Date: Wed, 30 Jan 2013 22:49:07 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: freebsd-arch@FreeBSD.org Subject: Re: kva size on amd64 Message-ID: <51098743.2050603@FreeBSD.org> In-Reply-To: <507E7E59.8060201@FreeBSD.org> References: <507E7E59.8060201@FreeBSD.org>
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on 17/10/2012 12:46 Andriy Gapon said the following: > > What are the main benefits, if any, of limiting KVA space size - or in fact > tying it to physical memory size - on amd64? > This question is perhaps relevant to other platforms with "unlimited kva" too. I actually already have patch that auto-sets kmem_size to kmem_size_max on amd64. My primary motivation is that I from time to time still see reports about too small kmem_map on non-tuned amd64 systems. This is really ridiculous regardless of whether there is ZFS in use or not. Another motivation is that I really see no reason at all to artificially limit KVA. This creates no benefits, increases fragility and reduces flexibility. -- Andriy Gapon
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