Date: Tue, 6 Mar 2018 14:18:45 +0000 (UTC) From: "Jonathan T. Looney" <jtl@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r330538 - head/sys/conf Message-ID: <201803061418.w26EIjZB016089@repo.freebsd.org>
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Author: jtl Date: Tue Mar 6 14:18:45 2018 New Revision: 330538 URL: https://svnweb.freebsd.org/changeset/base/330538 Log: Nudge lld to break the kernel read-only and read-write sections into separate 2M pages. The binutils default for max-page-size and common-page-size used to produce this result. By setting these values, we can nudge lld to also separate these sections into separate 2M pages. Reviewed by: jhb, kib Discussed with: emaste Sponsored by: Netflix Differential Revision: D14282 Modified: head/sys/conf/kern.pre.mk Modified: head/sys/conf/kern.pre.mk ============================================================================== --- head/sys/conf/kern.pre.mk Tue Mar 6 12:58:00 2018 (r330537) +++ head/sys/conf/kern.pre.mk Tue Mar 6 14:18:45 2018 (r330538) @@ -120,6 +120,10 @@ CFLAGS+= ${CONF_CFLAGS} LDFLAGS+= -Wl,--build-id=sha1 .endif +.if ${MACHINE_CPUARCH} == "amd64" +LDFLAGS+= -Wl,-z max-page-size=2097152 -Wl,-z common-page-size=4096 +.endif + NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC} NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC} PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
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