From: Sagi Grimberg <sagi@grimberg.me>
To: Chao Leng <lengchao@huawei.com>, linux-nvme@lists.infradead.org
Cc: kbusch@kernel.org, axboe@fb.com, hch@lst.de
Subject: Re: [PATCH] nvme-fabrics: fix crash for no IO queues
Date: Mon, 15 Mar 2021 10:08:58 -0700 [thread overview]
Message-ID: <45d16780-79a0-c2e2-8e90-246dae0b3e23@grimberg.me> (raw)
In-Reply-To: <78c5e9f9-f5b8-b8e5-1c36-3a5803d4b047@huawei.com>
>>> A crash happens when set feature(NVME_FEAT_NUM_QUEUES) timeout in nvme
>>> over rdma(roce) reconnection, the reason is use the queue which is not
>>> alloced.
>>>
>>> If queue is not live, should not allow queue request.
>>
>> Can you describe exactly the scenario here? What is the state
>> here? LIVE? or DELETING?
> If seting feature(NVME_FEAT_NUM_QUEUES) failed due to time out or
> the target return 0 io queues, nvme_set_queue_count will return 0,
> and then reconnection will continue and success. The state of controller
> is LIVE. The request will continue to deliver by call ->queue_rq(),
> and then crash happens.
Thinking about this again, we should absolutely fail the reconnection
when we are unable to set any I/O queues, it is just wrong to
keep this controller alive...
This should be fixed for both rdma and tcp.
_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme
next prev parent reply other threads:[~2021-03-15 17:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-04 0:55 [PATCH] nvme-fabrics: fix crash for no IO queues Chao Leng
2021-03-05 20:58 ` Sagi Grimberg
2021-03-08 1:30 ` Chao Leng
2021-03-15 17:08 ` Sagi Grimberg [this message]
2021-03-16 1:23 ` Chao Leng
2021-03-16 2:02 ` Keith Busch
2021-03-16 5:08 ` Sagi Grimberg
2021-03-16 20:57 ` James Smart
2021-03-16 21:25 ` Keith Busch
2021-03-16 23:52 ` Sagi Grimberg
2021-03-17 0:19 ` James Smart
-- strict thread matches above, loose matches on Subject: below --
2021-03-03 2:53 Chao Leng
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=45d16780-79a0-c2e2-8e90-246dae0b3e23@grimberg.me \
--to=sagi@grimberg.me \
--cc=axboe@fb.com \
--cc=hch@lst.de \
--cc=kbusch@kernel.org \
--cc=lengchao@huawei.com \
--cc=linux-nvme@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).