CVS commit: src/sys/arch/x86

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

Module Name:    src
Committed By:   ad
Date:           Sat Mar 14 18:24:10 UTC 2020

Modified Files:
        src/sys/arch/x86/include: pmap.h pmap_pv.h
        src/sys/arch/x86/x86: pmap.c

Log Message:
PR kern/55071 (Panic shortly after running X11 due to kernel diagnostic assertion "mutex_owned(&pp->pp_lock)")

- Fix a locking bug in pmap_pp_clear_attrs() and in pmap_pp_remove() do the
  TLB shootdown while still holding the target pmap's lock.

Also:

- Finish PV list locking for x86 & update comments around same.

- Keep track of the min/max index of PTEs inserted into each PTP, and use
  that to clip ranges of VAs passed to pmap_remove_ptes().

- Based on the above, implement a pmap_remove_all() for x86 that clears out
  the pmap in a single pass.  Makes exit() / fork() much cheaper.


To generate a diff of this commit:
cvs rdiff -u -r1.112 -r1.113 src/sys/arch/x86/include/pmap.h
cvs rdiff -u -r1.13 -r1.14 src/sys/arch/x86/include/pmap_pv.h
cvs rdiff -u -r1.365 -r1.366 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.