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[SYCL] fix flash_attention crash for Qwen3-Coder #21377

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Merged
ggerganov merged 1 commit into from
Apr 6, 2026
Merged

[SYCL] fix flash_attention crash for Qwen3-Coder #21377

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10 changes: 10 additions & 0 deletions ggml/src/ggml-sycl/fattn-tile.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1252,6 +1252,16 @@ static void launch_fattn_tile_switch_ncols1(ggml_backend_sycl_context & ctx, ggm
return;
}

{
constexpr int cols_per_block = ncols2*2;
const int nwarps = ggml_sycl_fattn_tile_get_nthreads (DKQ, DV, cols_per_block, cc) / warp_size;
const int nbatch_fa = ggml_sycl_fattn_tile_get_nbatch_fa(DKQ, DV, cols_per_block, cc);
launch_fattn<DV, cols_per_block/ncols2, ncols2,
flash_attn_tile<DKQ, DV, cols_per_block / ncols2, ncols2, use_logit_softcap, warp_size>, warp_size>
(ctx, dst, nwarps, nbytes_shared, nbatch_fa, true, true, false);
return;
}

GGML_ABORT("fatal error");
}

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