From: Andi Kleen <andi@firstfloor.org>
To: Pasha Tatashin <pasha.tatashin@oracle.com>
Cc: Andi Kleen <andi@firstfloor.org>,
linux-mm@kvack.org, sparclinux@vger.kernel.org
Subject: Re: [PATCH v2 1/3] sparc64: NG4 memset 32 bits overflow
Date: Wed, 1 Mar 2017 09:31:36 -0800 [thread overview]
Message-ID: <20170301173136.GI26852@two.firstfloor.org> (raw)
In-Reply-To: <6a26815d-0ec2-7922-7202-b1e17d58aa00@oracle.com>
On Wed, Mar 01, 2017 at 11:34:10AM -0500, Pasha Tatashin wrote:
> Hi Andi,
>
> Thank you for your comment, I am thinking to limit the default
> maximum hash tables sizes to 512M.
>
> If it is bigger than 512M, we would still need my patch to improve
Even 512MB seems too large. I wouldn't go larger than a few tens
of MB, maybe 32MB.
Also you would need to cover all the big hashes.
The most critical ones are likely the network hash tables, these
maybe be a bit larger (but certainly also not 0.5TB)
-Andi
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next prev parent reply other threads:[~2017-03-01 17:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-01 0:14 [PATCH v2 0/3] Zeroing hash tables in allocator Pavel Tatashin
2017-03-01 0:14 ` [PATCH v2 1/3] sparc64: NG4 memset 32 bits overflow Pavel Tatashin
2017-03-01 0:24 ` Andi Kleen
2017-03-01 14:51 ` Pasha Tatashin
2017-03-01 15:19 ` Andi Kleen
2017-03-01 16:34 ` Pasha Tatashin
2017-03-01 17:31 ` Andi Kleen [this message]
2017-03-01 21:20 ` Pasha Tatashin
2017-03-01 23:10 ` Andi Kleen
2017-03-02 19:15 ` Pasha Tatashin
2017-03-02 0:12 ` Matthew Wilcox
2017-03-01 0:14 ` [PATCH v2 2/3] mm: Zeroing hash tables in allocator Pavel Tatashin
2017-03-01 0:14 ` [PATCH v2 3/3] mm: Updated callers to use HASH_ZERO flag Pavel Tatashin
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