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b=IQ1b9wxiRyLWKHqw+KxnzMq43qjljDVqd/WO/+7KPyig4hWPh1VKmjmKKkWy8lH5Y dqKRK+jjsUHHhYgbLrv68HFDOiXsmfAYvck2KGHGI+hVLxDrgYgsQ8VKFM8cxqR+0F agAQkMh9sr4/WIiGPgSSFwO6QqjX+DTIE0L/eoYfp2Bs5w423vU6Rr3jNWjheX+Mf9 EE6vu3kBG+pApECzc+82V1HH2lH0QMY3JsLrv9lhQfNNUFSgShmWLiIZFgr9hvumIL hUX++I+joboSxouM4uH4nkcJxIThVoLfkamIptxo3bwdgLdx7cH0DYcviSVYt8pht6 UGhc+KlmTbMlw== From: "Mike Rapoport (Microsoft)" Date: Tue, 26 May 2026 15:50:38 +0300 Subject: [PATCH v2 1/2] lib/raid: use kvmalloc() in calibrate_xor_blocks() MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260526-lib-v2-1-ca3f0fc24b14@kernel.org> References: <20260526-lib-v2-0-ca3f0fc24b14@kernel.org> In-Reply-To: <20260526-lib-v2-0-ca3f0fc24b14@kernel.org> To: Andrew Morton , Song Liu , Yu Kuai , Li Nan , Xiao Ni Cc: David Laight , Mike Rapoport , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-raid@vger.kernel.org X-Mailer: b4 0.15.2 X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: B2FEA1C0008 X-Stat-Signature: eznibf558zzceen1u7i4jhrt5t7g7wky X-HE-Tag: 1779799848-584199 X-HE-Meta: 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 zX6KJ9QW ILgmpB0EdTUvhLPFv7xW3Yg3YFTtUDmI/3vPBFaH5Fu0HtcyermhEBrwlIHiR16w+/CffNbme2aM9HVYOWzUtZYXYKdmim/DjOMEW960nw21nxsB/HopvVvhrk9UlkCS3yr+w55nsdSejBVy5z76oquHIa+wRSGdJp8ceCGJeJyFRSWQYJNo9R83hrRCGG5blOoGQEDlLM0HWiIlNmndD29awKjjN6SjhO2WPO276M6jWY05PdhscS6h8tDbIE3oBgupO95IsX+fdzFEAg7amy03bvOh89UyFPD+4Zsr+6YqQoVIp1BoGlcbx5ubCQoq42jm9BJq/LdjjcbtaC2I3o1nurlcmJcB3ytEOJ5c2NgiqU1GSVN63rguadvFmFoybGhvZTz+rR83B1tWIm/FliL/M+KWGBtly06tZ Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The xor benchmark allocates an order 2 (4 pages) scratch buffer that is used purely as a CPU-only XOR working area. This buffer does not need to be physically contiguous and can be allocated with kvmalloc(). Replace __get_free_pages() call with kvmalloc(). Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com Signed-off-by: Mike Rapoport (Microsoft) --- lib/raid/xor/xor-core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/lib/raid/xor/xor-core.c b/lib/raid/xor/xor-core.c index bd4e6e434418..9f90620617cd 100644 --- a/lib/raid/xor/xor-core.c +++ b/lib/raid/xor/xor-core.c @@ -8,6 +8,7 @@ #include #include +#include #include #include #include @@ -114,7 +115,7 @@ static int __init calibrate_xor_blocks(void) if (forced_template) return 0; - b1 = (void *) __get_free_pages(GFP_KERNEL, 2); + b1 = kvmalloc(PAGE_SIZE * 4, GFP_KERNEL); if (!b1) { pr_warn("xor: Yikes! No memory available.\n"); return -ENOMEM; @@ -132,7 +133,7 @@ static int __init calibrate_xor_blocks(void) pr_info("xor: using function: %s (%d MB/sec)\n", fastest->name, fastest->speed); - free_pages((unsigned long)b1, 2); + kvfree(b1); return 0; } -- 2.53.0