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From: Josef Bacik <josef@toxicpanda.com>
To: Yao Liu <yotta.liu@ucloud.cn>
Cc: Josef Bacik <josef@toxicpanda.com>, Jens Axboe <axboe@kernel.dk>,
	linux-block@vger.kernel.org, nbd@other.debian.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] nbd: mark sock as dead even if it's the last one
Date: Fri, 24 May 2019 09:17:15 -0400	[thread overview]
Message-ID: <20190524131714.i3lbkbokad6xmotv@MacBook-Pro-91.local.dhcp.thefacebook.com> (raw)
In-Reply-To: <1558691036-16281-3-git-send-email-yotta.liu@ucloud.cn>

On Fri, May 24, 2019 at 05:43:56PM +0800, Yao Liu wrote:
> When sock dead, nbd_read_stat should return a ERR_PTR and then we should
> mark sock as dead and wait for a reconnection if the dead sock is the last
> one, because nbd_xmit_timeout won't resubmit while num_connections <= 1.

num_connections is the total number of connections that the device was set up
with, not how many are left.  Now since we have the dead_conn_timeout timeout
stuff now which didn't exist when I originally wrote this code I'd be ok with
doing that, but not the way you have it now.  It would be something more like

	if (nbd_disconnected(config) ||
	    (config->num_connections <= 1 &&
	     !config->dead_conn_timeout)

instead.  Thanks,

Josef

  reply	other threads:[~2019-05-24 13:17 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-24  9:43 [PATCH 1/3] nbd: fix connection timed out error after reconnecting to server Yao Liu
2019-05-24  9:43 ` [PATCH 2/3] nbd: notify userland even if nbd has already disconnected Yao Liu
2019-05-24 13:08   ` Josef Bacik
2019-05-27 18:23     ` Yao Liu
2019-05-28 16:36       ` Mike Christie
2019-05-28 20:05         ` Yao Liu
2019-05-28 16:54       ` Josef Bacik
2019-05-24  9:43 ` [PATCH 3/3] nbd: mark sock as dead even if it's the last one Yao Liu
2019-05-24 13:17   ` Josef Bacik [this message]
2019-05-27 18:29     ` Yao Liu
2019-05-24 13:07 ` [PATCH 1/3] nbd: fix connection timed out error after reconnecting to server Josef Bacik
2019-05-27 18:07   ` Yao Liu
2019-05-28 16:57     ` Josef Bacik
2019-05-28 19:04       ` Yao Liu
2019-05-29 13:49         ` Josef Bacik

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