Chris Wilson e22d8e3c69 drm/i915: Treat WC a separate cache domain ... When discussing a new WC mmap, we based the interface upon the assumption that GTT was fully coherent. How naive! Commits 3b5724d702 ("drm/i915: Wait for writes through the GTT to land before reading back") and ed4596ea99 ("drm/i915/guc: WA to address the Ringbuffer coherency issue") demonstrate that writes through the GTT are indeed delayed and may be overtaken by direct WC access. To be safe, if userspace is mixing WC mmaps with other potential GTT access (pwrite, GTT mmaps) it should use set_domain(WC). Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96563 Testcase: igt/gem_pwrite/small-gtt* Testcase: igt/drv_selftest/coherency Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170412110111.26626-2-chris@chris-wilson.co.uk		2017-04-12 12:35:17 +01:00
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acpi
asm-generic	vmlinux.lds: add missing VMLINUX_SYMBOL macros	2017-04-08 00:47:48 -07:00
clocksource
crypto
drm	Merge tag 'drm-misc-next-2017-04-07' of git://anongit.freedesktop.org/git/drm-misc into drm-next	2017-04-11 07:41:10 +10:00
dt-bindings
keys
kvm	KVM: arm64: Ensure LRs are clear when they should be	2017-04-04 14:33:58 +02:00
linux	Linux 4.11-rc6	2017-04-11 07:40:42 +10:00
math-emu
media
memory
misc
net	sctp: get sock from transport in sctp_transport_update_pmtu	2017-04-05 07:20:06 -07:00
pcmcia
ras
rdma	IB/core: Restore I/O MMU, s390 and powerpc support	2017-03-24 21:51:16 -04:00
rxrpc
scsi
soc
sound
target	target: fix ALUA transition timeout handling	2017-03-18 14:47:28 -07:00
trace
uapi	drm/i915: Treat WC a separate cache domain	2017-04-12 12:35:17 +01:00
video	Linux 4.11-rc4	2017-03-28 17:34:19 +10:00
xen
Kbuild