Re: regression caused by block: freeze the queue earlier in del_gendisk
From: Christoph Hellwig <hch@lst.de>
Date: 2022-09-12 07:19:26
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linux-block, lkml
On Fri, Sep 09, 2022 at 04:24:40PM +0800, Ming Lei wrote:
On Wed, Sep 07, 2022 at 09:33:24AM +0200, Christoph Hellwig wrote:quoted
On Thu, Sep 01, 2022 at 03:06:08PM +0800, Ming Lei wrote:quoted
It is a bit hard to associate the above commit with reported issue.So the messages clearly are about something trying to open a device that went away at the block layer, but somehow does not get removed in time by udev (which seems to be a userspace bug in CoreOS). But even with that we really should not hang.Xiao Ni provides one script[1] which can reproduce the issue more or less.
I've run the reproduced 10000 times on current mainline, and while it prints one of the autoloading messages per run, I've not actually seen any kind of hang.