On 10/26/2018 11:42 AM, Daniel P. Berrangé wrote: > On Fri, Oct 26, 2018 at 12:33:55PM +0530, P J P wrote: >> Hello Dan, all >> >> +-- On Thu, 25 Oct 2018, Daniel P. Berrangé wrote --+ >> | On Thu, Oct 25, 2018 at 10:52:56AM +0200, Gerd Hoffmann wrote: >> | > While being at it deprecate cirrus too. >> | > >> | > Reason (short version): use stdvga instead. >> | > Verbose version: >> | > https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful >> | >> | >> | I don't debate the points in the blog post above that stdvga is a >> | better choice, but I don't think that's enough to justify deprecating >> | cirrus at this point in time, because when it then gets deleted it >> | will break way too many existing deployments. >> | >> | We need to socialize info in that blog post above more widely and >> | especially ensure that apps are not using that by default. I don't >> | see it being viable to formally deprecate it in QEMU any time soon >> | though given existing usage. >> >> To note, IMO there are other devices/sources in QEMU which are potential >> candidates for deprecation, similar to adlib etc. It'll help if we could >> device a process to deprecate/remove such code base. Other than maintenance it >> invariably also becomes source of security issues. >> >> Ex.(similar to Fedora) we could announce such candidate on qemu-devel list and >> after review over a period of say a month, candidate will be >> deprecated/expunged. (thinking aloud) > > QEMU has a deprecation process: > > https://qemu.weilnetz.de/doc/qemu-doc.html#Deprecated-features > > Most of the stuff deprecated is CLI args / monitor commands, etc where > mgmt apps just adjust the way they are calling QEMU, so end user's VMs > are largely not impacted. > > Deprecating a device type that is widely used is not desirable because > that will cause breakage of existing guests. Distros are free to disable > devices in their builds if they want to reduce the scope for CVEs in > packages they maintain, but again they should think carefully about how > many users they are going to break by doing so. I agree with what Daniel said. Deprecating something that is in heavy use by users just because we have trouble maintaining it not going to help the QEMU project - quite the opposite. -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
