netdev - Re: [PATCH 2/3] rhashtable-test: retry insert operations in threads

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Message-ID: <20150901140341.GA13757@gondor.apana.org.au>
Date:	Tue, 1 Sep 2015 22:03:41 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	tgraf@...g.ch, davem@...emloft.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, fengguang.wu@...el.com,
	wfg@...ux.intel.com, lkp@...org
Subject: Re: [PATCH 2/3] rhashtable-test: retry insert operations in threads

On Tue, Sep 01, 2015 at 03:56:18PM +0200, Phil Sutter wrote:
> 
> Looking at rhashtable_test.c, I see the initial table size is 8 entries.
> 70% of that is 5.6 entries, so background expansion is started after the
> 6th entry has been added, right? Given there are 10 threads running
> which try to insert 50k entries at the same time, I don't think it's
> unlikely that three more entries are inserted before the background
> expansion completes.

Yes but in that case the GFP_ATOMIC allocation should work because
the table is so small anyway.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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