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02e3eb8d48
Some upcoming changes will modify software checksum routines like
in_cksum() to operate using m_apply(), which uses the direct map to
access packet data for unmapped mbufs. This approach of course does not
work on platforms without a direct map, so we have to disallow the use
of unmapped mbufs on such platforms.
I believe this is the right tradeoff: we only configure KTLS on amd64
and arm64 today (and one KTLS consumer, NFS TLS, requires a direct map
already), and the use of unmapped mbufs with plain sendfile is a recent
optimization. If need be, m_apply() could be modified to create
CPU-private mappings of extpg mbuf pages as a fallback.
So, change mb_use_ext_pgs to be hard-wired to zero on systems without a
direct map. Note that PMAP_HAS_DMAP is not a compile-time constant on
some systems, so the default value of mb_use_ext_pgs has to be
determined during boot.
Reviewed by: jhb
Discussed with: gallatin
Sponsored by: The FreeBSD Foundation
(cherry picked from commit
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| .. | ||
| rpcsec_gss | ||
| rpcsec_tls | ||
| auth.h | ||
| auth_none.c | ||
| auth_unix.c | ||
| authunix_prot.c | ||
| clnt.h | ||
| clnt_bck.c | ||
| clnt_dg.c | ||
| clnt_rc.c | ||
| clnt_stat.h | ||
| clnt_vc.c | ||
| getnetconfig.c | ||
| krpc.h | ||
| netconfig.h | ||
| nettype.h | ||
| pmap_prot.h | ||
| replay.c | ||
| replay.h | ||
| rpc.h | ||
| rpc_callmsg.c | ||
| rpc_com.h | ||
| rpc_generic.c | ||
| rpc_msg.h | ||
| rpc_prot.c | ||
| rpcb_clnt.c | ||
| rpcb_clnt.h | ||
| rpcb_prot.c | ||
| rpcb_prot.h | ||
| rpcm_subs.h | ||
| rpcsec_gss.h | ||
| rpcsec_tls.h | ||
| svc.c | ||
| svc.h | ||
| svc_auth.c | ||
| svc_auth.h | ||
| svc_auth_unix.c | ||
| svc_dg.c | ||
| svc_generic.c | ||
| svc_vc.c | ||
| types.h | ||
| xdr.h | ||