Hi,
I am seeing a large discrepancy between host and guest disk bandwidth when
using virtio-blk.
I would love some insight into the best ways to tune virtio-blk for maximum
bandwidth.
For context, the hypervisor is connecting to - remote NVMe/oF TCP target
over a 200 Gbps NIC. On the host I am
Hi,
I am experiencing an issue where my qemu virtual machine crashes when:
“cat /proc//maps | wc -l” is greater that “cat
/proc/sys/vm/max_map_count”
By default, the max_map_count is 65536 on my system. I am not confident
that raising this limit will resolve the issue as the number of memory
/juan.quintela/qemu.git
tags/migration-20230505-pull-request
for you to fetch changes up to fae4009fb51b12927165667a9c9d6af93d31b1df:
qemu-file: Make ram_control_save_page() use accessors for rate_limit
(2023-05-05 02:01:59 +0200
On Fri, May 05, 2023 at 03:46:52PM +0200, Fiona Ebner wrote:
> To fix it, ensure that the BQL is held during setup. To avoid changing
> the behavior for migration too, introduce conditionals for the setup
> callbacks that need the BQL and only take the lock if it's not already
> held.
The major
In spirit, this is a partial revert of commit 9b09503752 ("migration:
run setup callbacks out of big lock"), but only for the snapshot case.
For snapshots, the bdrv_writev_vmstate() function is used during setup
(in QIOChannelBlock backing the QEMUFile), but not holding the BQL
while calling it
This is a follow up on a very old thread[1]. My aim is to attach/detatch nvme
devices during runtime and test the Linux nvme subsystem in the guest.
In order to it working, I had first to add hotplug able PCI bus and the
nvme-subsystem. The nvme-subsystem can't be instatiated during runtime so
Support attaching/detaching namespaces during runtime.
Signed-off-by: Daniel Wagner
---
hw/nvme/ctrl.c | 13 +
1 file changed, 13 insertions(+)
diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index ac24eeb5ed5a..7bddbc644cae 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -8314,6
Daniel P. Berrangé wrote:
>> >
>> > This has a slight semantic behavioural change.
>>
>> Yeap.
>>
>> See the answer to Peter. But three things came to mind:
>>
>> a - the size of the buffer is small (between 32KB and 256KB depending
>> how you count it). So we are going to call
Am 04.05.2023 um 13:57 hat Kevin Wolf geschrieben:
> This QMP handler runs in a coroutine, so it must use the corresponding
> no_co_wrappers instead.
>
> Signed-off-by: Kevin Wolf
> Reviewed-by: Eric Blake
> Reviewed-by: Stefan Hajnoczi
I just noticed that this actually fixes a reported hang
Hi,
I noticed that the bdrv_graph_co_rd_lock() and bdrv_graph_co_rd_unlock()
functions use qemu_in_main_thread() as a conditional to return early.
What high-level requirements ensure that qemu_in_main_thread() will
evaluate to the same value during locking and unlocking?
This paragraph assumes no
On Thu, May 04, 2023 at 07:22:25PM +0200, Juan Quintela wrote:
> Daniel P. Berrangé wrote:
> > On Thu, May 04, 2023 at 01:38:41PM +0200, Juan Quintela wrote:
> >> That is the moment we know we have transferred something.
> >>
> >> Signed-off-by: Juan Quintela
> >> ---
> >>
11 matches
Mail list logo