Hey, just FYI about tmpfs, during some development on Fedora 39 I noticed
O_DIRECT is now supported on tmpfs (as opposed to our CI which runs Centos
9 Stream).
`qemu-img convert -t none -O raw tests/images/cirros-qcow2.img
/tmp/cirros.raw`
where /tmp is indeed a tmpfs.
I might be missing
On Mon, May 06, 2024 at 08:10:25PM +0300, Alex Kalenyuk wrote:
> Hey, just FYI about tmpfs, during some development on Fedora 39 I noticed
> O_DIRECT is now supported on tmpfs (as opposed to our CI which runs Centos
> 9 Stream).
> `qemu-img convert -t none -O raw tests/images/cirros-qcow2.img
>
Hi Daniel,
I agree with your points.
Stefan
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On Mon, Jul 31, 2023 at 11:40:36AM -0400, Stefan Hajnoczi wrote:
> Hi,
> qemu-img -t writeback -T writeback is not designed to run with the Linux
> cgroup v1 memory controller because dirtying too much page cache leads
> to process termination instead of usual non-cgroup and cgroup v2
> throttling
On Mon, Jul 31, 2023 at 11:40:36AM -0400, Stefan Hajnoczi wrote:
> 3. Using buffered I/O because O_DIRECT is not universally supported?
>
> If you can't use O_DIRECT, then qemu-img could be extended to manage its
> dirty page cache set carefully. This consists of picking a budget and
> writing
Hi,
qemu-img -t writeback -T writeback is not designed to run with the Linux
cgroup v1 memory controller because dirtying too much page cache leads
to process termination instead of usual non-cgroup and cgroup v2
throttling behavior:
https://bugzilla.redhat.com/show_bug.cgi?id=2196072
I wanted to
