search for: amitshah

Add a new poll_controller handler that the netpoll interface needs. This enables netconsole logging from a kvm guest over the virtio net interface. Signed-off-by: Amit Shah <amitshah at gmx.net> --- drivers/net/virtio_net.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index fdc2367..3f3d334 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -294,6 +294,15 @@ agai...

Add a new poll_controller handler that the netpoll interface needs. This enables netconsole logging from a kvm guest over the virtio net interface. Signed-off-by: Amit Shah <amitshah at gmx.net> --- drivers/net/virtio_net.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index fdc2367..3f3d334 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -294,6 +294,15 @@ agai...

> > This patch set is the QEMU side implementation. > > > > The virtio-balloon is extended so that QEMU can get the free pages > > information from the guest through virtio. > > > > After getting the free pages information (a bitmap), QEMU can use it > > to filter out the guest's free pages in the ram bulk stage. This make > > the live migration

> > This patch set is the QEMU side implementation. > > > > The virtio-balloon is extended so that QEMU can get the free pages > > information from the guest through virtio. > > > > After getting the free pages information (a bitmap), QEMU can use it > > to filter out the guest's free pages in the ram bulk stage. This make > > the live migration

From: Anthony Liguori <aliguori at us.ibm.com> virtio-pci acquires its spin lock in an interrupt context so it's necessary to use spin_lock_irqsave/restore variants. This patch fixes guest SMP when using virtio devices in KVM. Signed-off-by: Anthony Liguori <aliguori at us.ibm.com> Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> --- drivers/virtio/virtio_pci.c |

From: Anthony Liguori <aliguori at us.ibm.com> virtio-pci acquires its spin lock in an interrupt context so it's necessary to use spin_lock_irqsave/restore variants. This patch fixes guest SMP when using virtio devices in KVM. Signed-off-by: Anthony Liguori <aliguori at us.ibm.com> Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> --- drivers/virtio/virtio_pci.c |

Turns out virtio console tries to take a buffer out of an active vq. Works by sheer luck, and is explicitly forbidden by spec. And while going over it I saw that error handling is also broken - failure is easy to trigger if I force allocations to fail. Lightly tested. Michael S. Tsirkin (6): virtio_console: don't tie bufs to a vq virtio: add ability to iterate over vqs virtio_console:

Turns out virtio console tries to take a buffer out of an active vq. Works by sheer luck, and is explicitly forbidden by spec. And while going over it I saw that error handling is also broken - failure is easy to trigger if I force allocations to fail. Lightly tested. Michael S. Tsirkin (6): virtio_console: don't tie bufs to a vq virtio: add ability to iterate over vqs virtio_console:

...see the qemu-guest-agent in the qemu sources. The API is documented in the wiki: http://www.linux-kvm.org/page/Virtio-serial_API and the feature pages have some information that may help as well: https://fedoraproject.org/wiki/Features/VirtioSerial There are some links in here too: http://log.amitshah.net/2010/09/communication-between-guests-and-hosts/ Hope this helps. Amit

...> > There are a bunch of tests in avocado-vt that test virtio-console > functionality. Can you give those a try before pushing? > > Amit I pushed before I did that test, will try to find the time later. BTW do you still want to be on the maintainers list? > -- > http://amitshah.net/

...t; Yes, I want to be on the maintainers list; but won't mind > co-maintainers. The recent changes seem to be spec-related, and I'd > expect you to have a good handle on that anyway. > > Amit If you can do extra testing that would be appreciated though. > -- > http://amitshah.net/

The get_buf() API sets the second arg to the number of bytes *written* by the other side; in this case it should be zero as these are output buffers. lguest gets this right (obviously kvm's console doesn't), resulting in continual buildup of console writes. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> To: Amit Shah <amit.shah at redhat.com> ---

The get_buf() API sets the second arg to the number of bytes *written* by the other side; in this case it should be zero as these are output buffers. lguest gets this right (obviously kvm's console doesn't), resulting in continual buildup of console writes. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> To: Amit Shah <amit.shah at redhat.com> ---

...673 76 26237 667d drivers/char/virtio_console.o > > Signed-off-by: Rikard Falkeborn <rikard.falkeborn at gmail.com> Reviewed-by: Amit Shah <amit at kernel.org> Please CC me on the entire series instead of individual patches in the future. Thanks, Amit -- http://amitshah.net/

...> > > > -- > > > Dr. David Alan Gilbert / dgilbert at redhat.com / Manchester, UK > > > > > > > > -- > > Thanks and Best Regards, > > Feng Li(Alex) > > > > -- > Thanks and Best Regards, > Feng Li(Alex) Amit -- http://amitshah.net/

...vious one. It sends a SIGIO signal to apps that request signals for host activity. SIGIO is sent on host connect, disconnect as well as hot-unplug (which can be seen as a special case of host disconnect). Tested using several testcases in the test-virtserial repo: http://fedorapeople.org/gitweb?p=amitshah/public_git/test-virtserial.git Please apply. Thanks, Amit. Amit Shah (3): virtio: console: Send SIGIO to processes that request it for host events virtio: console: Send SIGIO on new data arrival on ports virtio: console: Send SIGIO in case of port unplug drivers/char/virtio_console.c...

...vious one. It sends a SIGIO signal to apps that request signals for host activity. SIGIO is sent on host connect, disconnect as well as hot-unplug (which can be seen as a special case of host disconnect). Tested using several testcases in the test-virtserial repo: http://fedorapeople.org/gitweb?p=amitshah/public_git/test-virtserial.git Please apply. Thanks, Amit. Amit Shah (3): virtio: console: Send SIGIO to processes that request it for host events virtio: console: Send SIGIO on new data arrival on ports virtio: console: Send SIGIO in case of port unplug drivers/char/virtio_console.c...

...API is documented in the wiki: > > http://www.linux-kvm.org/page/Virtio-serial_API > > and the feature pages have some information that may help as well: > > https://fedoraproject.org/wiki/Features/VirtioSerial > > There are some links in here too: > > http://log.amitshah.net/2010/09/communication-between-guests-and- > hosts/ > > Hope this helps. > > > Amit Thanks a lot !! Liang

...API is documented in the wiki: > > http://www.linux-kvm.org/page/Virtio-serial_API > > and the feature pages have some information that may help as well: > > https://fedoraproject.org/wiki/Features/VirtioSerial > > There are some links in here too: > > http://log.amitshah.net/2010/09/communication-between-guests-and- > hosts/ > > Hope this helps. > > > Amit Thanks a lot !! Liang

...t, to be bound to hvc. This keeps new host, old guest happy. A testsuite is put up at the following site that has an interactive test program that can be run in the guest. It also has an automated test suite that tests the major functionalities presented here: http://fedorapeople.org/gitweb?p=amitshah/public_git/test-virtserial.git This version passes all the automated tests there. Christian has tested the console functionality on s390. v9: - Add debugfs files for each port to expose some port-specific information for easier debugging - Port hotplug fix - Disallow opening of console ports (...