Am Freitag, dem 26.01.2024 um 17:46 +0100 schrieb Lucas Stach:
> The etnaviv devcoredump is created in the GPU reset path, which
> must make forward progress to avoid stalling memory reclaim on
> unsignalled dma fences. The currently used __GFP_NORETRY does not
> prohibit sleeping on direct reclaim, breaking the forward progress
> guarantee. Switch to GFP_NOWAIT, which allows background reclaim
> to be triggered, but avoids any stalls waiting for direct reclaim.
>
Any takers for reviewing this one?
Regards,
Lucas
> Signed-off-by: Lucas Stach <l.st...@pengutronix.de>
> ---
> drivers/gpu/drm/etnaviv/etnaviv_dump.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_dump.c
> b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
> index 898f84a0fc30c..42c5028872d54 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_dump.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
> @@ -159,8 +159,7 @@ void etnaviv_core_dump(struct etnaviv_gem_submit *submit)
> file_size += sizeof(*iter.hdr) * n_obj;
>
> /* Allocate the file in vmalloc memory, it's likely to be big */
> - iter.start = __vmalloc(file_size, GFP_KERNEL | __GFP_NOWARN |
> - __GFP_NORETRY);
> + iter.start = __vmalloc(file_size, GFP_NOWAIT | __GFP_NOWARN);
> if (!iter.start) {
> mutex_unlock(&submit->mmu_context->lock);
> dev_warn(gpu->dev, "failed to allocate devcoredump file\n");
> @@ -230,5 +229,6 @@ void etnaviv_core_dump(struct etnaviv_gem_submit *submit)
>
> etnaviv_core_dump_header(&iter, ETDUMP_BUF_END, iter.data);
>
> - dev_coredumpv(gpu->dev, iter.start, iter.data - iter.start, GFP_KERNEL);
> + dev_coredumpv(gpu->dev, iter.start, iter.data - iter.start,
> + GFP_NOWAIT | __GFP_NOWARN);
> }
