qemu-patch-raspberry4/hw/block/dataplane
Greg Kurz d0267da614 virtio-blk: Configure all host notifiers in a single MR transaction
This allows the virtio-blk-pci device to batch the setup of all its
host notifiers. This significantly improves boot time of VMs with a
high number of vCPUs, e.g. from 3m26.186s down to 0m58.023s for a
pseries machine with 384 vCPUs.

Note that memory_region_transaction_commit() must be called before
virtio_bus_cleanup_host_notifier() because the latter might close
ioeventfds that the transaction still assumes to be around when it
commits.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <20210407143501.244343-3-groug@kaod.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-05-14 10:26:18 -04:00
..
meson.build meson: convert hw/block 2020-08-21 06:30:32 -04:00
trace-events trace-events: Shorten file names in comments 2019-03-22 16:18:07 +00:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
virtio-blk.c virtio-blk: Configure all host notifiers in a single MR transaction 2021-05-14 10:26:18 -04:00
virtio-blk.h hw/block: Fix the return type 2017-12-19 09:25:28 +00:00
xen-block.c block: Separate blk_is_writable() and blk_supports_write_perm() 2021-01-27 20:45:20 +01:00
xen-block.h xen-block: support feature-large-sector-size 2019-06-24 10:42:29 +01:00