Date: Tue, 16 Oct 2018 09:55:13 -0700 From: John Baldwin <jhb@FreeBSD.org> To: Leandro Lupori <luporl@FreeBSD.org>, src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: Re: svn commit: r339382 - projects/power8_bringup_hacks/sys/dev/bge Message-ID: <8a90e167-a4ac-c32f-ae9c-d71f0fcb5471@FreeBSD.org> In-Reply-To: <201810161636.w9GGa3Nl001743@repo.freebsd.org> References: <201810161636.w9GGa3Nl001743@repo.freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On 10/16/18 9:36 AM, Leandro Lupori wrote: > Author: luporl > Date: Tue Oct 16 16:36:02 2018 > New Revision: 339382 > URL: https://svnweb.freebsd.org/changeset/base/339382 > > Log: > bge(4): limit DMA address to 2GB > > This is a temporary hack, to avoid POWER8 Broadcom NICs from becoming > unusable after transferring a reasonable amount of data. > The issue is the same as that of AHCI, where DMA addresses above 2GB > do not work and causes PCI errors. Is the issue bge specific or specific to the PCI chipset in these boxes? If the latter, the better approach would be to set the limit in a tag the chipset provides that all child devices would then inherit. -- John Baldwin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?8a90e167-a4ac-c32f-ae9c-d71f0fcb5471>