From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5FCB2FBEA for ; Thu, 1 Jun 2023 13:28:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E09ECC433D2; Thu, 1 Jun 2023 13:28:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1685626120; bh=V5XCCy1Y5T06uGJ0Mn5XJxdSzPZaj3Ua39Jf+spkDnE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ubRHO8n57ENgQo2O/NVsl9wOJQ2n/IbOsxKhVGX2UpsYB38d7dpddqZUaHb/NIOku 4947S9c3EBKsC2GP5aSt7WP3DWisH9hcmS11uKoUSCSo1lJN/Z5FWf7Qjv/OEm44vf vu0OUaAqo7LViPCDeCAKiFbrlZhGcygZkRDTX0Vc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Anuj Gupta , Kanchan Joshi , Jens Axboe Subject: [PATCH 6.1 38/42] block: fix bio-cache for passthru IO Date: Thu, 1 Jun 2023 14:21:47 +0100 Message-Id: <20230601131940.761752786@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230601131939.051934720@linuxfoundation.org> References: <20230601131939.051934720@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Anuj Gupta commit 46930b7cc7727271c9c27aac1fdc97a8645e2d00 upstream. commit <8af870aa5b847> ("block: enable bio caching use for passthru IO") introduced bio-cache for passthru IO. In case when nr_vecs are greater than BIO_INLINE_VECS, bio and bvecs are allocated from mempool (instead of percpu cache) and REQ_ALLOC_CACHE is cleared. This causes the side effect of not freeing bio/bvecs into mempool on completion. This patch lets the passthru IO fallback to allocation using bio_kmalloc when nr_vecs are greater than BIO_INLINE_VECS. The corresponding bio is freed during call to blk_mq_map_bio_put during completion. Cc: stable@vger.kernel.org # 6.1 fixes <8af870aa5b847> ("block: enable bio caching use for passthru IO") Signed-off-by: Anuj Gupta Signed-off-by: Kanchan Joshi Link: https://lore.kernel.org/r/20230523111709.145676-1-anuj20.g@samsung.com Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- block/blk-map.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/block/blk-map.c +++ b/block/blk-map.c @@ -246,7 +246,7 @@ static struct bio *blk_rq_map_bio_alloc( { struct bio *bio; - if (rq->cmd_flags & REQ_POLLED) { + if (rq->cmd_flags & REQ_POLLED && (nr_vecs <= BIO_INLINE_VECS)) { blk_opf_t opf = rq->cmd_flags | REQ_ALLOC_CACHE; bio = bio_alloc_bioset(NULL, nr_vecs, opf, gfp_mask,