nuttxpr commented on PR #14200: URL: https://github.com/apache/nuttx/pull/14200#issuecomment-2408798633
[**\[Experimental Bot, please feedback here\]**](https://github.com/search?q=repo%3Aapache%2Fnuttx+13552&type=issues) The PR summary is somewhat vague and doesn't fully adhere to the NuttX requirements. Here's a breakdown and suggestions for improvement: **What's good:** * **Identifies a deadlock issue:** The summary clearly states that the PR aims to fix a deadlock problem. * **Mentions SMP:** It correctly highlights that the issue pertains to Symmetric Multiprocessing (SMP) systems. * **Provides a solution:** Replacing `spin_lock` with `critical_section` is a reasonable approach to address potential deadlocks. **What needs improvement:** * **Insufficient detail in the summary:** * **Why is the change necessary?** While mentioning "deadlock" is a start, it lacks a clear explanation of the scenario leading to the deadlock. How does "holding the irqsaved spinlock first and then taking the critical section" specifically cause a deadlock in an SMP environment? * **What functional part of the code is being changed?** Be more specific than just "group/exitinof." Which functions or data structures within that part are modified? * **How does the change exactly work?** Provide a slightly more detailed explanation of why replacing `spin_lock` with `critical_section` resolves the deadlock. * **Missing information:** * **Related issues:** Are there any related NuttX or NuttX Apps issues that this PR addresses? If so, provide links. * **Incomplete testing section:** * **Build Host(s):** Specify the operating system, CPU architecture, and compiler used for building and testing. * **Target(s):** "sim/smp" is too broad. Mention the specific simulator and its configuration used. * **Testing logs:** You must include actual testing logs (both before and after the change) to demonstrate the issue and the fix. **How to improve the PR:** 1. **Elaborate on the deadlock:** Describe the specific sequence of events and conditions that lead to the deadlock when using `spin_lock`. 2. **Explain the solution's mechanism:** Briefly explain why `critical_section` is a safer choice in this context and how it prevents the deadlock. 3. **Add specifics to the "Impact" section:** * **Is new feature added? Is existing feature changed?** - This is a bug fix, so clarify if any existing functionality is modified as a side effect. * **Impact on other aspects:** Address the remaining "Impact" questions (build process, hardware, documentation, security, compatibility). Even if the answer is "NO", state it explicitly. 4. **Provide detailed testing information:** Include the build host details, specific simulator configuration, and, most importantly, the actual testing logs from before and after your changes. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
