Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1637732
| From | Steven Rostedt <rostedt@goodmis.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code |
| Date | 2017-05-08 23:20 +0200 |
| Message-ID | <tEYeu-Lz-29@gated-at.bofh.it> (permalink) |
| References | (2 earlier) <tEUaS-6rk-3@gated-at.bofh.it> <tEWmm-80A-23@gated-at.bofh.it> <tEWPo-8b6-17@gated-at.bofh.it> <tEXip-8Y-7@gated-at.bofh.it> <tEXLs-ls-19@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, 8 May 2017 15:43:33 -0500 Josh Poimboeuf <jpoimboe@redhat.com> wrote: > Ok, so just to clarify. Is there a bug in the ftrace stack tracer in > the following situation? > > 1. RCU isn't watching > 2. An NMI hits > 3. ist_enter() calls into the ftrace stack tracer, before > rcu_nmi_enter() is called, so RCU isn't watching yet No, because in the ftrace stack tracer there's: if (in_nmi()) return; At the very beginning. -- Steve > 4. The ftrace stack tracer calls rcu_irq_enter(), which has no effect, > so RCU still isn't watching > 5. Hilarity ensues in the ftrace stack tracer >
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH 0/3] livepatch/rcu: Handle some subtle issues between livepatching and RCU Petr Mladek <pmladek@suse.com> - 2017-05-04 13:00 +0200
[PATCH 1/3] livepatch/rcu: Guarantee consistency when patching idle kthreads Petr Mladek <pmladek@suse.com> - 2017-05-04 13:00 +0200
[PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Petr Mladek <pmladek@suse.com> - 2017-05-04 13:00 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Josh Poimboeuf <jpoimboe@redhat.com> - 2017-05-08 19:00 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Steven Rostedt <rostedt@goodmis.org> - 2017-05-08 21:20 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Josh Poimboeuf <jpoimboe@redhat.com> - 2017-05-08 21:50 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-08 22:20 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Josh Poimboeuf <jpoimboe@redhat.com> - 2017-05-08 22:50 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Josh Poimboeuf <jpoimboe@redhat.com> - 2017-05-08 23:00 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-08 23:10 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-08 23:10 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Steven Rostedt <rostedt@goodmis.org> - 2017-05-08 23:20 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-08 23:40 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Josh Poimboeuf <jpoimboe@redhat.com> - 2017-05-09 00:20 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-09 00:40 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Josh Poimboeuf <jpoimboe@redhat.com> - 2017-05-09 18:20 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-09 18:40 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Petr Mladek <pmladek@suse.com> - 2017-05-10 18:10 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-10 18:50 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Josh Poimboeuf <jpoimboe@redhat.com> - 2017-05-10 20:00 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Miroslav Benes <mbenes@suse.cz> - 2017-05-11 14:50 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Josh Poimboeuf <jpoimboe@redhat.com> - 2017-05-11 17:10 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Steven Rostedt <rostedt@goodmis.org> - 2017-05-08 23:20 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Steven Rostedt <rostedt@goodmis.org> - 2017-05-08 22:20 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Miroslav Benes <mbenes@suse.cz> - 2017-05-11 15:00 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Petr Mladek <pmladek@suse.com> - 2017-05-11 16:00 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-11 17:00 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Josh Poimboeuf <jpoimboe@redhat.com> - 2017-05-11 17:30 +0200
Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code Petr Mladek <pmladek@suse.com> - 2017-05-11 14:50 +0200
Re: [PATCH 0/3] livepatch/rcu: Handle some subtle issues between livepatching and RCU "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-04 19:00 +0200
csiph-web