[PATCH v2 2/2] eal/linux: handle interrupt epoll events

[Kevin Traynor]

On 07/02/2026 06:11, Stephen Hemminger wrote:
> On Fri,  6 Feb 2026 17:20:54 +0000
> Kevin Traynor <ktraynor at redhat.com> wrote:
> 
>> Add handling for epoll error and disconnect conditions EPOLLERR,
>> EPOLLHUP and EPOLLRDHUP.
>>
>> These events indicate that the interrupt file descriptor is in
>> an error state or there has been a hangup.
>>
>> Only do this for interrupts that are read in eal. Interrupts that
>> are read outside eal should deal with different interrupt scenarios
>> appropriate to their functionality. e.g. virtio interrupt handling
>> has reconnect mechanisms for some cases.
>>
>> Also, treat no bytes read as an error condition.
>>
>> Bugzilla ID: 1873
>> Fixes: af75078fece3 ("first public release")
>> Cc: stable at dpdk.org
>>
>> Signed-off-by: Kevin Traynor <ktraynor at redhat.com>
> 
> Minor AI review nits.
> 

Thanks Stephen/AI. I will wait a couple of days and address these and
other comments in v3.

> Code Review
> 
> Errors:
> 
>     Lines 295-298: Block comment uses incorrect style Same issue as patch 1 - should use /* not /** for non-documentation comments.
> 

Ack

> Warnings:
> 
>     Line 304: Return value inconsistency The function returns -1 to force rebuild of the wait list, but this happens in the middle of processing multiple events. The existing code had the same pattern for error handling, so this is consistent with the codebase style.

any interrupts not processed this time are not reset, so this should be
fine.

>     Line 342: Log level changed from ERR to WARNING For a condition that causes interrupt source removal, WARNING may be too low. Consider if INFO (as used in line 300) might be more appropriate for consistency.
> 

I will review the log levels based on David's feedback.

> Overall Assessment
> 
> Both patches address a real bug (busy-looping on interrupt errors) with reasonable solutions. The main issues are code style violations with comment formatting and a minor semicolon error. The logic appears sound for handling the EAGAIN and epoll error conditions.
>