From mboxrd@z Thu Jan 1 00:00:00 1970 From: Denys Fedoryschenko Date: Wed, 13 May 2009 08:01:35 +0000 Subject: Re: Sun fire T2000,BUG: NMI Watchdog detected LOCKUP on CPU12 Message-Id: <200905131101.35358.denys@visp.net.lb> List-Id: References: <200905130300.12084.denys@visp.net.lb> In-Reply-To: <200905130300.12084.denys@visp.net.lb> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: sparclinux@vger.kernel.org On Wednesday 13 May 2009 08:01:46 David Miller wrote: > From: Denys Fedoryschenko > Date: Wed, 13 May 2009 03:00:11 +0300 > > > Hi > > > > Got recently lockups on T2000 machine. Machine is relatively new. > > While compiling with crazy makeflags "-j17" getting such messages. > > Process which was being compiled stuck, and i cannot terminate it. > > That's not "crazy", I use -j32 as a minumum for my builds. :-) > > I started seeing these hangs with 2.6.30-rcX and will try to > bisect it down when I get back from my week long cruise. > > It's definitely a post 2.6.29 regression. Well, buying this t2k was a mistake of management, but it is kind of useful for porting my "heavily bitfielded" userspace app for big-endian's. Other choice is only PS3 or emulators in this country :-( Also this expensive Sun box is terribly slow... dunno if it is a bug of software/kernel or hardware, but it starts from latency while compiling single 100kbyte source, ending even time to make -j17 for a linux kernel source. With such price, at x86, i will see bytes popping from server like a popcorn, getting dizzy because of speed. But seems linux support of both, kind of weak, i will try to fill bugreports/patches. PS3 also had problems with WPA2 + dhcp. Recent commits with maintainers changes shows that Sony guys handling this question (not only for games) and maybe it can be fixed. Sorry for offtopic :-) Now back to main subject... I'm not sure, but maybe even 2.6.28.7, i had something similar. Kernel where hangs occuiring ,i forgot to tell, but it is visible in dmesg - 2.6.29.3. I will try meanwhile falling back to older kernels and to bisect by myself, if i will not become elder person while compiling kernel.