From nobody Sun May 24 17:51:29 2026 Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) (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 E6E886FBF for ; Sun, 24 May 2026 13:02:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.69.126.157 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779627771; cv=none; b=U+xPM4jWnJmAjNaCtViXH5KQCYovQYa53oGdkzweaAHsliM3boXx1cenyqhTJdlavS85T0/eI8bT+yzNvE8EuxV/w7hpqWKB7QCxA70DE7pwAq8T8W6gASXGmTdHQrITqGPMFNDIVne18AdjfUPKdoDMtPD5s/6bIOOCRKgTZ24= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779627771; c=relaxed/simple; bh=NgBNT9AIOOUVSWGGqEvxtckRPg378R8UfWorkSLhf1w=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=IWC/eca+XEFL7FyVUmNY+gN6M9ls4k4OM+wJ9rd0cJOMdd8ieG1nbRV38l+kvkksPhdGAZPrR7doif5N3vCgnKPp5YRtdQNplvumWcvdelJAqrON7BMKO7WWELMoNRDc2ePdNnmG5CEmcJ+1KYIVNODXYzF5oiYp+GwGnEV/tfA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net; spf=pass smtp.mailfrom=weissschuh.net; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b=K74Dwr/3; arc=none smtp.client-ip=159.69.126.157 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b="K74Dwr/3" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1779627767; bh=NgBNT9AIOOUVSWGGqEvxtckRPg378R8UfWorkSLhf1w=; h=From:Date:Subject:To:Cc:From; b=K74Dwr/3mbARtDaSYNJJY/CaqJbn6oSpAnVTsAzP9wmnaNqrHS98yfpkHW1LAL3fz 8h3NAH0HCz0ZQFONoq7Jlhn4hW8ixdiadyNGNeB9zxoJ7j9YY3OWrQ6E/erPeecB96 fSuEqaKWprVlT1nsNo9wHvvH9I7FN+11WYlwFgyA= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Sun, 24 May 2026 15:02:45 +0200 Subject: [PATCH] lib: kunit_iov_iter: repeatedly call alloc_pages_bulk() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260524-kunit_iov_iter-alloc_bulk-v1-1-4ad7cbacb19c@weissschuh.net> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/yXMTQrCMBBA4auUWRtopzgFryIS2nHUsSGR/BSh9 O6mdvkt3lshSVRJcGlWiLJo0uArulMD/Br9U4zeqwFbpPaMvZmL12w1LFazRDM6F9hOxc1moKF DIiRhhtp/ojz0+39fb4dTmd7CeR/Ctv0A4a32pX0AAAA= X-Change-ID: 20260523-kunit_iov_iter-alloc_bulk-767126626ecc To: "Christian A. Ehrhardt" , Andrew Morton Cc: linux-kernel@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1779627767; l=1459; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=NgBNT9AIOOUVSWGGqEvxtckRPg378R8UfWorkSLhf1w=; b=Ca81w1S036ixLY6o9ISSOg0quuT9o9v390qzVfbH7FxkWK/cxsR6jiIyq5UJlyiBSuzNJlsgV X1oq/7n6ZIwDy9qxU/+N4kwcdqNWy4yOYhc+1QkI5SUGmXAEpdlLgmk X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= alloc_pages_bulk() is not guaranteed to return all requested pages in a single call. Call it repeatedly until all pages have been allocated or no more progress is being made. Fixes: 0913b7554726 ("lib: kunit_iov_iter: add tests for extract_iter_to_sg= ") Signed-off-by: Thomas Wei=C3=9Fschuh --- lib/tests/kunit_iov_iter.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/lib/tests/kunit_iov_iter.c b/lib/tests/kunit_iov_iter.c index f02f7b7aa796..1e6fce9cb255 100644 --- a/lib/tests/kunit_iov_iter.c +++ b/lib/tests/kunit_iov_iter.c @@ -53,7 +53,7 @@ static void *__init iov_kunit_create_buffer(struct kunit = *test, size_t npages) { struct page **pages; - unsigned long got; + unsigned long got, last; void *buffer; unsigned int i; =20 @@ -61,7 +61,15 @@ static void *__init iov_kunit_create_buffer(struct kunit= *test, KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pages); *ppages =3D pages; =20 - got =3D alloc_pages_bulk(GFP_KERNEL, npages, pages); + got =3D 0; + while (true) { + last =3D got; + got =3D alloc_pages_bulk(GFP_KERNEL, npages, pages); + + if (last =3D=3D got || got =3D=3D npages) + break; + } + if (got !=3D npages) { release_pages(pages, got); kvfree(pages); --- base-commit: 79bd2dded182b1d458b18e62684b7f82ffc682e5 change-id: 20260523-kunit_iov_iter-alloc_bulk-767126626ecc Best regards, -- =20 Thomas Wei=C3=9Fschuh