Date: Sun, 27 Nov 2005 17:45:38 -0500 From: Michael Butler <imbutler@comcast.net> To: =?ISO-8859-1?Q?S=F8ren_Schmidt?= <sos@FreeBSD.ORG> Cc: stable@FreeBSD.ORG Subject: Re: ata (raid) patches Message-ID: <438A3712.1040804@comcast.net> In-Reply-To: <438A1BA1.1010407@deepcore.dk> References: <438A116C.3010803@protected-networks.net> <438A1BA1.1010407@deepcore.dk>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Søren Schmidt wrote: |> 3) another part of this patch is to ata-raid where the choice of drive |> from which to read favours one side of a mirror even when both drives |> are near the block(s) we want. Because the mirror is on another channel |> on the Highpoint controller, it performs (marginally :-() better when we |> toggle between them. | | | Hmm, well, depends on what sort of behavior one wants to optimise for. I | have a few other patches for optimisations but havn't decided what to | eventually use yet. Guess its time for me to run some tests on this.. On further investigation, I'd failed to notice (doh!) that rdp->toggle isn't preserved between requests and that one unobvious side-effect of the original code is that it does slightly better than my patched version .. <sigh>. I'll rework this and see if I can make it do better, Michael -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (MingW32) iD8DBQFDijcSiJykeV6HPMURAiRkAJ4omvpWlXhsJn+B17jZiyCwCl58DgCdFXJJ EndsDJBOOn/m3Dl5fQkMziA= =6dn0 -----END PGP SIGNATURE-----
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