linux-kernel - Re: [LSF/MM TOPIC NOTES] x86 ZONE

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Date:   Fri, 27 Apr 2018 09:28:22 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     "Luis R. Rodriguez" <mcgrof@...nel.org>
Cc:     Christoph Hellwig <hch@...radead.org>, linux-mm@...ck.org,
        mhocko@...nel.org, cl@...ux.com, Jan Kara <jack@...e.cz>,
        matthew@....cx, x86@...nel.org, luto@...capital.net,
        martin.petersen@...cle.com, jthumshirn@...e.de, broonie@...nel.org,
        Juergen Gross <jgross@...e.com>, linux-spi@...r.kernel.org,
        Joerg Roedel <joro@...tes.org>, linux-scsi@...r.kernel.org,
        Dan Carpenter <dan.carpenter@...cle.com>,
        linux-kernel@...r.kernel.org,
        "lsf-pc@...ts.linux-foundation.org" 
        <lsf-pc@...ts.linux-foundation.org>
Subject: Re: [LSF/MM TOPIC NOTES] x86 ZONE_DMA love

On Fri, Apr 27, 2018 at 04:14:56PM +0000, Luis R. Rodriguez wrote:
> > Not really.  We have unchecked_isa_dma to support about 4 drivers,
> 
> Ah very neat:
> 
>   * CONFIG_CHR_DEV_OSST - "SCSI OnStream SC-x0 tape support"

That's an upper level driver, like cdrom, disk and regular tapes.

>   * CONFIG_SCSI_ADVANSYS - "AdvanSys SCSI support"

If we ditch support for the ISA boards, this can go away.

>   * CONFIG_SCSI_AHA1542 - "Adaptec AHA1542 support"

Probably true.

>   * CONFIG_SCSI_ESAS2R - "ATTO Technology's ExpressSAS RAID adapter driver"

That's being set to 0.

You missed BusLogic.c and gdth.c