similar to: [Qemu-devel] virtio-console downgrade the virtio-pci-blk performance

On Tue, Sep 03, 2019 at 10:05:02AM +0200, Miklos Szeredi wrote: > [Cc: virtualization at lists.linux-foundation.org, "Michael S. Tsirkin" > <mst at redhat.com>, Jason Wang <jasowang at redhat.com>] > > It'd be nice to have an ACK for this from the virtio maintainers. > > Thanks, > Miklos Can the patches themselves be posted to the relevant list(s)

On Tue, Sep 03, 2019 at 10:05:02AM +0200, Miklos Szeredi wrote: > [Cc: virtualization at lists.linux-foundation.org, "Michael S. Tsirkin" > <mst at redhat.com>, Jason Wang <jasowang at redhat.com>] > > It'd be nice to have an ACK for this from the virtio maintainers. > > Thanks, > Miklos Can the patches themselves be posted to the relevant list(s)

Hello. Sorry for writing to btrfs mailing list, but personal mail reject my message. Saying " <chris.mason@fusionio.com>: host 10.101.1.19[10.101.1.19] said: 554 5.4.6 Hop count exceeded - possible mail loop (in reply to end of DATA command) Final-Recipient: rfc822; chris.mason@fusionio.com Action: failed Status: 5.0.0 Diagnostic-Code: X-Spam-&-Virus-Firewall; host

On 10/14/19 3:12 AM, Li Feng wrote: > Hi Cole & Michal, > > I'm sorry for my late response, I just end my journey today. > Thank your response, your suggestion is very helpful to me. > > I have added Michal in this mail, Michal helps me review my initial patchset. > (https://www.spinics.net/linux/fedora/libvir/msg191339.html) > Whoops I missed that posting, I

Sorry for the late reply, and thanks Jano for pointing out elsewhere that this didn't receive a response. On 8/12/19 5:56 AM, Li Feng wrote: > Hi Guys, > > And I want to add the vhost-user-scsi-pci/vhost-user-blk-pci support > for libvirt. > > The usage in qemu like this: > > Vhost-SCSI > -chardev socket,id=char0,path=/var/tmp/vhost.0 > -device

Hi David, Thanks for your reply. > Hmm, so this "async" (sync=disabled?) ZFS tunable means that it > completely ignores O_SYNC and O_DIRECT and runs the entire workload in > RAM? I know nothing about ZFS, but that sounds like a mighty dangerous > setting for production deployments. Yes, you are correct - sync writes will flush to RAM, just like async, will stay in RAM for

Cole Robinson <crobinso@redhat.com> 于2019年10月15日周二 上午1:48写道： > > On 10/14/19 3:12 AM, Li Feng wrote: > > Hi Cole & Michal, > > > > I'm sorry for my late response, I just end my journey today. > > Thank your response, your suggestion is very helpful to me. > > > > I have added Michal in this mail, Michal helps me review my initial patchset.

Hi Dongyang, Yan, When testing BTRFS with RAID 0 metadata on linux-3.3, we see discard ranges exceeding the end of the block device [1], potentially causing dataloss; when this occurs, filesystem writeback becomes catatonic due to continual resubmission. The reproducer is quite simple [2]. Hope this proves useful... Thanks, Daniel --- [1] attempt to access beyond end of device ram0: rw=129,

Hi Guys, And I want to add the vhost-user-scsi-pci/vhost-user-blk-pci support for libvirt. The usage in qemu like this: Vhost-SCSI -chardev socket,id=char0,path=/var/tmp/vhost.0 -device vhost-user-scsi-pci,id=scsi0,chardev=char0 Vhost-BLK -chardev socket,id=char1,path=/var/tmp/vhost.1 -device vhost-user-blk-pci,id=blk0,chardev=char1 What type should I add for libvirt. Type1: <hostdev

Hi, On Fri, 19 Jul 2019 23:26:55 +0000, douxevip wrote: > So to summarize, this is the situation: > > 1) I run a fio benchmark requesting, small, random, async writes. Command is "fio --direct=1 --sync=0 --rw=randwrite --bs=4K --numjobs=1 --iodepth=1 --runtime=60 --group_reporting --name=sambatest --size=32k --time_based". I run this command on both the host, as on the Samba

Hi David, > You're still using direct I/O with fio, which will likely disallow > client side caching with oplocks/leases. Is there a way to bypass this with settings in smb.conf at all and transform all writes to async? > I'd recommend checking that your (cifs.ko?) client is using a relatively > modern SMB2+ dialect and that leases are enabled on both sides. Yes, I

Hi, On Thu, 18 Jul 2019 19:04:47 +0000, douxevip via samba wrote: > Hi, > > I have a ZFS dataset that has sync writes disabled (setting sync=disabled) which means that it will only do async writes, and sync requests get converted to async writes. The ZFS dataset is hosted on a single Samsung 840 Pro 512GB SATA SSD. > I have this same dataset served as a Samba share, using Proxmox VE

Hi Cole & Michal, I'm sorry for my late response, I just end my journey today. Thank your response, your suggestion is very helpful to me. I have added Michal in this mail, Michal helps me review my initial patchset. (https://www.spinics.net/linux/fedora/libvir/msg191339.html) All concern about this feature is the XML design. My original XML design exposes more details of Qemu.

Hi, I have a ZFS dataset that has sync writes disabled (setting sync=disabled) which means that it will only do async writes, and sync requests get converted to async writes. The ZFS dataset is hosted on a single Samsung 840 Pro 512GB SATA SSD. I have this same dataset served as a Samba share, using Proxmox VE 6. Samba version 4.9.5-Debian (Buster), protocol SMB3_11. Kernel version 5.0.15. To

Excellent description, thank you. With performance.write-behind-trickling-writes ON (default): ## 4k randwrite # fio --randrepeat=1 --ioengine=libaio --gtod_reduce=1 --name=test --filename=test --bs=4k --iodepth=32 --size=256MB --readwrite=randwrite test: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=32 fio-3.1 Starting 1 process Jobs: 1

On 2014-06-25 20:08, Ming Lei wrote: > Hi, > > These patches try to support multi virtual queues(multi-vq) in one > virtio-blk device, and maps each virtual queue(vq) to blk-mq's > hardware queue. > > With this approach, both scalability and performance on virtio-blk > device can get improved. > > For verifying the improvement, I implements virtio-blk multi-vq

Forwarded to centos mailing list -----Original Messages----- From: wuzhouhui <wuzhouhui14 at mails.ucas.ac.cn> Sent Time: 2018-10-30 14:06:00 (Tuesday) To: "storage performance development kit" <spdk at lists.01.org> Cc: centos at centos.org, qemu-discuss at nongnu.org Subject: Re: [SPDK] VM boot failed sometimes if using vhost-user-blk with spdk I enable debug of

On Thu, Jun 26, 2014 at 5:41 PM, Ming Lei <ming.lei at canonical.com> wrote: > Hi, > > These patches try to support multi virtual queues(multi-vq) in one > virtio-blk device, and maps each virtual queue(vq) to blk-mq's > hardware queue. > > With this approach, both scalability and performance on virtio-blk > device can get improved. > > For verifying the

On 2014-06-30 19:36, Ming Lei wrote: > Hi Jens and Rusty, > > On Thu, Jun 26, 2014 at 8:04 PM, Ming Lei <ming.lei at canonical.com> wrote: >> On Thu, Jun 26, 2014 at 5:41 PM, Ming Lei <ming.lei at canonical.com> wrote: >>> Hi, >>> >>> These patches try to support multi virtual queues(multi-vq) in one >>> virtio-blk device, and maps

Hi Jens and Rusty, On Thu, Jun 26, 2014 at 8:04 PM, Ming Lei <ming.lei at canonical.com> wrote: > On Thu, Jun 26, 2014 at 5:41 PM, Ming Lei <ming.lei at canonical.com> wrote: >> Hi, >> >> These patches try to support multi virtual queues(multi-vq) in one >> virtio-blk device, and maps each virtual queue(vq) to blk-mq's >> hardware queue. >>