Date: Thu, 17 Apr 2008 19:53:38 +0200 From: Fabian Keil <freebsd-listen@fabiankeil.de> To: =?ISO-8859-1?Q?S=F8ren?= Schmidt <sos@FreeBSD.org> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/ata ata-all.c ata-all.h ata-chipset.c ata-disk.c ata-dma.c ata-lowlevel.c ata-pci.c ata-queue.c ata-raid.c atapi-cam.c atapi-cd.c atapi-fd.c atapi-tape.c Message-ID: <20080417195338.257a1df2@fabiankeil.de> In-Reply-To: <200804171229.m3HCTaG4089203@repoman.freebsd.org> References: <200804171229.m3HCTaG4089203@repoman.freebsd.org>
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[-- Attachment #1 --] Søren Schmidt <sos@FreeBSD.org> wrote: > sos 2008-04-17 12:29:36 UTC > > FreeBSD src repository > > Modified files: > sys/dev/ata ata-all.c ata-all.h ata-chipset.c > ata-disk.c ata-dma.c ata-lowlevel.c > ata-pci.c ata-queue.c ata-raid.c > atapi-cam.c atapi-cd.c atapi-fd.c > atapi-tape.c > Log: > Go back to preallocating everything possible on init. > This avoids calling busdma in the request processing path which caused > a traumatic performance degradation. Allocation has be postponed to > after we know how many devices we possible can have on portmulitpliers > to save some space. With this commit, I'm getting a page fault in bus_dmamap_load() reached through ata_dmaload(), right after ad1 is detected: http://www.fabiankeil.de/tmp/freebsd/ata-bus-dmamap-load-page-fault-600x383.jpg http://www.fabiankeil.de/tmp/freebsd/ata-bus-dmamap-load-page-fault-where-600x440.jpg Fabian [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (FreeBSD) iEYEARECAAYFAkgHjqIACgkQBYqIVf93VJ2kNQCgsWeJuDmjFXGu5ok8/Xp/M2X5 /eIAnRscYkC5SskAmNCF0dNG0Opqzsnw =xoXV -----END PGP SIGNATURE-----
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