Date: Mon, 11 Mar 2013 10:59:36 +0100 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: Konstantin Belousov <kostikbel@gmail.com> Cc: arch@freebsd.org Subject: Re: Unmapped buffers: to be merged in several days Message-ID: <86k3pe1cl3.fsf@ds4.des.no> In-Reply-To: <20130311091852.GR3794@kib.kiev.ua> (Konstantin Belousov's message of "Mon, 11 Mar 2013 11:18:52 %2B0200") References: <20130311091852.GR3794@kib.kiev.ua>
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Konstantin Belousov <kostikbel@gmail.com> writes: > The ahci(4) and md(4) is converted to accept unmapped BIO requests. > Other drivers and geom classes get the compat mapped BIOs, the > transient mapping is established by the geom down thread. The KVA > for the transient maping the carved from the buffer map, up to 10% > of which is repurposed to the transient bio KVA. The hope is that > the rest of drivers and geom classes will be converted to accept > unmapped i/o shortly, making the transient map unused. Could you briefly summarize what needs to be done to convert a driver? DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no
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