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PR/55071 CVS commit: src/sys/arch/x86

The following reply was made to PR kern/55071; it has been noted by GNATS.

From: "Andrew Doran" <>
Subject: PR/55071 CVS commit: src/sys/arch/x86
Date: Sat, 14 Mar 2020 18:24:10 +0000

 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.
 - 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.

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