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Date: Fri, 3 Jul 2020 16:17:25 +0000
From: "Maxime Villard" <maxv@netbsd.org>
Subject: CVS commit: src/sys/arch/x86/x86
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Module Name:	src
Committed By:	maxv
Date:		Fri Jul  3 16:17:25 UTC 2020

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

Log Message:
In cpu_uarea_{alloc,free}:

 - My previous change in this file was not correct, kremove does not free
   the underlying PA, which caused a very slow leak under memory pressure.
   Rework to correctly free the PA.
 - Add a second redzone, this time after the stack, to catch several stack
   overflows. The main concern is read overflows which leak the heap that
   follows the stack.
 - UVM_KMF_WAITVA doesn't fail, so remove error check.
 - Add KASSERTs.


To generate a diff of this commit:
cvs rdiff -u -r1.42 -r1.43 src/sys/arch/x86/x86/vm_machdep.c

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