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| author | Alex Williamson <alex.williamson@redhat.com> | 2015-04-28 10:23:30 -0600 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2015-05-01 14:00:53 -0600 |
| commit | 5f55d2ae699d1756ad6132786c7f9c27dc456b66 (patch) | |
| tree | c04cd92c5ce7fa91c42d87fbd739b500bf046c51 /drivers | |
| parent | b787f68c36d49bb1d9236f403813641efa74a031 (diff) | |
| download | linux-stable-5f55d2ae699d1756ad6132786c7f9c27dc456b66.tar.gz linux-stable-5f55d2ae699d1756ad6132786c7f9c27dc456b66.tar.bz2 linux-stable-5f55d2ae699d1756ad6132786c7f9c27dc456b66.zip | |
vfio-pci: Log device requests more verbosely
Log some clues indicating whether the user is receiving device
request interfaces or not listening. This can help indicate why a
driver unbind is blocked or explain why QEMU automatically unplugged
a device from the VM.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index 69fab0fd15ae..e9851add6f4e 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -907,8 +907,14 @@ static void vfio_pci_request(void *device_data, unsigned int count) mutex_lock(&vdev->igate); if (vdev->req_trigger) { - dev_dbg(&vdev->pdev->dev, "Requesting device from user\n"); + if (!(count % 10)) + dev_notice_ratelimited(&vdev->pdev->dev, + "Relaying device request to user (#%u)\n", + count); eventfd_signal(vdev->req_trigger, 1); + } else if (count == 0) { + dev_warn(&vdev->pdev->dev, + "No device request channel registered, blocked until released by user\n"); } mutex_unlock(&vdev->igate); |