drm/amdgpu: Allocate coredump ring buffers per ring

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Allocate each ring buffer separately. A single allocation summing all
ring sizes can exceed the page allocator's MAX_ORDER limit and fail;
per-ring buffers stay small enough to satisfy. The existing allocation
style doesn't capture any ring data if the huge allocation fails.
Splitting into multiple allocations helps to capture as much data as
possible for the core dump.

A failed ring is left with a NULL buffer and skipped when formatting.

Fixes: eea85914d1 ("drm/amdgpu: save ring content before resetting the device")
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Assisted-by: Claude Code
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Lijo Lazar 2026-07-29 16:23:58 +05:30 • committed by Alex Deucher

parent 74d48bd6b7

commit 3e8e92b789

2 changed files with 27 additions and 26 deletions

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50

drivers/gpu/drm/amd/amdgpu/amdgpu_dev_coredump.c

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3

drivers/gpu/drm/amd/amdgpu/amdgpu_dev_coredump.h

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