search for: hotunplugging

Changes in v2: - Remove code duplication in tcm_vhost_{hotplug,hotunplug} - Fix racing of vs_events_nr - Add flush fix patch to this series Asias He (6): tcm_vhost: Add missed lock in vhost_scsi_clear_endpoint() tcm_vhost: Introduce tcm_vhost_check_feature() tcm_vhost: Introduce tcm_vhost_check_endpoint() tcm_vhost: Fix vs->vs_endpoint checking in vhost_scsi_handle_vq() tcm_vhost:

Changes in v2: - Remove code duplication in tcm_vhost_{hotplug,hotunplug} - Fix racing of vs_events_nr - Add flush fix patch to this series Asias He (6): tcm_vhost: Add missed lock in vhost_scsi_clear_endpoint() tcm_vhost: Introduce tcm_vhost_check_feature() tcm_vhost: Introduce tcm_vhost_check_endpoint() tcm_vhost: Fix vs->vs_endpoint checking in vhost_scsi_handle_vq() tcm_vhost:

On Mon, Mar 02, 2015 at 01:35:05PM +0100, Cornelia Huck wrote: > On Mon, 2 Mar 2015 13:19:43 +0100 > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > On Mon, Mar 02, 2015 at 01:11:02PM +0100, Cornelia Huck wrote: > > > On Mon, 2 Mar 2015 12:46:57 +0100 > > > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > >

On Mon, Mar 02, 2015 at 01:35:05PM +0100, Cornelia Huck wrote: > On Mon, 2 Mar 2015 13:19:43 +0100 > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > On Mon, Mar 02, 2015 at 01:11:02PM +0100, Cornelia Huck wrote: > > > On Mon, 2 Mar 2015 12:46:57 +0100 > > > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > >

In commit 365a7150094 ([SCSI] virtio-scsi: hotplug support for virtio-scsi), hotplug support is added to virtio-scsi. This patch adds hotplug and hotunplug support to tcm_vhost. You can create or delate a LUN in targetcli to hotplug or hotplug a LUN in guest. Signed-off-by: Asias He <asias at redhat.com> --- drivers/vhost/tcm_vhost.c | 171 ++++++++++++++++++++++++++++++++++++++++++++--

In commit 365a7150094 ([SCSI] virtio-scsi: hotplug support for virtio-scsi), hotplug support is added to virtio-scsi. This patch adds hotplug and hotunplug support to tcm_vhost. You can create or delate a LUN in targetcli to hotplug or hotplug a LUN in guest. Signed-off-by: Asias He <asias at redhat.com> --- drivers/vhost/tcm_vhost.c | 171 ++++++++++++++++++++++++++++++++++++++++++++--

RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1121540 When we try to hot-unplugging a busy virtio-rng device, the device can't be removed. And the reading process in guest gets stuck. Those two patches fixed this issue by completing have_data completion and preventing invalid reading. Thanks for the help of Amit. Cc: stable at vger.kernel.org V2: reset data_avail (Amit) adjust

On Mon, Mar 02, 2015 at 01:11:02PM +0100, Cornelia Huck wrote: > On Mon, 2 Mar 2015 12:46:57 +0100 > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > On Mon, Mar 02, 2015 at 12:31:06PM +0100, Cornelia Huck wrote: > > > On Mon, 2 Mar 2015 12:13:58 +0100 > > > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > >

On Mon, Mar 02, 2015 at 01:11:02PM +0100, Cornelia Huck wrote: > On Mon, 2 Mar 2015 12:46:57 +0100 > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > On Mon, Mar 02, 2015 at 12:31:06PM +0100, Cornelia Huck wrote: > > > On Mon, 2 Mar 2015 12:13:58 +0100 > > > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > >

RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1121540 When we try to hot-unplugging a busy virtio-rng device, the device can't be removed. And the reading process in guest gets stuck. Those two patches fixed this issue by completing have_data completion and preventing invalid reading. Thanks for the help of Amit. Cc: stable at vger.kernel.org V2: reset data_avail (Amit) adjust

Asias He (2): tcm_vhost: Introduce tcm_vhost_check_feature() tcm_vhost: Add hotplug/hotunplug support drivers/vhost/tcm_vhost.c | 224 ++++++++++++++++++++++++++++++++++++++++++++-- drivers/vhost/tcm_vhost.h | 10 +++ 2 files changed, 229 insertions(+), 5 deletions(-) -- 1.8.1.4

Asias He (2): tcm_vhost: Introduce tcm_vhost_check_feature() tcm_vhost: Add hotplug/hotunplug support drivers/vhost/tcm_vhost.c | 224 ++++++++++++++++++++++++++++++++++++++++++++-- drivers/vhost/tcm_vhost.h | 10 +++ 2 files changed, 229 insertions(+), 5 deletions(-) -- 1.8.1.4

When I hotunplug a busy virtio-rng device or try to access hwrng attributes in non-smp guest, it gets stuck. My hotplug tests: | test 0: | hotunplug rng device from qemu monitor | | test 1: | guest) # dd if=/dev/hwrng of=/dev/null & | hotunplug rng device from qemu monitor | | test 2: | guest) # dd if=/dev/random of=/dev/null & | hotunplug rng device from qemu monitor | | test

When I hotunplug a busy virtio-rng device or try to access hwrng attributes in non-smp guest, it gets stuck. My hotplug tests: | test 0: | hotunplug rng device from qemu monitor | | test 1: | guest) # dd if=/dev/hwrng of=/dev/null & | hotunplug rng device from qemu monitor | | test 2: | guest) # dd if=/dev/random of=/dev/null & | hotunplug rng device from qemu monitor | | test

On Thu, Aug 15, 2019 at 11:07 AM Jerome Glisse <jglisse at redhat.com> wrote: > > On Wed, Aug 14, 2019 at 07:48:28AM -0700, Dan Williams wrote: > > On Wed, Aug 14, 2019 at 6:28 AM Jason Gunthorpe <jgg at mellanox.com> wrote: > > > > > > On Wed, Aug 14, 2019 at 09:38:54AM +0200, Christoph Hellwig wrote: > > > > On Tue, Aug 13, 2019 at 06:36:33PM

There's currently a big lock around everything, and it means that we can't query sysfs (eg /sys/devices/virtual/misc/hw_random/rng_current) while the rng is reading. This is a real problem when the rng is slow, or blocked (eg. virtio_rng with qemu's default /dev/random backend) This doesn't help (it leaves the current lock untouched), just adds a lock to protect the read function

This hotplug state will be used to remove a device without the guest cooperation. Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> --- hw/acpi_piix4.c | 5 +++++ hw/pci.h | 1 + 2 files changed, 6 insertions(+), 0 deletions(-) diff --git a/hw/acpi_piix4.c b/hw/acpi_piix4.c index 585da4e..dfd5a9d 100644 --- a/hw/acpi_piix4.c +++ b/hw/acpi_piix4.c @@ -587,6 +587,11 @@

On Mon, 2 Mar 2015 13:19:43 +0100 "Michael S. Tsirkin" <mst at redhat.com> wrote: > On Mon, Mar 02, 2015 at 01:11:02PM +0100, Cornelia Huck wrote: > > On Mon, 2 Mar 2015 12:46:57 +0100 > > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > > > On Mon, Mar 02, 2015 at 12:31:06PM +0100, Cornelia Huck wrote: > > > > On

On Mon, 2 Mar 2015 13:19:43 +0100 "Michael S. Tsirkin" <mst at redhat.com> wrote: > On Mon, Mar 02, 2015 at 01:11:02PM +0100, Cornelia Huck wrote: > > On Mon, 2 Mar 2015 12:46:57 +0100 > > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > > > On Mon, Mar 02, 2015 at 12:31:06PM +0100, Cornelia Huck wrote: > > > > On

Asias He (4): tcm_vhost: Refactor the lock nesting rule tcm_vhost: Add hotplug/hotunplug support tcm_vhost: Add ioctl to get and set events missed flag tcm_vhost: Enable VIRTIO_SCSI_F_HOTPLUG drivers/vhost/tcm_vhost.c | 262 +++++++++++++++++++++++++++++++++++++++++++--- drivers/vhost/tcm_vhost.h | 13 +++ 2 files changed, 259 insertions(+), 16 deletions(-) -- 1.8.1.4