PR/55707 CVS commit: src/external/cddl/osnet/dist/uts/common/fs/zfs

["Chuck Silvers" <chs%netbsd.org@localhost>]

The following reply was made to PR kern/55707; it has been noted by GNATS.

From: "Chuck Silvers" <chs%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/55707 CVS commit: src/external/cddl/osnet/dist/uts/common/fs/zfs
Date: Wed, 4 May 2022 15:49:55 +0000

 Module Name:	src
 Committed By:	chs
 Date:		Wed May  4 15:49:55 UTC 2022
 
 Modified Files:
 	src/external/cddl/osnet/dist/uts/common/fs/zfs: arc.c
 
 Log Message:
 fix ARC checks for available memory:
 there's an extra check that we inherited from FreeBSD that tries to
 detect KVA exhaustion on platforms with limited KVA, but the condition
 that decided whether to use the extra check was using a FreeBSDism
 that doesn't exist on NetBSD, resulting in this check being used on
 all platforms.  on amd64 systems with lots of memory, this extra check
 would result in the ARC thinking that it constantly needed to reclaim memory,
 resulting in all the xcall threads running all the time but not doing
 anything useful.  change this condition so that this extra check for
 KVA exhaustion is only used on 32-bit platforms.  fixes PR 55707.
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.20 -r1.21 \
     src/external/cddl/osnet/dist/uts/common/fs/zfs/arc.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.