From: Steven Rostedt <rostedt@goodmis.org>
To: paulmck@linux.vnet.ibm.com
Cc: Fengguang Wu <fengguang.wu@intel.com>,
Steven Rostedt <srostedt@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
David Howells <dhowells@redhat.com>
Subject: Re: __update_max_tr: rcu_read_lock() used illegally while idle!
Date: Tue, 31 Jul 2012 10:56:23 -0400 [thread overview]
Message-ID: <1343746583.27983.55.camel@gandalf.stny.rr.com> (raw)
In-Reply-To: <1343746311.27983.52.camel@gandalf.stny.rr.com>
On Tue, 2012-07-31 at 10:51 -0400, Steven Rostedt wrote:
> > OK, I will bite. How about using something like RCU_NONIDLE(), either
> > directly or open-coded, to make it a legal call site?
>
> OK, then something like:
>
> RCU_NONIDLE(max_data = task_uid(tsk));
>
> would work when called normally or with idle?
>
The comment above RCU_NONIDLE() says:
This macro may be used from process-level code only.
Although I'm not sure what a 'level' is. Do you mean process-context? If
so, then this will not work because it can be called from non process
level code (return from interrupt), or any interrupt that enables
interrupts.
-- Steve
next prev parent reply other threads:[~2012-07-31 14:56 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-24 9:03 Fengguang Wu
2012-07-24 9:07 ` Testing tracer wakeup_rt: .. no entries found ..FAILED! Fengguang Wu
2012-07-25 1:31 ` Testing tracer wakeup: " Fengguang Wu
2012-07-30 15:45 ` Testing tracer wakeup_rt: " Steven Rostedt
2012-07-31 12:17 ` Fengguang Wu
2012-07-31 12:37 ` Avi Kivity
2012-07-31 12:43 ` Steven Rostedt
2012-07-31 12:50 ` Avi Kivity
2012-07-31 13:13 ` Steven Rostedt
2012-07-31 23:43 ` Fengguang Wu
2012-07-31 23:51 ` Steven Rostedt
2012-07-31 23:57 ` Paul E. McKenney
2012-08-01 0:09 ` Steven Rostedt
2012-08-01 0:18 ` Paul E. McKenney
2012-08-01 0:43 ` pci_get_subsys: GFP_KERNEL allocations with IRQs disabled Fengguang Wu
2012-08-22 2:50 ` Fengguang Wu
2012-08-22 7:49 ` Feng Tang
2012-08-22 13:02 ` Fengguang Wu
2012-08-22 18:02 ` Bjorn Helgaas
2012-08-23 5:45 ` Feng Tang
2012-08-23 7:45 ` [PATCH 1/2] PCI: Use local parameter pci_device_id for pci_get_subsys/class() Feng Tang
2012-09-08 1:00 ` Yinghai Lu
2012-09-08 1:32 ` Yinghai Lu
2012-09-08 1:59 ` Greg Kroah-Hartman
2012-09-08 13:42 ` Fengguang Wu
2012-09-08 15:30 ` Yinghai Lu
2012-09-08 15:34 ` Feng Tang
2012-09-08 18:40 ` Yinghai Lu
2012-09-08 21:06 ` Bjorn Helgaas
2012-08-23 7:45 ` [PATCH 2/2] PCI: Remove the obsolete no_pci_devices() check Feng Tang
2012-07-31 23:57 ` Testing tracer wakeup_rt: .. no entries found ..FAILED! Fengguang Wu
2012-08-07 13:29 ` Steven Rostedt
2012-08-07 13:32 ` Fengguang Wu
2012-08-21 15:16 ` [tip:perf/core] tracing: Fix wakeup_rt self test on virtual machines tip-bot for Steven Rostedt
2012-07-30 15:39 ` __update_max_tr: rcu_read_lock() used illegally while idle! Steven Rostedt
2012-07-31 12:05 ` Fengguang Wu
2012-07-31 12:10 ` Fengguang Wu
2012-07-31 13:44 ` Steven Rostedt
2012-07-31 14:41 ` Paul E. McKenney
2012-07-31 13:33 ` Steven Rostedt
2012-07-31 14:44 ` Paul E. McKenney
2012-07-31 14:51 ` Steven Rostedt
2012-07-31 14:56 ` Steven Rostedt [this message]
2012-07-31 15:18 ` Paul E. McKenney
2012-07-31 15:45 ` Steven Rostedt
2012-07-31 17:17 ` Paul E. McKenney
2012-07-31 17:24 ` Steven Rostedt
2012-07-31 17:44 ` Paul E. McKenney
2012-07-31 18:06 ` Steven Rostedt
2012-07-31 18:21 ` Paul E. McKenney
2012-07-31 15:00 ` Paul E. McKenney
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1343746583.27983.55.camel@gandalf.stny.rr.com \
--to=rostedt@goodmis.org \
--cc=dhowells@redhat.com \
--cc=fengguang.wu@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=paulmck@linux.vnet.ibm.com \
--cc=srostedt@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®