From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joel Soete Subject: Re: [parisc-linux] 2.6.11-rc3-pa3 smp "Segmentation fault" but not up Date: Sun, 16 Jan 2005 00:32:26 +0000 Message-ID: <41E9B61A.5060204@tiscali.be> References: <41E92258.60006@tiscali.be> <20050115144111.GQ30982@parcelfarce.linux.theplanet.co.uk> <41E9952A.1000907@tiscali.be> <20050115224118.GC10070@colo.lackof.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Cc: List Parisc , Matthew Wilcox To: Grant Grundler Return-Path: In-Reply-To: <20050115224118.GC10070@colo.lackof.org> List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: parisc-linux-bounces@lists.parisc-linux.org Hello Grant, Sorry for delay but the n stand in the office and join it from home i need to use vpn connection which deasable my local lan (and also my pop3 access to my isp :-( and obviously irc) Grant Grundler wrote: > On Sat, Jan 15, 2005 at 10:11:54PM +0000, Joel Soete wrote: > >>this patch: >> ? > > > I don't think willy is refering to any particular issue. > > >>Well in doubt I revert all changes since: >> >> >>Btw what do you suspect that Grant (and I) could have missed (just divid by >>2 the number of loop thanks to dword insn)? > > > No - I mangled that. The code you submitted was correct in this regard. Agree (but what could we imagine on a system which only have one atomic insn iirc?) > I fixed the off-by-2x bug in the next commit: > http://cvs.parisc-linux.org/linux-2.6/arch/parisc/kernel/pacache.S?r1=1.10&r2=1.11 > > My suspicion is the prefetching might be causing problems since it's going > past the end of the page. The kernel tmp alias pages might be causing problems > since we don't flush past the end of those. (Or something like that). > sorry I didn't have yet understand all details of prefetching > Can you remove only the prefetching in that algorithm? > Yes, I did and already run one occurence of the loop without pb, .. so we have to be patient to see if first mentioned pb (failures after some loop occurence: about 50 last time) :-) > >>But already strange results: > > ... > >>and after those first 11 failed it seems to continue?? > > > Do you mean after restarting the make the build completed? No, just let continue the loop (that doesn't make sense to me but in fact I already encounter this case with 2.6.10-paXX but don't have time to report it). Is nicol also encounter the same pb (just in case of small diff in hw config)? Thanks, Joel _______________________________________________ parisc-linux mailing list parisc-linux@lists.parisc-linux.org http://lists.parisc-linux.org/mailman/listinfo/parisc-linux