linux-kernel - Re: random: Wake up writers when random pools are zapped

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Message-ID: <20180519215519.GA23448@thunk.org>
Date:   Sat, 19 May 2018 17:55:19 -0400
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: random: Wake up writers when random pools are zapped

On Fri, May 18, 2018 at 02:57:36PM +0800, Herbert Xu wrote:
> As it is when the pool is zapped with RNDCLEARPOOL writers are
> not woken up and therefore the pool may remain in the empty state
> indefinitely.
> 
> This patch wakes them up unless the write threshold is set to zero.
> 
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Thanks, applied.

Out of curiosity, how/when were you using RNDCLEARPOOL/RNDZAPENTCNT?
Hopefully it was only testing hw_random drivers, or some such?

	     	      	      		- Ted