CVS commit: [netbsd-9] src/sys/arch/xen/xen

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Tue Feb 23 18:50:21 UTC 2021

Modified Files:
        src/sys/arch/xen/xen [netbsd-9]: xennetback_xenbus.c

Log Message:
Pull up following revision(s) (requested by jdolecek in ticket #1211):

        sys/arch/xen/xen/xennetback_xenbus.c: revision 1.92 (via patch)

remove support for legacy rx-flip mode for xennet(4)/xvif(4), making
rx-copy (first shipped in NetBSD 6.0 in 2012) the only supported
mode

this is mostly to simplify maintenance and future development
rx-flip is not supported by Linux Dom0/DomU, and NetBSD Dom0/DomU
defaults to rx-copy for over 8 years now too, so there is little
need to keep the support for compatibility

besides compatibility there is no other reason to keep rx-flip -
page transfer is generally slower than copy due to necessary MMU/TLB
manipulation, especially on MP systems


To generate a diff of this commit:
cvs rdiff -u -r1.75 -r1.75.4.1 src/sys/arch/xen/xen/xennetback_xenbus.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.