linux-kernel - Re: [PATCH] mm,hwpoison: Return -EBUSY when migration fails

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Message-ID: <20201209103649.GD30892@linux>
Date:   Wed, 9 Dec 2020 11:36:49 +0100
From:   Oscar Salvador <osalvador@...e.de>
To:     David Hildenbrand <david@...hat.com>
Cc:     akpm@...ux-foundation.org, n-horiguchi@...jp.nec.com,
        vbabka@...e.cz, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm,hwpoison: Return -EBUSY when migration fails

On Wed, Dec 09, 2020 at 10:59:04AM +0100, David Hildenbrand wrote:
> On 09.12.20 10:28, Oscar Salvador wrote:
> Do we expect callers to retry immediately? -EAGAIN might make also
> sense. But -EBUSY is an obvious improvement. Do we have callers relying
> on this behavior?

Not really, unless something LTP takes a look at the error code in retries
in case EBUSY.

Take into account that most of the callers do not even really check the
return code (GHES, RAS/CEC, etc.)

-- 
Oscar Salvador
SUSE L3