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
| ||
|
Date: Wed, 10 Jun 2015 20:59:49 +0200 (CEST) From: Thomas Gleixner <tglx@...utronix.de> To: Mike Galbraith <umgwanakikbuti@...il.com> cc: LKML <linux-kernel@...r.kernel.org>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org> Subject: Re: RFC: futex_wait() can DoS the tick On Wed, 10 Jun 2015, Mike Galbraith wrote: > On Wed, 2015-06-10 at 17:12 +0200, Thomas Gleixner wrote: > > > Some more information about your symptoms in form of configuration, > > extra patches, kernel traces etc. would be appreciated. > > homer:~/tmp # perf record -C 3 -eirq:*,irq_vectors:local* -- sleep 10 > [ perf record: Woken up 2 times to write data ] > [ perf record: Captured and wrote 1380.507 MB perf.data (19530595 samples) ] > homer:~/tmp # perf script | grep irq_vectors:local_timer > ksoftirqd/3 19 [003] 5586.564238: irq_vectors:local_timer_entry: vector=239 > ksoftirqd/3 19 [003] 5586.564239: irq_vectors:local_timer_exit: vector=239 > ksoftirqd/3 19 [003] 5586.568238: irq_vectors:local_timer_entry: vector=239 > ksoftirqd/3 19 [003] 5586.568239: irq_vectors:local_timer_exit: vector=239 > ksoftirqd/3 19 [003] 5586.632218: irq_vectors:local_timer_entry: vector=239 That gap is odd. Can you fire up the function tracer please? Thanks, tglx -- 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