Re: kern/54503: Panic during attaching nvme(4) when # of logical CPUs >= 32 ?

[Rin Okuyama <rokuyama.rk%gmail.com@localhost>]

The following reply was made to PR kern/54503; it has been noted by GNATS.

From: Rin Okuyama <rokuyama.rk%gmail.com@localhost>
To: =?UTF-8?B?SmFyb23DrXIgRG9sZcSNZWs=?= <jaromir.dolecek%gmail.com@localhost>
Cc: "gnats-bugs%NetBSD.org@localhost" <gnats-bugs%NetBSD.org@localhost>
Subject: Re: kern/54503: Panic during attaching nvme(4) when # of logical CPUs
 >= 32 ?
Date: Fri, 30 Aug 2019 19:36:37 +0900

 On 2019/08/30 0:12, Jaromír DoleÄ?ek wrote:
 > Le jeu. 29 août 2019 à 13:00, <coypu%sdf.org@localhost> a écrit :
 >>   on irc jared points out
 >>
 >>   arch/x86/include/intrdefs.h
 >>   50:#define MAX_INTR_SOURCES    32
 > 
 > I think this is only per CPU limit.
 
 I think so too. Actually, ixg(4) uses MSI-X interrupts with 49 vectors
 when hyper threading is enabled:
 
 http://www.netbsd.org/~rin/nvme_panic_20190829/nvme_disabled/dmesg
 
 Considering with wiz@'s workaround, I guess that something may go wrong
 when MSI-X interrupts are established in the nvme(4) code.
 
 Thanks,
 rin