From: Anthony Yznaga Date: Thu, 23 Feb 2023 00:33:12 +0000 (-0800) Subject: padata: use alignment when calculating the number of worker threads X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=f84155ca851849e5e8981fddd3945a6cfeea220c;p=linux.git padata: use alignment when calculating the number of worker threads For multithreaded jobs the computed chunk size is rounded up by the caller-specified alignment. However, the number of worker threads to use is computed using the minimum chunk size without taking alignment into account. A sufficiently large alignment value can result in too many worker threads being allocated for the job. Signed-off-by: Anthony Yznaga Acked-by: Daniel Jordan Signed-off-by: Herbert Xu --- diff --git a/kernel/padata.c b/kernel/padata.c index 106d08ee9ce2e..222d60195de66 100644 --- a/kernel/padata.c +++ b/kernel/padata.c @@ -491,7 +491,7 @@ void __init padata_do_multithreaded(struct padata_mt_job *job) return; /* Ensure at least one thread when size < min_chunk. */ - nworks = max(job->size / job->min_chunk, 1ul); + nworks = max(job->size / max(job->min_chunk, job->align), 1ul); nworks = min(nworks, job->max_threads); if (nworks == 1) {