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drm/i915: Allow internal page allocations to fail
Internal objects consistent of scratch pages not subject to the persistence guarantees of user facing objects. They are used for example, in ring buffers where they are only required for temporary storage of commands that will be rewritten every time. As they are temporary constructs, quietly report -ENOMEM back along the callchain rather than subject the system to oomkiller if an allocation fails. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Matthew Auld <matthew.auld@intel.com> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171215101753.1519-1-chris@chris-wilson.co.uk
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1 changed files with 3 additions and 1 deletions
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@ -27,6 +27,7 @@
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#include "i915_drv.h"
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#define QUIET (__GFP_NORETRY | __GFP_NOWARN)
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#define MAYFAIL (__GFP_RETRY_MAYFAIL | __GFP_NOWARN)
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/* convert swiotlb segment size into sensible units (pages)! */
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#define IO_TLB_SEGPAGES (IO_TLB_SEGSIZE << IO_TLB_SHIFT >> PAGE_SHIFT)
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@ -95,7 +96,8 @@ static int i915_gem_object_get_pages_internal(struct drm_i915_gem_object *obj)
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struct page *page;
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do {
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page = alloc_pages(gfp | (order ? QUIET : 0), order);
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page = alloc_pages(gfp | (order ? QUIET : MAYFAIL),
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order);
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if (page)
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break;
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if (!order--)
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