CVS commit: src/sys/net

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Thu Apr 29 17:55:51 UTC 2021

Modified Files:
        src/sys/net: if_wg.c

Log Message:
Sprinkle __noinline to reduce gigantic stack frames in ALL kernels.

In principle this might just push a real problem around, but this is
unlikely to be a real problem because:

1. The large stack frames are really only in the setup state machine
   message handlers, which run at the top loop of a thread with a
   shallow stack anyway.

2. If these are inlined, gcc might create multiple nonoverlapping
   stack buffers, whereas if not inlined, the stack frames from
   consecutive or alternative procedure calls would overlap anyway.

(I haven't investigated exactly what's going on leading to ~5 KB-byte
stack frames, but this shuts gcc up, at least, and the hypotheses
sound plausible to me!)


To generate a diff of this commit:
cvs rdiff -u -r1.62 -r1.63 src/sys/net/if_wg.c

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