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Re: [Qemu-devel] [PATCH v3 07/15] vfio: Report warnings with warn_report
From: |
Markus Armbruster |
Subject: |
Re: [Qemu-devel] [PATCH v3 07/15] vfio: Report warnings with warn_report(), not error_printf() |
Date: |
Thu, 18 Apr 2019 08:18:56 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) |
Alex Williamson <address@hidden> writes:
> On Wed, 17 Apr 2019 21:06:33 +0200
> Markus Armbruster <address@hidden> wrote:
>
>> Cc: Alex Williamson <address@hidden>
>> Signed-off-by: Markus Armbruster <address@hidden>
>> ---
>> hw/vfio/pci.c | 19 +++++++++++++------
>> 1 file changed, 13 insertions(+), 6 deletions(-)
>>
>> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
>> index 504019c458..0142819ea6 100644
>> --- a/hw/vfio/pci.c
>> +++ b/hw/vfio/pci.c
>> @@ -947,8 +947,10 @@ static void vfio_pci_size_rom(VFIOPCIDevice *vdev)
>> if (vdev->pdev.romfile || !vdev->pdev.rom_bar) {
>> /* Since pci handles romfile, just print a message and return */
>> if (vfio_blacklist_opt_rom(vdev) && vdev->pdev.romfile) {
>> - error_printf("Warning : Device at %s is known to cause system
>> instability issues during option rom execution. Proceeding anyway since user
>> specified romfile\n",
>> - vdev->vbasedev.name);
>> + warn_report("Device at %s is known to cause system instability"
>> + " issues during option rom execution",
>> + vdev->vbasedev.name);
>> + error_printf("Proceeding anyway since user specified
>> romfile\n");
>
> I'm confused, the original warning is "this device is know to have
> issues, proceeding because you asked me to". Are we categorizing the
> first half as a warning and the latter as random uncategorized error
> spew? Did an automated script chunk it this way because of the period
> and strict application of the "single phrase" specification of
> warn_report()? If this is the recommended semantics, I'm not sure how
> I'd know to generate this myself for similar situations. Should we
> instead try to express this in something acceptable as a single
> phrase? Thanks,
This is an instance of the following error reporting pattern:
concise error / warning message (one line, single phrase)
additional information (free format)
We use error_report() / warn_report() for the former (this adds
decorations to the message), and error_printf() for the latter.
"git-grep -w error_printf" will lead you to other instances. Recommend
to look with this series applied, because it removes misuses of
error_printf().
Particularly relevant instances are error_report_err() and
warn_report_err(): these print the error proper with error_report() /
warn_report_err(), and the hint, if any, with error_printf().
Clearer now?
- [Qemu-devel] [PATCH v3 12/15] blockdev: Make -drive format=help print to stdout, (continued)
- [Qemu-devel] [PATCH v3 12/15] blockdev: Make -drive format=help print to stdout, Markus Armbruster, 2019/04/17
- [Qemu-devel] [PATCH v3 08/15] s390x/kvm: Report warnings with warn_report(), not error_printf(), Markus Armbruster, 2019/04/17
- [Qemu-devel] [PATCH v3 15/15] monitor: Simplify how -device/device_add print help, Markus Armbruster, 2019/04/17
- [Qemu-devel] [PATCH v3 10/15] monitor error: Make printf()-like functions return a value, Markus Armbruster, 2019/04/17
- [Qemu-devel] [PATCH v3 03/15] loader-fit: Wean off error_printf(), Markus Armbruster, 2019/04/17
- [Qemu-devel] [PATCH v3 02/15] block/ssh: Do not report read/write/flush errors to the user, Markus Armbruster, 2019/04/17
- [Qemu-devel] [PATCH v3 11/15] qemu-print: New qemu_printf(), qemu_vprintf() etc., Markus Armbruster, 2019/04/17
- [Qemu-devel] [PATCH v3 13/15] char: Make -chardev help print to stdout, Markus Armbruster, 2019/04/17
- [Qemu-devel] [PATCH v3 07/15] vfio: Report warnings with warn_report(), not error_printf(), Markus Armbruster, 2019/04/17