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Re: kern/54837: ixl* + wm* interrupt allocation fails
The following reply was made to PR kern/54837; it has been noted by GNATS.
From: Shoichi Yamaguchi <s.ymgch228%gmail.com@localhost>
To: gnats-bugs%netbsd.org@localhost, kern-bug-people%netbsd.org@localhost,
gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, kardel%netbsd.org@localhost
Subject: Re: kern/54837: ixl* + wm* interrupt allocation fails
Date: Fri, 10 Jan 2020 14:48:11 +0900
>> To mitigate this problem, x86's softint bitmask should be
> s/softint bitmask/imask, ipending and some others/
>> increased from 32bit to 64bit. Even if it's done, the problem
>> won't be solved on many core systems. To resolve the problem,
>> IDTVEC should be per-CPU.
This problem may be avoided by using "IXL_QUEUE_NUM" added at
The kernel option can restrict resources related to queue pairs
including an interrupt when the parameter sets to less than
the number of cpus.
This is a workaround, not a solution since the restriction causes the
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