Michael S. Tsirkin m...@redhat.com writes:
virtio spec 0.9.X requires DRIVER_OK to be set before
VQs are used, but some drivers use VQs before probe
function returns.
Since DRIVER_OK is set after probe, this violates the spec.
Even though under virtio 1.0 transitional devices support this
On Mon, Oct 13, 2014 at 05:22:39PM +1030, Rusty Russell wrote:
Michael S. Tsirkin m...@redhat.com writes:
virtio spec 0.9.X requires DRIVER_OK to be set before
VQs are used, but some drivers use VQs before probe
function returns.
Since DRIVER_OK is set after probe, this violates the spec.
Changes from v4:
rename virtio_enable_vqs_early() to virtio_device_ready()
Note: Rusty requested we add a BUG_ON in the virtio_ring code.
This can be done by a separate patch on top.
Good for bisectability in case BUG_ON starts triggering :)
Rusty, please review this, and
Replace duplicated code in all transports with a single wrapper in
virtio.c.
The only functional change is in virtio_mmio.c: if a buggy device sends
us an interrupt before driver is set, we previously returned IRQ_NONE,
now we return IRQ_HANDLED.
As this must not happen in practice, this does
On restore, virtio pci does the following:
+ set features
+ init vqs etc - device can be used at this point!
+ set ACKNOWLEDGE,DRIVER and DRIVER_OK status bits
This is in violation of the virtio spec, which
requires the following order:
- ACKNOWLEDGE
- DRIVER
- init vqs
- DRIVER_OK
This
This is in preparation to extending config changed event handling
in core.
Wrapping these in an API also seems to make for a cleaner code.
Signed-off-by: Michael S. Tsirkin m...@redhat.com
Reviewed-by: Cornelia Huck cornelia.h...@de.ibm.com
---
include/linux/virtio.h | 6 +
Now that virtio core ensures config changes don't
arrive during probing, drop config_enable flag
in virtio blk.
On removal, flush is now sufficient to guarantee that
no change work is queued.
This help simplify the driver, and will allow
setting DRIVER_OK earlier without losing config
change
Enable VQs early like we do for restore.
This makes it possible to drop the scan callback,
moving scanning into the probe function, and making
code simpler.
Signed-off-by: Michael S. Tsirkin m...@redhat.com
---
drivers/scsi/virtio_scsi.c | 23 +++
1 file changed, 7
Code like
vi-vq = NULL;
kfree(vi)
does not make sense.
Clean it up, use goto error labels for cleanup.
Signed-off-by: Michael S. Tsirkin m...@redhat.com
---
drivers/char/hw_random/virtio-rng.c | 15 +--
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git
We cancel event work on device removal, but an interrupt
could trigger immediately after this, and queue it
again.
To fix, set a flag.
Loosely based on patch by Paolo Bonzini
Signed-off-by: Paolo Bonzini pbonz...@redhat.com
Signed-off-by: Michael S. Tsirkin m...@redhat.com
---
From: Paolo Bonzini pbonz...@redhat.com
Michael S. Tsirkin noticed a race condition:
we reset device on freeze, but system WQ is still
running so it might try adding bufs to a VQ meanwhile.
To fix, switch to handling events from the freezable WQ.
Reported-by: Michael S. Tsirkin m...@redhat.com
virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after resume returns, virtio balloon
violated this rule by adding bufs, which causes the VQ to be used
directly within restore.
To fix, call virtio_device_ready before using VQ.
Signed-off-by: Michael S.
virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after probe returns, but virtio 9p device
adds self to channel list within probe, at which point VQ can be
used in violation of the spec.
To fix, call virtio_device_ready before using VQs.
Signed-off-by:
virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after restore returns, virtio net violated this
rule by using receive VQs within restore.
To fix, call virtio_device_ready before using VQs.
Signed-off-by: Michael S. Tsirkin m...@redhat.com
Reviewed-by:
virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after restore returns, virtio scsi violated
this rule on restore by kicking event vq within restore.
To fix, call virtio_device_ready before using event queue.
Signed-off-by: Michael S. Tsirkin
We currently kick event within virtscsi_init,
before host is fully initialized.
This can in theory confuse guest if device
consumes the buffers immediately.
To fix, move virtscsi_kick_event_all out to scan/restore.
Signed-off-by: Michael S. Tsirkin m...@redhat.com
---
virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after restore returns, virtio block violated
this rule on restore by restarting queues, which might in theory
cause the VQ to be used directly within restore.
To fix, call virtio_device_ready before using
virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after resume returns, virtio console violated this
rule by adding inbufs, which causes the VQ to be used directly within
restore.
To fix, call virtio_device_ready before using VQs.
Signed-off-by: Michael S.
virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after probe returns, virtio console violated this
rule by adding inbufs, which causes the VQ to be used directly within
probe.
To fix, call virtio_device_ready before using VQs.
Signed-off-by: Michael S.
virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after probe returns, virtio block violated this
rule by calling add_disk, which causes the VQ to be used directly within
probe.
To fix, call virtio_device_ready before using VQs.
Signed-off-by: Michael S.
goto done;
done:
return;
is ugly, it was put there to make diff review easier.
replace by open-coded return.
Signed-off-by: Michael S. Tsirkin m...@redhat.com
Acked-by: Cornelia Huck cornelia.h...@de.ibm.com
---
drivers/net/virtio_net.c | 6 ++
1 file changed, 2
config_mutex served two purposes: prevent multiple concurrent config
change handlers, and synchronize access to config_enable flag.
Since commit dbf2576e37da0fcc7aacbfbb9fd5d3de7888a3c1
workqueue: make all workqueues non-reentrant
all workqueues are non-reentrant, and config_enable
is now
virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after probe returns, virtio net violated this
rule by using receive VQs within probe.
To fix, call virtio_device_ready before using VQs.
Signed-off-by: Michael S. Tsirkin m...@redhat.com
Reviewed-by:
config_mutex served two purposes: prevent multiple concurrent config
change handlers, and synchronize access to config_enable flag.
Since commit dbf2576e37da0fcc7aacbfbb9fd5d3de7888a3c1
workqueue: make all workqueues non-reentrant
all workqueues are non-reentrant, and config_enable
is now
On 10/9/2014 8:14 AM, Jayamohan.K wrote:
SNIP
Hi Minh and Jayamohan,
So I agree that we would want to take device capabilities into account
here, but we need to be able to adjust scsi_cmds_max (can_queue) in case
the max wqe supported is lower than scsi_cmds_max *
On 10/7/2014 3:51 PM, Bart Van Assche wrote:
On 09/23/14 18:32, Sagi Grimberg wrote:
Since you don't seem to negotiate/declare multichannel with the target,
did you test this code with some target implementations other than SCST
that happen to be out there?
(replying to an e-mail of two weeks
On 10/13/14 10:17, Sagi Grimberg wrote:
On 10/7/2014 3:51 PM, Bart Van Assche wrote:
On 09/23/14 18:32, Sagi Grimberg wrote:
Since you don't seem to negotiate/declare multichannel with the target,
did you test this code with some target implementations other than SCST
that happen to be out
Use dma_set_mask_and_coherent() to set both the DMA and coherent
DMA mask.
Signed-off-by: Anton Blanchard an...@samba.org
---
drivers/scsi/ipr.c | 11 ++-
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 3aa28bd..15f4575 100644
On 10/11/14 18:11, Christoph Hellwig wrote:
Hi Robert,
can you take a look at the patches at:
http://git.infradead.org/users/hch/scsi.git/shortlog/refs/heads/scsi-ioctl
and confirm if they fix your issue?
Hello Christoph,
At least to me patches 1/4..3/4 look like nice cleanup patches.
On 10/11/14 13:08, Christoph Hellwig wrote:
+static inline u32 blk_mq_build_unique_tag(int hwq, int tag)
+{
+ return (hwq BLK_MQ_UNIQUE_TAG_BITS) | (tag BLK_MQ_UNIQUE_TAG_MASK);
+}
Is there any value in having this as a separate helper?
Hello Christoph,
With the approach for block
On 10/11/14 13:11, Christoph Hellwig wrote:
On Wed, Oct 08, 2014 at 03:21:56PM +0200, Bart Van Assche wrote:
On 10/07/14 16:37, Jens Axboe wrote:
Lets do this separate, as explained last time, it needs to be evaluated
on its own and doesn't really belong in this series of patches.
Hello
On Mon, Oct 13, 2014 at 11:21:54AM +0200, Bart Van Assche wrote:
With the approach for block layer tag management proposed in this patch
series SCSI LLDs no longer need to call this function. This means that the
blk_mq_build_unique_tag() function can be eliminated by inlining it into
On Mon, Oct 13, 2014 at 11:15:19AM +0200, Bart Van Assche wrote:
At least to me patches 1/4..3/4 look like nice cleanup patches. Regarding
patch 4/4: I'm not sure yet what's the best way for addressing potentially
concurrent SG_SCSI_RESET ioctl calls. As far as I know many SCSI LLDs have
been
guten Tag
Ich bin über dieses Medium, um Sie über die Transaktion für den
Transfer von $ 2150 (Einundzwanzig Millionen fünfhunderttausend
US-Dollar) in meiner Bank in China, um Sie als Empfänger zu informieren.
Sie wird zu 100% sicher, dass der Finanzvorstand des verstorbenen
Currently, if you request a reset through ioctl and it fails,
the kernel escalates like it does for scsi_abort_eh_cmnd:
bus device reset -
target reset -
bus reset -
host reset
This is from scsi_error.c
On Tue, Oct 7, 2014 at 10:58 PM, Sagi Grimberg sa...@dev.mellanox.co.il
wrote:
On 10/8/2014 3:41 AM, Jay Kallickal wrote:
From: Jayamohan Kallickal jayamoh...@gmail.com
This patch allows the underlying hardware to choose
values other than hard coded max values for cqe and send_wr
while
36 matches
Mail list logo
