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drm/i915: Avoid allocating a page array for the gpu coredump
The gpu coredump typically takes place in a dma_fence signalling critical path, and hence can't use GFP_KERNEL allocations, as that means we might hit deadlocks under memory pressure. However changing to __GFP_KSWAPD_RECLAIM which will be done in an upcoming patch will instead mean a lower chance of the allocation succeeding. In particular large contigous allocations like the coredump page vector. Remove the page vector in favor of a linked list of single pages. Use the page lru list head as the list link, as the page owner is allowed to do that. Signed-off-by: Thomas Hellström <[email protected]> Reviewed-by: Ramalingam C <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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Thomas Hellström
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Nov 26, 2021
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