linux-kernel - Re: Linux 2.6.28-rc8

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Date:	Wed, 10 Dec 2008 23:19:23 -0800
From:	Eric Anholt <eric@...olt.net>
To:	Gabriel C <nix.or.die@...glemail.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: Linux 2.6.28-rc8

On Thu, 2008-12-11 at 03:37 +0100, Gabriel C wrote:
> While I got some time again I decided to test rc8 and noticed the following warning :

Unfortunately DRM comes second to the party, so it gets the backtrace
blame, but that framebuffer should really be mapped WC by vesafb.
You're just losing performance for having it mapped UC, and that should
be the only effect other than the whining in the log.

My recommended solution, of course, is to remove vesafb.

> [   23.090942] resource map sanity check conflict: 0xd0000000 0xdfffffff 0xd0000000 0xd07effff vesafb
> [   23.090948] ------------[ cut here ]------------
> [   23.090951] WARNING: at arch/x86/mm/ioremap.c:226 __ioremap_caller+0xc7/0x2c9()
> [   23.090952] Modules linked in: i915 binfmt_misc acpi_cpufreq freq_table w83627ehf hwmon_vid fuse loop lp ppdev joydev i2c_i801 parport_pc button evdev parport intel_agp processor sg pcspkr
> [   23.090969] Pid: 4632, comm: X Not tainted 2.6.28-rc8-dirty #25
> [   23.090971] Call Trace:
> [   23.090976]  [<ffffffff8024106f>] warn_on_slowpath+0x58/0x7d
> [   23.090979]  [<ffffffff8022c255>] ? change_page_attr_set_clr+0x136/0x304
> [   23.090982]  [<ffffffff8022c65b>] ? _set_memory_uc+0x22/0x24
> [   23.090985]  [<ffffffff8022b0a3>] ? ioremap_change_attr+0x18/0x28
> [   23.090989]  [<ffffffff8022b17a>] __ioremap_caller+0xc7/0x2c9
> [   23.090997]  [<ffffffffa00b1e1e>] ? i915_gem_entervt_ioctl+0x451/0x4e6 [i915]
> [   23.091000]  [<ffffffff8022b46c>] ioremap_wc+0x1b/0x27
> [   23.091006]  [<ffffffffa00b1e1e>] i915_gem_entervt_ioctl+0x451/0x4e6 [i915]
> [   23.091010]  [<ffffffff802a8f6f>] ? do_sync_write+0xe7/0x12d
> [   23.091014]  [<ffffffff803e1e36>] drm_ioctl+0x1d6/0x25e
> [   23.091020]  [<ffffffffa00b19cd>] ? i915_gem_entervt_ioctl+0x0/0x4e6 [i915]
> [   23.091024]  [<ffffffff802b55d9>] vfs_ioctl+0x5f/0x78
> [   23.091026]  [<ffffffff802b5984>] do_vfs_ioctl+0x392/0x3c0
> [   23.091030]  [<ffffffff80554049>] ? _spin_unlock+0x9/0x32
> [   23.091033]  [<ffffffff802b5a07>] sys_ioctl+0x55/0x77
> [   23.091036]  [<ffffffff8020c15a>] system_call_fastpath+0x16/0x1b
> [   23.091038] ---[ end trace 79a035f1175c4e1d ]---
> 
> ...
> 
> 
> I'm sure this warning was not present on rc1/rc2 back when I've tested these.
> Also this warning is not present in 2.6.27.*
> 
> 
> Regards,
> 
> Gabriel C
> 
> --
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-- 
Eric Anholt
eric@...olt.net                         eric.anholt@...el.com



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