Re: softirq-rx and rt_mutex_lock

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ratheesh k wrote:
What i learned that - softirq cannot be put into sleep mode .( Am i right )  ?

Hello, Ratheesh,

I'm adding linux-rt (the real-time linux mailing list, which
is the more appropriate place to put this question first) to
the cc list. Also note that linux-net is mostly a dead list,
as you'll observe if you take a look at the archives, and
netdev@xxxxxxxxxxxxxxx is the more appropriate mailing list
for network development questions (i.e., search here first).

I am facing a problem in my RT linux . I used rt_mutex_lock to protect
one critical section in softirq-rx code . There is some kernel crash
happens in the critical section .

PC- > my function in critical section
LR -> rt_mutex_unlock .

Why LR is rt_mutex unlock ?
If rt_mutex_lock can sleep , softirq-rx may sleep ?

If you are running with the RT patchset (CONFIG_PREEMPT_RT),
yes, irqs are now kernel threads. There is more information
here:

https://rt.wiki.kernel.org/index.php/Main_Page

thanks,
Nivedita
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