Sir, We found the performance will be bad on desktop environment with OpenSUSE15 UEFI installation if remove "arch_io_reserve_memtype_wc". Regards, Y.C. Chen -----Original Message----- From: dri-devel [mailto:dri-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Jean Delvare Sent: Thursday, November 08, 2018 8:05 PM To: Dave Airlie <airlied@xxxxxxxxxx> Cc: Christian König <christian.koenig@xxxxxxx>; dri-devel@xxxxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx Subject: Re: Performance regression in ast drm driver On Thu, 1 Nov 2018 16:27:07 +0100, Jean Delvare wrote: > Hi David, > > The following commit: > > commit 7cf321d118a825c1541b43ca45294126fd474efa > Author: Dave Airlie > Date: Mon Oct 24 15:37:48 2016 +1000 > > drm/drivers: add support for using the arch wc mapping API. > > is causing a huge performance regression for the ast drm driver. In a > text console, if I call "cat" on a large text file, it takes almost > twice as much time to be displayed and scrolled completely. > > Can you please check that the ast driver portion of that commit is > both correct and complete? And in the meantime, what bad will happen if we just revert the ast portion of that commit? Thanks, -- Jean Delvare SUSE L3 Support _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
