From: Klaus Jensen <its@irrelevant.dk>
To: Keith Busch <kbusch@kernel.org>
Cc: Jens Axboe <axboe@fb.com>, Christoph Hellwig <hch@lst.de>,
Sagi Grimberg <sagi@grimberg.me>,
linux-nvme@lists.infradead.org, qemu-block@nongnu.org,
qemu-devel@nongnu.org, Guenter Roeck <linux@roeck-us.net>
Subject: Re: completion timeouts with pin-based interrupts in QEMU hw/nvme
Date: Thu, 19 Jan 2023 08:06:43 +0100 [thread overview]
Message-ID: <Y8jsA0eJPtiB6Bc/@cormorant.local> (raw)
In-Reply-To: <Y8hyFcsYbvLOQ+XJ@kbusch-mbp>
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On Jan 18 15:26, Keith Busch wrote:
> Klaus,
>
> This isn't going to help your issue, but there are at least two legacy
> irq bugs in the nvme qemu implementation.
>
> 1. The admin queue breaks if start with legacy and later initialize
> msix.
>
Hmm. Interesting that we have not encountered this before - is this
because the kernel will enable MSI-X early and use it for the admin
queue immediately?
> 2. The legacy vector is shared among all queues, but it's being
> deasserted when the first queue's doorbell makes it empty. It should
> remain enabled if any cq is non-empty.
I was certain that we fixed this already in commit 83d7ed5c570
("hw/nvme: fix pin-based interrupt behavior (again)")...
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prev parent reply other threads:[~2023-01-19 7:07 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-12 13:10 completion timeouts with pin-based interrupts in QEMU hw/nvme Klaus Jensen
2023-01-12 14:26 ` Guenter Roeck
2023-01-12 16:34 ` Keith Busch
2023-01-12 17:45 ` Klaus Jensen
2023-01-12 17:51 ` Keith Busch
2023-01-12 19:14 ` Guenter Roeck
2023-01-12 19:27 ` Keith Busch
2023-01-13 0:27 ` Guenter Roeck
2023-01-12 23:57 ` Guenter Roeck
2023-01-13 8:54 ` Klaus Jensen
2023-01-13 12:32 ` Peter Maydell
2023-01-13 12:37 ` Klaus Jensen
2023-01-13 12:42 ` Peter Maydell
2023-01-13 12:46 ` Klaus Jensen
2023-01-13 16:52 ` Keith Busch
2023-01-16 21:14 ` Klaus Jensen
2023-01-17 4:58 ` Keith Busch
2023-01-17 16:09 ` Guenter Roeck
2023-01-17 16:18 ` Peter Maydell
2023-01-17 19:21 ` Guenter Roeck
2023-01-18 15:04 ` Peter Maydell
2023-01-18 16:33 ` Keith Busch
2023-01-18 23:06 ` Keith Busch
2023-01-19 0:41 ` Alistair Francis
2023-01-19 2:44 ` Keith Busch
2023-01-19 3:10 ` Alistair Francis
2023-01-19 4:03 ` Keith Busch
2023-01-19 7:28 ` Klaus Jensen
2023-01-19 8:02 ` Klaus Jensen
2023-01-19 14:32 ` Guenter Roeck
2023-01-19 10:35 ` Peter Maydell
2023-01-17 16:05 ` Guenter Roeck
2023-01-18 4:17 ` Keith Busch
2023-01-18 22:26 ` Keith Busch
2023-01-19 7:06 ` Klaus Jensen [this message]
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