json | ||
| char.json | ||
| common.json | ||
| crypto.json | ||
| introspect.json | ||
| job.json | ||
| Makefile.objs | ||
| migration.json | ||
| misc.json | ||
| net.json | ||
| opts-visitor.c | ||
| qapi-clone-visitor.c | ||
| qapi-dealloc-visitor.c | ||
| qapi-schema.json | ||
| qapi-util.c | ||
| qapi-visit-core.c | ||
| qmp-dispatch.c | ||
| qmp-event.c | ||
| qmp-registry.c | ||
| qobject-input-visitor.c | ||
| qobject-output-visitor.c | ||
| rdma.json | ||
| rocker.json | ||
| run-state.json | ||
| sockets.json | ||
| string-input-visitor.c | ||
| string-output-visitor.c | ||
| target.json | ||
| tpm.json | ||
| trace-events | ||
| trace.json | ||
| transaction.json | ||
| ui.json | ||