| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <200905270306.n4R36OD8055752@www262.sakura.ne.jp> Date: Wed, 27 May 2009 12:06:24 +0900 From: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp> To: rostedt@...dmis.org Cc: linux-kernel@...r.kernel.org, mingo@...e.hu Subject: Re: [2.6.30-rcX] Some ftrace debug option is consuming memory? Hello. Steven Rostedt wrote: > I should have noticed this before. I bet if you disable the branch tracers > you will boot again. The branch tracers makes a table of _all_ branches in > the kernel. But the change we did between 29 and 30 is that we also make > it per cpu. On big boxes the cache line hits were so bad that the > interrupts would take so long that they would live lock the machine. > > You configured 2 CPUS so you doubled the size of that table. > > To test if this is your issue you can try changing NR_CPUS to 1, or just > disabled the BRANCH_PROFILERs. I disabled CONFIG_TRACE_BRANCH_PROFILING and it boots now. # diff config-2.6.30-rc7-ng .config 4c4 < # Mon May 25 13:28:39 2009 --- > # Wed May 27 11:52:49 2009 1546,1549c1546 < CONFIG_TRACE_BRANCH_PROFILING=y < CONFIG_PROFILE_ALL_BRANCHES=y < CONFIG_TRACING_BRANCHES=y < CONFIG_BRANCH_TRACER=y --- > # CONFIG_TRACE_BRANCH_PROFILING is not set Thank you. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists