Date: Tue, 26 Jan 2010 18:05:29 +0100 From: Ivan Voras <ivoras@freebsd.org> To: Alexander Leidinger <Alexander@leidinger.net> Cc: Alan Cox <alc@freebsd.org>, svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, John Baldwin <jhb@freebsd.org> Subject: Re: svn commit: r202894 - in head/sys/i386: i386 include Message-ID: <9bbcef731001260905u36436624rfcf466765eee1f6a@mail.gmail.com> In-Reply-To: <20100126141525.10365e5dzlk7jc4k@webmail.leidinger.net> References: <201001231842.o0NIgSa5086957@svn.freebsd.org> <201001250757.49334.jhb@freebsd.org> <20100126141525.10365e5dzlk7jc4k@webmail.leidinger.net>
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2010/1/26 Alexander Leidinger <Alexander@leidinger.net>: > > Quoting John Baldwin <jhb@freebsd.org> (from Mon, 25 Jan 2010 07:57:49 > -0500): > >> On Saturday 23 January 2010 1:42:28 pm Alan Cox wrote: >>> >>> Author: alc >>> Date: Sat Jan 23 18:42:28 2010 >>> New Revision: 202894 >>> URL: http://svn.freebsd.org/changeset/base/202894 >>> >>> Log: >>> =C2=A0Handle a race between pmap_kextract() and pmap_promote_pde(). =C2= =A0This race >>> is >>> =C2=A0known to cause a kernel crash in ZFS on i386 when superpage promo= tion is >>> =C2=A0enabled. >>> >>> =C2=A0Tested by: =C2=A0 =C2=A0netchild >>> =C2=A0MFC after: =C2=A0 =C2=A01 week >> >> Yay! =C2=A0Should we enable pg_ps by default on i386 now? > > Data point, the i386 system where I have superpages enabled is a p4 with > currently 11 jails active. Some webservers, squid, samba, bind, postfix a= nd > a lot of portupgrades (during the last days, I'm updating a jail with a > desktop-setup inside). All jails are on ZFS. Do you have any method of comparing performance before-and-after? There was a thread on some of the mailing lists (stable@/current@?) about squid being the pessimal case for superpages.
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