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Date: Mon, 16 Mar 2015 10:52:11 -0400
From: Max Reitz <mreitz@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 20/25] block/nbd: Comment on discard/flush
	silently failing
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To: Paolo Bonzini <pbonzini@redhat.com>, qemu-block@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>, qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>

On 2015-03-16 at 10:51, Paolo Bonzini wrote:
>
> On 16/03/2015 15:49, Max Reitz wrote:
>>> Right, but a better model than block.c should be for example
>>> block/raw-posix.c, which returns ENOTSUP (I checked now...).
>> Maybe we should catch ENOTSUP in bdrv_co_discard() and override it?
> That's what it does:
>
>          if (ret && ret != -ENOTSUP) {
>              return ret;
>          }

Oops, thanks for telling me. Good, then I'll do that, thanks.

Max

> Returning 0 for NBD's flush_to_disk, by the way, is okay.
>
> Paolo