CVS commit: src/sys/arch/x86/x86

["Andrew Doran" <ad%netbsd.org@localhost>]

Module Name:    src
Committed By:   ad
Date:           Tue Mar 17 18:40:35 UTC 2020

Modified Files:
        src/sys/arch/x86/x86: pmap.c

Log Message:
- Add more assertions.

- Range clipping for pmap_remove(): only need to keep track of the lowest VA
  in PTP, as ptp->wire_count provides an upper bound.  D'oh.  Move set of
  range to where there is already a writeback to the PTP.

- pmap_pp_remove(): panic if pmap_sync_pv() returns an error, because it means
  something has gone very wrong.  The PTE should not change here since the
  pmap is locked.

- pmap_pp_clear_attrs(): wait for the competing V->P operation by acquiring
  and releasing the pmap's lock, rather than busy looping.

- pmap_test_attrs(): this needs to wait for any competing operations,
  otherwise it could return without all necessary updates reflected in
  pp_attrs.

- pmap_enter(): fix cut-n-paste screwup in an error path for Xen.


To generate a diff of this commit:
cvs rdiff -u -r1.371 -r1.372 src/sys/arch/x86/x86/pmap.c

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