Date: Wed, 13 Dec 2017 18:08:01 +0000 From: Alexey Dokuchaev <danfe@FreeBSD.org> To: Eugene Grosbein <eugen@grosbein.net> Cc: rgrimes@freebsd.org, Warner Losh <imp@freebsd.org>, svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r326809 - head/sys/dev/cardbus Message-ID: <20171213180801.GA28514@FreeBSD.org> In-Reply-To: <5A3167E1.2000201@grosbein.net> References: <201712131338.vBDDcHCM091865@pdx.rh.CN85.dnsmgr.net> <5A3167E1.2000201@grosbein.net>
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On Thu, Dec 14, 2017 at 12:48:17AM +0700, Eugene Grosbein wrote: > ... > I don't understand why you want to backout that. It changed nothing for > amd64. An i386 is still vulnerable to double faults just because of a > network packet processing path can overflow kstack for the GENERIC kernel. The reason (or shall I say concern) was raised by kib@, as quoted: > Plain workstation use, like X11+browser+editor+some other programs easily > allocates 1000+ threads. It was still possible to use 32bit x86 for that, > of course in max memory config without PAE, and without ZFS. Add some > load that involves network, for instance torrent client, to establish the > pressure on KVA. > I am almost sure that users would get troubles now. I'm a plain workstation user with X11+browser+torrent+quake2+you-name-it apps, PAE-less, ZFS-less, and I don't want to get troubles due to r326758. ./danfe
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