Re: [PATCH] scsi: storvsc: Allow only one remove lun work item to be issued per lun

From	Cathy Avery <cavery@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] scsi: storvsc: Allow only one remove lun work item to be issued per lun
Date	2017-04-17 21:50 +0200
Message-ID	<txkOR-4K8-1@gated-at.bofh.it> (permalink)
References	<twwfo-79C-5@gated-at.bofh.it> <twwyK-7vz-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 04/15/2017 10:06 AM, Christoph Hellwig wrote:
> Just add a singlethreaded workqueue for storvsc_handle_error and you'll
> get serialization for all error handling for free.

The problem I am seeing is that many work items can be queued up for the 
same lun before it goes away. The single threaded queue would have to allow
for only a queue of one and no more. Either that or each work item for a 
particular lun must have the same memory address so it gets
rejected if it you try to queue a remove to the same lun twice.

Maybe I am not understanding your suggestion correctly.

Thanks,

Cathy

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[PATCH] scsi: storvsc: Allow only one remove lun work item to be issued per lun Cathy Avery <cavery@redhat.com> - 2017-04-15 15:50 +0200
  Re: [PATCH] scsi: storvsc: Allow only one remove lun work item to be  issued per lun Christoph Hellwig <hch@infradead.org> - 2017-04-15 16:10 +0200
    Re: [PATCH] scsi: storvsc: Allow only one remove lun work item to be  issued per lun Cathy Avery <cavery@redhat.com> - 2017-04-17 21:50 +0200

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