Commit f84155ca authored by Anthony Yznaga's avatar Anthony Yznaga Committed by Herbert Xu
Browse files

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: default avatarAnthony Yznaga <anthony.yznaga@oracle.com>
Acked-by: default avatarDaniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 1e620445

kernel/padata.c

+1 −1
Original line number Diff line number Diff line
@@ -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) {