From: Prasad Pandit
Libaio defines IO_CMD_FDSYNC command to sync all outstanding
asynchronous I/O operations, by flushing out file data to the
disk storage. Enable linux-aio to submit such aio request.
When using aio=native without fdsync() support, QEMU creates
pthreads, and destroying
From: Prasad Pandit
Rearrange BRDVRawState structure fields to avoid memory
fragments in its object's memory and save some(~8) bytes
per object.
Signed-off-by: Prasad Pandit
---
block/file-posix.c | 39 +++
1 file changed, 19 insertions(+), 20 deletions
From: Prasad Pandit
Libaio defines IO_CMD_FDSYNC command to sync all outstanding
asynchronous I/O operations, by flushing out file data to the
disk storage.
Enable linux-aio to submit such aio request. This helps to
reduce latency induced via pthread_create calls by
thread-pool (aio=threads
On Wed, 13 Mar 2024 at 20:48, Stefan Hajnoczi wrote:
> > +extern bool laio_has_fdsync(int);
> Please declare this in include/block/raw-aio.h alongside the other laio APIs.
>
> FDSYNC support should be probed at open() time and the result should be
> stored in a new bool field like
From: Prasad Pandit
Libaio defines IO_CMD_FDSYNC command to sync all outstanding
asynchronous I/O operations, by flushing out file data to the
disk storage.
Enable linux-aio to submit such aio request. This helps to
reduce latency induced via pthread_create calls by
thread-pool (aio=threads
Hello,
On Tue, 12 Mar 2024 at 15:15, Kevin Wolf wrote:
> Am 11.03.2024 um 20:36 hat Stefan Hajnoczi geschrieben:
> > > > That can be avoided with a variable that keeps track of whether -EINVAL
> > > > was seen before and skips Linux AIO in that
> > > > case.
> > > >
> > > > Fallback should be
Hello Kevin,
On Fri, 8 Mar 2024 at 17:38, Prasad Pandit wrote:
> I'm trying to test it against the Fedora-26 kernel, which was < 4.13.0, and
> did not support the AIO_FDSYNC call.
[PATCH v2] ->
https://lists.nongnu.org/archive/html/qemu-devel/2024-03/msg02495.html
*
From: Prasad Pandit
Libaio defines IO_CMD_FDSYNC command to sync all outstanding
asynchronous I/O operations, by flushing out file data to the
disk storage.
Enable linux-aio to submit such aio request. This helps to
reduce latency induced via pthread_create calls by
thread-pool (aio=threads
Hello Kevin,
On Fri, 8 Mar 2024 at 14:35, Kevin Wolf wrote:
> Hm... This might make it more challenging because then not only one
> specific request fails, but the whole submission batch.
* Yes exactly.
* I've updated yesterday's patch to return an error (-EINVAL) from
ioq_submit to
Hi,
On Thu, 7 Mar 2024 at 19:21, Kevin Wolf wrote:
> Kernel support for this is "relatively" new, added in 2018. Should we
> fall back to the thread pool if we receive -EINVAL?
laio_co_submit
laio_do_submit
ioq_submit
io_submit
* When an aio operation is not supported by the
From: Prasad Pandit
Libaio defines IO_CMD_FDSYNC command to sync all outstanding
asynchronous I/O operations, by flushing out file data to the
disk storage.
Enable linux-aio to submit such aio request. This helps to
reduce latency induced via pthread_create calls by
thread-pool (aio=threads
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