CVS commit: src

["Ryota Ozaki" <ozaki-r%netbsd.org@localhost>]

Module Name:    src
Committed By:   ozaki-r
Date:           Tue Jan 24 09:05:28 UTC 2017

Modified Files:
        src/sys/dev/ic: hd64570.c midway.c
        src/sys/dev/pci: if_lmc.c if_lmc.h
        src/sys/net: bpf.c bpf.h bpfdesc.h
        src/sys/netisdn: i4b_ipr.c
Added Files:
        src/doc: TODO.smpnet

Log Message:
Defer bpf_mtap in Rx interrupt context to softint

bpf_mtap of some drivers is still called in hardware interrupt context.
We want to run them in softint as well as bpf_mtap of most drivers
(see if_percpuq_softint and if_input).

To this end, bpf_mtap_softint mechanism is implemented; it defers
bpf_mtap processing to a dedicated softint for a target driver.
By using the machanism, we can move bpf_mtap processing to softint
without changing target drivers much while it adds some overhead
on CPU and memory. Once target drivers are changed to softint-based,
we should return to normal bpf_mtap.

Proposed on tech-kern and tech-net


To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/doc/TODO.smpnet
cvs rdiff -u -r1.51 -r1.52 src/sys/dev/ic/hd64570.c
cvs rdiff -u -r1.98 -r1.99 src/sys/dev/ic/midway.c
cvs rdiff -u -r1.62 -r1.63 src/sys/dev/pci/if_lmc.c
cvs rdiff -u -r1.23 -r1.24 src/sys/dev/pci/if_lmc.h
cvs rdiff -u -r1.204 -r1.205 src/sys/net/bpf.c
cvs rdiff -u -r1.67 -r1.68 src/sys/net/bpf.h
cvs rdiff -u -r1.39 -r1.40 src/sys/net/bpfdesc.h
cvs rdiff -u -r1.40 -r1.41 src/sys/netisdn/i4b_ipr.c

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