Re: [I] [BUG] SMP signal dispatch seems racy [nuttx]

[via GitHub]

yamt commented on issue #14807:
URL: https://github.com/apache/nuttx/issues/14807#issuecomment-2478763166

   > > as nxsched_smp_call_single drops the critical section, there seems to be 
nothing to prevent the signal mask from changing in the meantime. it can end up 
with a signal delivered while being blocked.
   > 
   > I don't think this change caused #14749, because the release of the 
critical section is going to happen regardless of whether I call 
nxsched_smp_call_single or not. 
![image](https://private-user-images.githubusercontent.com/128452594/386530328-103070aa-35b1-4835-8285-e163ae067945.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3MzE2NzU3MjksIm5iZiI6MTczMTY3NTQyOSwicGF0aCI6Ii8xMjg0NTI1OTQvMzg2NTMwMzI4LTEwMzA3MGFhLTM1YjEtNDgzNS04Mjg1LWUxNjNhZTA2Nzk0NS5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjQxMTE1JTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI0MTExNVQxMjU3MDlaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT1iODg1Mjk2MTU4NWY2NDM4NTU1Nzg0ZmYyNTgzZjRkYTI5ZGIzM2QyMzFlMDZiMmFhYTE5ZjZjM2ZjOGQ5YmY4JlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.J_hhPdrBL-n4uzjaJRCAgq3-6JJQmGI9HEeP3qDq4k4)
   
   i don't understand your logic.
   in non cross call case, the critical section is released after 
up_schedule_sigaction.
   


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