linux-kernel - Re: [PATCH 2/2] scsi: ufs: Return a bsg request immediatley if eh-in-progress

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Message-ID: <06c95606-ac89-5750-224f-04c72b5cc111@acm.org>
Date:   Mon, 8 Nov 2021 09:32:07 -0800
From:   Bart Van Assche <bvanassche@....org>
To:     Avri Altman <Avri.Altman@....com>,
        "James E . J . Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>
Cc:     "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH 2/2] scsi: ufs: Return a bsg request immediatley if
 eh-in-progress

On 11/8/21 9:24 AM, Avri Altman wrote:
> I am not sure. I would expect a retry / polling / other, if any, to
> be done in user-space and not in the kernel. e.g. a common practice
> in the code that send SG_IO or other ioctls is to retry on EBUSY. Not
> sure that this is the case in ufs-utils though.
Shouldn't we aim to make sure that user space code does not have to use 
busy waiting?

Thanks,

Bart.