Chris Wilson 4e6fdafa7a drm/i915: Use pagecache write to prepopulate shmemfs from pwrite-ioctl ... Before we instantiate/pin the backing store for our use, we can prepopulate the shmemfs filp efficiently using a write into the pagecache. We avoid the penalty of instantiating all the pages, important if the user is just writing to a few and never uses the object on the GPU, and using a direct write into shmemfs allows it to avoid the cost of retrieving a page (mostly the clear-before-use, but in theory we could curtail swapin) before it is overwritten. This can be extended later to provide additional specialisation for other backends (other than shmemfs). For now it provides a defense against very large write-only allocations from exhausting all of system memory. v2: Smelling fixes. Fixes: fe115628d5 ("drm/i915: Implement pwrite without struct-mutex") References: https://bugs.freedesktop.org/show_bug.cgi?id=99107 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Matthew Auld <matthew.william.auld@gmail.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Cc: <stable@vger.kernel.org> # v4.10+ Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170307120338.7277-2-chris@chris-wilson.co.uk (cherry picked from commit 7c55e2c577) Signed-off-by: Jani Nikula <jani.nikula@intel.com>		2017-03-09 10:46:07 +02:00
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drm	drm/i915: Use pagecache write to prepopulate shmemfs from pwrite-ioctl	2017-03-09 10:46:07 +02:00
host1x	gpu: host1x: Set OF node for new host1x devices	2017-01-30 11:47:44 +01:00
ipu-v3	gpu: ipu-v3: Stop overwriting pdev->dev.of_node of child devices	2017-02-17 08:04:27 +01:00
vga	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
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