linux-kernel - Re: [PATCH v2] hv: retry infinitely on hypercall transient failures

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Message-ID: <20170105074742.GB4547@kroah.com>
Date:   Thu, 5 Jan 2017 08:47:42 +0100
From:   Greg KH <greg@...ah.com>
To:     Long Li <longli@...hange.microsoft.com>
Cc:     "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        devel@...uxdriverproject.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] hv: retry infinitely on hypercall transient failures

On Wed, Jan 04, 2017 at 06:12:20PM -0800, Long Li wrote:
> From: Long Li <longli@...rosoft.com>
> 
> Hyper-v host guarantees that a hypercall will finish in reasonable time.
> Retry infinitely on transient failures to avoid returning error to upper layer.

Again, never retry "forever", always have a way out, otherwise you will
crash.

And again, why are you making this change?  What problem does it solve?

greg k-h