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From: Stefan Hajnoczi <stefanha@redhat.com>
To: Sergio Lopez <slp@redhat.com>
Cc: Fam Zheng <fam@euphon.net>, Kevin Wolf <kwolf@redhat.com>,
	qemu-block@nongnu.org, Markus Armbruster <armbru@redhat.com>,
	QEMU Developers <qemu-devel@nongnu.org>,
	saket.sinha89@gmail.com, Paolo Bonzini <pbonzini@redhat.com>,
	Max Reitz <mreitz@redhat.com>, Julia Suvorova <jusual@mail.ru>,
	Aarushi Mehta <mehta.aaru20@gmail.com>
Subject: Re: [Qemu-devel] [PATCH v4 0/9] Add support for io_uring
Date: Fri, 7 Jun 2019 15:46:45 +0200	[thread overview]
Message-ID: <20190607134645.GC5220@stefanha-x1.localdomain> (raw)
In-Reply-To: <878sudu0d1.fsf@redhat.com>

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On Fri, Jun 07, 2019 at 12:59:54PM +0200, Sergio Lopez wrote:
> I gave this version of the patchset a try, and found that IO hangs when
> the device is assigned to an IOThread. Sometimes is able to serve a few
> requests getting through the Guest OS boot process, to hang the moment
> you try generate some IO on the device, while others it hangs when Linux
> tries to read the partitions from the device.
> 
> I'm starting QEMU this way:
> 
> ./x86_64-softmmu/qemu-system-x86_64 -enable-kvm -name rhel80,debug-threads=on -m 2g -smp 4 -object iothread,id=iothread0 -blockdev node-name=rhel80,driver=qcow2,file.driver=file,file.filename=/home/VirtualMachines/rhel80.qcow2 -device virtio-blk,drive=rhel80 -serial tcp::6667,server,nowait -qmp tcp::6668,server,nowait -nographic -net user,hostfwd=tcp::6666-:22 -net nic,model=virtio -device virtio-rng -drive file=/dev/nullb0,format=raw,cache=none,aio=io_uring,if=none,id=test -device virtio-blk,drive=test,iothread=iothread0
> 
> Could you please take a look at this issue?

Maybe the ioq_submit() issue I mentioned solves this.

Stefan

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  reply	other threads:[~2019-06-07 13:55 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-03 12:38 [Qemu-devel] [PATCH v4 0/9] Add support for io_uring Aarushi Mehta
2019-06-03 12:38 ` [Qemu-devel] [PATCH v4 1/9] configure: permit use of io_uring Aarushi Mehta
2019-06-06 11:47   ` [Qemu-devel] [Qemu-block] " Maxim Levitsky
2019-06-03 12:38 ` [Qemu-devel] [PATCH v4 2/9] qapi/block-core: add option for io_uring Aarushi Mehta
2019-06-05  5:58   ` Markus Armbruster
2019-06-06 11:49     ` [Qemu-devel] [Qemu-block] " Maxim Levitsky
2019-06-07 12:25     ` [Qemu-devel] " Stefan Hajnoczi
2019-06-03 12:38 ` [Qemu-devel] [PATCH v4 3/9] block/block: add BDRV flag " Aarushi Mehta
2019-06-06 11:52   ` [Qemu-devel] [Qemu-block] " Maxim Levitsky
2019-06-03 12:38 ` [Qemu-devel] [PATCH v4 4/9] block/io_uring: implements interfaces " Aarushi Mehta
2019-06-07 13:45   ` Stefan Hajnoczi
2019-06-03 12:38 ` [Qemu-devel] [PATCH v4 5/9] stubs: add stubs for io_uring interface Aarushi Mehta
2019-06-03 12:38 ` [Qemu-devel] [PATCH v4 6/9] util/async: add aio interfaces for io_uring Aarushi Mehta
2019-06-03 12:38 ` [Qemu-devel] [PATCH v4 7/9] blockdev: accept io_uring as option Aarushi Mehta
2019-06-03 12:38 ` [Qemu-devel] [PATCH v4 8/9] block/file-posix.c: extend to use io_uring Aarushi Mehta
2019-06-03 12:38 ` [Qemu-devel] [PATCH v4 9/9] block: add trace events for io_uring Aarushi Mehta
2019-06-07 10:59 ` [Qemu-devel] [PATCH v4 0/9] Add support " Sergio Lopez
2019-06-07 13:46   ` Stefan Hajnoczi [this message]
2019-06-07 14:10   ` Stefan Hajnoczi
2019-06-07 14:17     ` Sergio Lopez

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