Re: [PATCH 0/5] xen: cleanup detection of non-essential pv devices
On 11/22/21 3:20 AM, Juergen Gross wrote: On 22.10.21 08:47, Juergen Gross wrote: Today the non-essential pv devices are hard coded in the xenbus driver and this list is lacking multiple entries. This series reworks the detection logic of non-essential devices by adding a flag for that purpose to struct xenbus_driver. Juergen Gross (5): xen: add "not_essential" flag to struct xenbus_driver xen: flag xen_drm_front to be not essential for system boot xen: flag hvc_xen to be not essential for system boot xen: flag pvcalls-front to be not essential for system boot xen: flag xen_snd_front to be not essential for system boot drivers/gpu/drm/xen/xen_drm_front.c | 1 + drivers/input/misc/xen-kbdfront.c | 1 + drivers/tty/hvc/hvc_xen.c | 1 + drivers/video/fbdev/xen-fbfront.c | 1 + drivers/xen/pvcalls-front.c | 1 + drivers/xen/xenbus/xenbus_probe_frontend.c | 14 +++--- include/xen/xenbus.h | 1 + sound/xen/xen_snd_front.c | 1 + 8 files changed, 10 insertions(+), 11 deletions(-) Applied to for-linus-5.16c -boris
Re: [PATCH 0/5] xen: cleanup detection of non-essential pv devices
On 11/22/21 3:20 AM, Juergen Gross wrote: On 22.10.21 08:47, Juergen Gross wrote: Today the non-essential pv devices are hard coded in the xenbus driver and this list is lacking multiple entries. This series reworks the detection logic of non-essential devices by adding a flag for that purpose to struct xenbus_driver. Juergen Gross (5): xen: add "not_essential" flag to struct xenbus_driver xen: flag xen_drm_front to be not essential for system boot xen: flag hvc_xen to be not essential for system boot xen: flag pvcalls-front to be not essential for system boot xen: flag xen_snd_front to be not essential for system boot drivers/gpu/drm/xen/xen_drm_front.c | 1 + drivers/input/misc/xen-kbdfront.c | 1 + drivers/tty/hvc/hvc_xen.c | 1 + drivers/video/fbdev/xen-fbfront.c | 1 + drivers/xen/pvcalls-front.c | 1 + drivers/xen/xenbus/xenbus_probe_frontend.c | 14 +++--- include/xen/xenbus.h | 1 + sound/xen/xen_snd_front.c | 1 + 8 files changed, 10 insertions(+), 11 deletions(-) Any further comments? Reviewed-by: Boris Ostrovsky (I'll fix the semicolon typo in the last patch, no need to resend)
Re: [PATCH 0/5] xen: cleanup detection of non-essential pv devices
On 22.10.21 09:24, Jan Beulich wrote: On 22.10.2021 08:47, Juergen Gross wrote: Today the non-essential pv devices are hard coded in the xenbus driver and this list is lacking multiple entries. This series reworks the detection logic of non-essential devices by adding a flag for that purpose to struct xenbus_driver. I'm wondering whether it wouldn't better be the other way around: The (hopefully few) essential ones get flagged, thus also making it more prominent during patch review that a flag gets added (and justification provided), instead of having to spot the lack of a flag getting set. Not flagging a non-essential one is less problematic than not flagging an essential driver IMO. For some drivers I'm on the edge, BTW. The pv 9pfs driver ought to be non-essential in most cases, but there might be use cases where it is needed, so I didn't set its non_essential flag. Same applies to pv-usb and maybe pv-scsi, while pv-tpm probably really is essential. With the current series I'm ending up with 6 non-essential drivers and 6 essential ones, so either way needs the same number of drivers modified. Juergen OpenPGP_0xB0DE9DD628BF132F.asc Description: OpenPGP public key OpenPGP_signature Description: OpenPGP digital signature
Re: [PATCH 0/5] xen: cleanup detection of non-essential pv devices
On 22.10.2021 08:47, Juergen Gross wrote: > Today the non-essential pv devices are hard coded in the xenbus driver > and this list is lacking multiple entries. > > This series reworks the detection logic of non-essential devices by > adding a flag for that purpose to struct xenbus_driver. I'm wondering whether it wouldn't better be the other way around: The (hopefully few) essential ones get flagged, thus also making it more prominent during patch review that a flag gets added (and justification provided), instead of having to spot the lack of a flag getting set. Jan
[PATCH 0/5] xen: cleanup detection of non-essential pv devices
Today the non-essential pv devices are hard coded in the xenbus driver and this list is lacking multiple entries. This series reworks the detection logic of non-essential devices by adding a flag for that purpose to struct xenbus_driver. Juergen Gross (5): xen: add "not_essential" flag to struct xenbus_driver xen: flag xen_drm_front to be not essential for system boot xen: flag hvc_xen to be not essential for system boot xen: flag pvcalls-front to be not essential for system boot xen: flag xen_snd_front to be not essential for system boot drivers/gpu/drm/xen/xen_drm_front.c| 1 + drivers/input/misc/xen-kbdfront.c | 1 + drivers/tty/hvc/hvc_xen.c | 1 + drivers/video/fbdev/xen-fbfront.c | 1 + drivers/xen/pvcalls-front.c| 1 + drivers/xen/xenbus/xenbus_probe_frontend.c | 14 +++--- include/xen/xenbus.h | 1 + sound/xen/xen_snd_front.c | 1 + 8 files changed, 10 insertions(+), 11 deletions(-) -- 2.26.2
