Date: Sun, 9 Jan 2005 16:10:44 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-current@freebsd.org Cc: Scott Long <scottl@freebsd.org> Subject: Re: bus_dmamem_alloc() can't handle large NOWAIT requests Message-ID: <200501091610.51185.doconnor@gsoft.com.au> In-Reply-To: <41E0C02F.60100@freebsd.org> References: <20050109011132.GJ39552@cirb503493.alcatel.com.au> <41E0C02F.60100@freebsd.org>
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--nextPart6024751.l3Fc9boJEZ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Sun, 9 Jan 2005 15:55, Scott Long wrote: > > bus_dmamem_alloc() maps BUS_DMA_NOWAIT to M_NOWAIT but contigmalloc() > > does not support M_NOWAIT and will tsleep() under some conditions. > > > > Unfortunately, I don't know enough about the VM code to be able to > > suggest a fix. > > Will contigmalloc() actually sleep? If so, then this is something that > needs to be addressed in contigmalloc. Couldn't contigmalloc() just return NULL if it was going to sleep? (hehe.. "just" ;) =2D-=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C --nextPart6024751.l3Fc9boJEZ Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQBB4MPj5ZPcIHs/zowRArkAAJ0WjM7ycTtZ41lnzIdr8e0xVDmiQQCfcvB9 BpHsDxxEYyd3hK8rt0CCSME= =OSdh -----END PGP SIGNATURE----- --nextPart6024751.l3Fc9boJEZ--
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