From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Bader Subject: Re: Another preempt folding issue? Date: Tue, 25 Mar 2014 09:23:37 +0100 Message-ID: <53313D09.7000605@canonical.com> References: <52FCFA23.4060701@canonical.com> <20140213173852.GH6835@laptop.programming.kicks-ass.net> <52FD090C.7010408@canonical.com> <20140213182605.GC14089@laptop.programming.kicks-ass.net> <20140214133428.GB26356@pd.tnic> <52FE2709.3050505@canonical.com> <20140214144700.GC26356@pd.tnic> <52FE4C28.1080500@canonical.com> <20140214172157.GJ6835@laptop.programming.kicks-ass.net> <53062165.3040202@canonical.com> <20140220155041.GG9987@twins.programming.kicks-ass.net> <53306DD8.8020002@redhat.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="Vsfrx4BVLBVrjmgOLudktagLRVPN2Pb5F" Cc: Borislav Petkov , Linux Kernel Mailing List , kvm@vger.kernel.org, Marcelo Tosatti , MASAO TAKAHASHI , Joerg Roedel To: Paolo Bonzini , Peter Zijlstra Return-path: In-Reply-To: <53306DD8.8020002@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --Vsfrx4BVLBVrjmgOLudktagLRVPN2Pb5F Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 24.03.2014 18:39, Paolo Bonzini wrote: > Il 20/02/2014 16:50, Peter Zijlstra ha scritto: >>>>> > >> One thing I likely should do is to reinstall the exact same la= ptop >>>>> with 64bit >>>>> > >> kernel and userspace... maybe only 64bit kernel first... and m= ake sure >>>>> on my >>>>> > >> side that this does not show up on 64bit, too. I took the word= of >>>>> reporters for >>>>> > >> that (and the impression that otherwise many more people would= have >>>>> complained). >>>> > > >>>> > > Yeha, I'm going to try and install some 32bit userspace on a usb= >>>> > > harddisk I've got and see if I can boot my Core2 laptop from tha= t to try >>>> > > and reproduce. >>>> > > >>>> > > But all that is probably going to be Monday :/ >>>> > > >>> > *sigh* Already Thursday... >>> > >>> > Peter, did you get to reproduce this locally? Unfortunately I had s= ome >>> > interruption and have not more Information than on last Friday (whi= ch is that >>> > the same hw but 64bit kernel does not show it). >> I got side-tracked as well, someone reported crashes, which come above= >> weird behaviour :/ >> >=20 > Stefan, Peter, any news here? >=20 > Paolo No, unfortunately not. :( I thought I had some idea as i386 seems to have= soft and hard irqs using a seperate stack and thought they maybe loose the pro= cess flag there (x86_64 seems to always do that for soft irqs and if it does f= or hard irqs it was hidden well enough for me not to see). But trial and error sh= owed showed no improvement when I made a copy of the original TIF_NEED_RSCHED = before executing on stack. So not really any further. And then the usual distractions hit... -Stefan --Vsfrx4BVLBVrjmgOLudktagLRVPN2Pb5F Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCgAGBQJTMT0VAAoJEOhnXe7L7s6jGo4P/jvs5Ni9oD3RJ+lLFUQZ+1wv azh8SaHtk64K6vx7uvLfQLsMyQxc4ytgQQjObEDTbDw8uFp1+xdm7W8lhzizpxUO n0bzL3AaDSt2QXnA4zXnWBTSU+mRNYjqeny5iPQUVHsBr9IVwQc80fjswOPOmosj Yp+g3SGmdVfSZ8uFfXO5s+JqXpw0VxTrNvsD93AiHhxOamUeAJNYyf+HBtJlERfb iNNwGdGPjyLhebYGkwudQdGw1nttrNi5Q5uIY/ePgQ41H4XEH3lSZ4ws1m3FsLLn N1TbLLE8iwz14qo5gYfYCi+HZqxYh/DI+pXgNbHdKU3bqciwFirPQmK4ws1jryJV iuRZHmlvY/34dD+oYxCnLScoqdBoCpNn+bAnuFWpK15lAqSVOHOFIuDvO5cgH0W5 uCETj0jc+tvC1B9jc495pBFdr9NHWSUkacaGvXINvw2TWSAhuMPhrwAnEvcbhR3O Nj0nGCn58o2PtXwqNbapiPqlbqJrOK3lhGRIoK58FN/ACStGPsDFxZi6snwQklsL rjSD9QALaIsUSe/puvhyexpO8I4lEUuynGg3uKz+fkGzgsHAwd8wQD/Z03g9iIqJ Ik4zBwCosMfIZSD75sMiX2Diu2rQd+QEaGSxUm9+T5naI+3HgLwtINMvStiqyGMe oDreGp9KNBwmCY9ilP35 =YbO3 -----END PGP SIGNATURE----- --Vsfrx4BVLBVrjmgOLudktagLRVPN2Pb5F--