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Groups > linux.kernel > #1219522
| From | Steven Rostedt <rostedt@goodmis.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack |
| Date | 2015-09-05 14:30 +0200 |
| Message-ID | <q5kLv-mE-7@gated-at.bofh.it> (permalink) |
| References | <q4NZf-3Zz-3@gated-at.bofh.it> <q5j35-6jH-41@gated-at.bofh.it> <q5ks9-8rE-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Sat, 5 Sep 2015 14:04:57 +0200
Ingo Molnar <mingo@kernel.org> wrote:
> So why not do:
>
> lock(B);
> if (!trylock(A)) {
> unlock(B);
> lock(A);
> lock(B);
> }
>
> ?
>
> Or, if this can be done, why didn't we do:
>
> lock(A);
> lock(B);
>
> to begin with?
>
> i.e. I'm not sure the problem is properly specified.
Yeah, this is actually the solution I came up with before. I misread
what Thomas wrote. His is slightly different.
-- Steve
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[RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Steven Rostedt <rostedt@goodmis.org> - 2015-09-04 03:30 +0200
[RFC][PATCH RT 3/3] rt: Make cpu_chill() into yield() and add new cpu_rest() as msleep(1) Steven Rostedt <rostedt@goodmis.org> - 2015-09-04 03:30 +0200
[RFC][PATCH RT 2/3] locking: Convert trylock spinners over to spin_try_or_boost_lock() Steven Rostedt <rostedt@goodmis.org> - 2015-09-04 03:30 +0200
[RFC][PATCH RT 1/3] locking: Add spin_try_or_boost_lock() infrastructure Steven Rostedt <rostedt@goodmis.org> - 2015-09-04 03:30 +0200
Re: [RFC][PATCH RT 1/3] locking: Add spin_try_or_boost_lock() infrastructure Steven Rostedt <rostedt@goodmis.org> - 2015-09-04 03:50 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Thomas Gleixner <tglx@linutronix.de> - 2015-09-05 12:40 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Ingo Molnar <mingo@kernel.org> - 2015-09-05 14:10 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Steven Rostedt <rostedt@goodmis.org> - 2015-09-05 14:30 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Thomas Gleixner <tglx@linutronix.de> - 2015-09-07 10:40 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Thomas Gleixner <tglx@linutronix.de> - 2015-09-07 12:20 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Ingo Molnar <mingo@kernel.org> - 2015-09-08 09:40 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Thomas Gleixner <tglx@linutronix.de> - 2015-09-08 10:20 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Ingo Molnar <mingo@kernel.org> - 2015-09-14 12:00 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Steven Rostedt <rostedt@goodmis.org> - 2015-09-08 19:00 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Steven Rostedt <rostedt@goodmis.org> - 2015-09-08 21:40 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Steven Rostedt <rostedt@goodmis.org> - 2015-09-05 14:20 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Steven Rostedt <rostedt@goodmis.org> - 2015-09-05 14:30 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Steven Rostedt <rostedt@goodmis.org> - 2015-09-05 15:00 +0200
Re: [RFC][PATCH RT 0/3] RT: Fix trylock deadlock without msleep() hack Thomas Gleixner <tglx@linutronix.de> - 2015-09-07 11:20 +0200
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