Messages in this thread | | | From | julie Sullivan <> | Subject | Re: PROBLEM: 3.0-rc kernels unbootable since -rc3 | Date | Thu, 7 Jul 2011 20:47:13 +0100 |
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On Wednesday 06 July 2011 22:23:48 Paul E. McKenney wrote: > On Wed, Jul 06, 2011 at 10:10:16PM +0100, julie Sullivan wrote: > > None of my kernels after 3.0-rc3 will boot on my Dell XPS-M1730 > > (x86-64 2-core) test box running > > Ubuntu (Kubuntu) 11.04 (i.e. the first unbootable one was -rc4). > > The machine freezes immediately after selecting the kernel from the > > bootloader menu, leaving > > me with a blank blue screen so I can't give you any log messages. > > > > It bisects to the following commit: > > > > commit a46e0899eec7a3069bcadd45dfba7bf67c6ed016 > > Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com> > > Date: Wed Jun 15 15:47:09 2011 -0700 > > > > rcu: use softirq instead of kthreads except when RCU_BOOST=y > > > > This patch #ifdefs RCU kthreads out of the kernel unless RCU_BOOST=y, > > thus eliminating context-switch overhead if RCU priority boosting has > > not been configured. > > > > Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
> > Hello, Julie, > > One approach would be to cherry-pick the following commits: > > f8b7fc6b514f34a51875dd48dff70d4d17a54f38 rcu: Move RCU_BOOST #ifdefs to header f > a46e0899eec7a3069bcadd45dfba7bf67c6ed016 rcu: use softirq instead of kthreads ex > 09223371deac67d08ca0b70bd18787920284c967 rcu: Use softirq to address performance > 9a432736904d386cda28b987b38ba14dae960ecc rcu: Simplify curing of load woes
> > Another approach would be to move ahead to v3.0-rc4 or later. > > Thanx, Paul
Hi Paul Thanks for your prompt reply, sorry for the delay in mine (real life intervened :-) I tried reverting those 4 commits on v3.0-rc4 and can confirm that it _does_ give me a bootable 3.0-rc4 kernel. I'll do some more testing. If you would like me to try anything specific just let me know :-)
Cheers Julie
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