Messages in this thread | | | Date | Thu, 30 Aug 2012 15:03:48 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 2/2] [RESEND] add discard support to nbd |
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On Wed, 29 Aug 2012 08:41:02 -0400 paul.clements@steeleye.com wrote:
> Description: This patch adds discard support to nbd. When the nbd client > system receives a discard request, this will be passed along to the nbd > server system, where the nbd-server will respond by performing: > fallocate(.. FALLOC_FL_PUNCH_HOLE ..) > > To punch a hole in the backend storage, which is no longer needed. >
What happens if the user is running an older server?
I is it possible that because the old server didn't set NBD_FLAG_SEND_TRIM, the user's screen gets filled with WARN_ONs?
Anyway, please make sure this combination was tested!
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