From nobody Tue Feb 10 07:01:46 2026 Received: from mailrelay4-3.pub.mailoutpod3-cph3.one.com (mailrelay4-3.pub.mailoutpod3-cph3.one.com [46.30.212.3]) (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 9D17225F964 for ; Thu, 26 Jun 2025 08:36:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=46.30.212.3 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750926990; cv=none; b=SlB1bzxAwuty6yk+KCvOBrM/Y3GyyiCkhoaoTkNygnLKhvl8ym8xMfPxyQ5aogpjA4nll6PKv9HaQ7pvq9l+xLelCQJvGttSa751dOSEc3xwmgaYvZ8wPPDsqgbOZ67vMkQSkEFup+6Wd5O5mMvC49XfjIO9jJLGNvZLnKo+OYI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750926990; c=relaxed/simple; bh=gQn4VmqsD0HYtYPDRubHPhoNsnIoIExefHu5TFwwrKk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=I2xXY64SWyEP7ZnRSpj4+bi6JMmeU+ycNr6MnRwRQvSshxDKwjP1nRcPUOHgmcYFrRvuiCBun7CZrI8zsSIhJEPJlqPIsoUjaNHQ3WalREkvpEUAl/RtUGmCRvHF/uiuSMRHJkbtwCGcDiA3rkNK1dVIff7RUWH5AbHl20/ltY0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=konsulko.se; spf=none smtp.mailfrom=konsulko.se; dkim=pass (2048-bit key) header.d=konsulko.se header.i=@konsulko.se header.b=cn5kbwdr; dkim=permerror (0-bit key) header.d=konsulko.se header.i=@konsulko.se header.b=ioaMVepK; arc=none smtp.client-ip=46.30.212.3 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=konsulko.se Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=konsulko.se Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=konsulko.se header.i=@konsulko.se header.b="cn5kbwdr"; dkim=permerror (0-bit key) header.d=konsulko.se header.i=@konsulko.se header.b="ioaMVepK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1750926980; x=1751531780; d=konsulko.se; s=rsa1; h=content-transfer-encoding:mime-version:references:in-reply-to:message-id:date: subject:cc:to:from:from; bh=mkYpvclAYF6uZDEKl93atoHVzEINRICyZlGgMsyMSN8=; b=cn5kbwdrF0U0ijbydoKjcGWYj45rESCFlARBFb3a3xk5AeytbkLXtpXygHIvf+GHnFgyry4H/E8Y/ xa4ralAXWUP6A/CaZV2FHo372ysJfkKEB3JEjlOue5PyXGb9aPlmH5MbOLtrmvSeYZ56CzM/IK6eUv siz7vAWhL/TZRX1bxFAWJCuDwUu6l4v8UshLbqzXQumX51vXO2qt4foDLN0oBPkfc5Mb9f2355CIHl pBvlEekquW7MbiOgGNqfZufFOMp+dRrEhAKob6snl06Pahd9At3Gt1Dv8SYa2CbHn12U+Iip7rjlGz XYHEOZwE51SJ++/fOk0KxyHedYLA6vA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; t=1750926980; x=1751531780; d=konsulko.se; s=ed1; h=content-transfer-encoding:mime-version:references:in-reply-to:message-id:date: subject:cc:to:from:from; bh=mkYpvclAYF6uZDEKl93atoHVzEINRICyZlGgMsyMSN8=; b=ioaMVepK/VgZgirl2GI14/87I/2Zw/jDC/YpwE31muFRDbDmhjKabDOkOwivvYa28cZkBVI+JPEim CtS1W+ZAg== X-HalOne-ID: a129904f-5268-11f0-9ab1-29b2d794c87d Received: from localhost.localdomain (host-90-238-19-233.mobileonline.telia.com [90.238.19.233]) by mailrelay4.pub.mailoutpod3-cph3.one.com (Halon) with ESMTPSA id a129904f-5268-11f0-9ab1-29b2d794c87d; Thu, 26 Jun 2025 08:36:20 +0000 (UTC) From: Vitaly Wool To: linux-mm@kvack.org Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, Uladzislau Rezki , Danilo Krummrich , Alice Ryhl , rust-for-linux@vger.kernel.org, Vitaly Wool Subject: [PATCHi v4 1/4] mm/vmalloc: allow to set node and align in vrealloc Date: Thu, 26 Jun 2025 10:36:17 +0200 Message-Id: <20250626083617.3596326-1-vitaly.wool@konsulko.se> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250626083516.3596197-1-vitaly.wool@konsulko.se> References: <20250626083516.3596197-1-vitaly.wool@konsulko.se> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Reimplement vrealloc() to be able to set node and alignment should a user need to do so. Rename the function to vrealloc_node() to better match what it actually does now and introduce a macro for vrealloc() for backward compatibility. With that change we also provide the ability for the Rust part of the kernel to set node and aligmnent in its allocations. Signed-off-by: Vitaly Wool Reviewed-by: "Uladzislau Rezki (Sony)" --- include/linux/vmalloc.h | 8 +++++--- mm/nommu.c | 3 ++- mm/vmalloc.c | 16 +++++++++++++--- 3 files changed, 20 insertions(+), 7 deletions(-) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index fdc9aeb74a44..7d5251287687 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -197,9 +197,11 @@ extern void *__vcalloc_noprof(size_t n, size_t size, g= fp_t flags) __alloc_size(1 extern void *vcalloc_noprof(size_t n, size_t size) __alloc_size(1, 2); #define vcalloc(...) alloc_hooks(vcalloc_noprof(__VA_ARGS__)) =20 -void * __must_check vrealloc_noprof(const void *p, size_t size, gfp_t flag= s) - __realloc_size(2); -#define vrealloc(...) alloc_hooks(vrealloc_noprof(__VA_ARGS__)) +void *__must_check vrealloc_node_noprof(const void *p, size_t size, + unsigned long align, gfp_t flags, int nid) __realloc_size(2); +#define vrealloc_noprof(p, s, f) vrealloc_node_noprof(p, s, 1, f, NUMA_NO_= NODE) +#define vrealloc_node(...) alloc_hooks(vrealloc_node_noprof(__VA_ARGS__)) +#define vrealloc(...) alloc_hooks(vrealloc_noprof(__VA_ARGS__)) =20 extern void vfree(const void *addr); extern void vfree_atomic(const void *addr); diff --git a/mm/nommu.c b/mm/nommu.c index 87e1acab0d64..6cec05c3312c 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -119,7 +119,8 @@ void *__vmalloc_noprof(unsigned long size, gfp_t gfp_ma= sk) } EXPORT_SYMBOL(__vmalloc_noprof); =20 -void *vrealloc_noprof(const void *p, size_t size, gfp_t flags) +void *vrealloc_node_noprof(const void *p, size_t size, unsigned long align, + gfp_t flags, int nid) { return krealloc_noprof(p, size, (flags | __GFP_COMP) & ~__GFP_HIGHMEM); } diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 6dbcdceecae1..412bf5b8d3ff 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -4089,10 +4089,12 @@ void *vzalloc_node_noprof(unsigned long size, int n= ode) EXPORT_SYMBOL(vzalloc_node_noprof); =20 /** - * vrealloc - reallocate virtually contiguous memory; contents remain unch= anged + * vrealloc_node - reallocate virtually contiguous memory; contents remain= unchanged * @p: object to reallocate memory for * @size: the size to reallocate + * @align: requested alignment * @flags: the flags for the page level allocator + * @nid: node id * * If @p is %NULL, vrealloc() behaves exactly like vmalloc(). If @size is = 0 and * @p is not a %NULL pointer, the object pointed to is freed. @@ -4111,7 +4113,7 @@ EXPORT_SYMBOL(vzalloc_node_noprof); * Return: pointer to the allocated memory; %NULL if @size is zero or in c= ase of * failure */ -void *vrealloc_noprof(const void *p, size_t size, gfp_t flags) +void *vrealloc_node_noprof(const void *p, size_t size, unsigned long align= , gfp_t flags, int nid) { struct vm_struct *vm =3D NULL; size_t alloced_size =3D 0; @@ -4135,6 +4137,13 @@ void *vrealloc_noprof(const void *p, size_t size, gf= p_t flags) if (WARN(alloced_size < old_size, "vrealloc() has mismatched area vs requested sizes (%p)\n", p)) return NULL; + if (WARN(nid !=3D NUMA_NO_NODE && nid !=3D page_to_nid(vmalloc_to_page(p= )), + "vrealloc() has mismatched nids\n")) + return NULL; + if (WARN((uintptr_t)p & (align - 1), + "will not reallocate with a bigger alignment (0x%lx)\n", + align)) + return NULL; } =20 /* @@ -4166,7 +4175,8 @@ void *vrealloc_noprof(const void *p, size_t size, gfp= _t flags) } =20 /* TODO: Grow the vm_area, i.e. allocate and map additional pages. */ - n =3D __vmalloc_noprof(size, flags); + n =3D __vmalloc_node_noprof(size, align, flags, nid, __builtin_return_add= ress(0)); + if (!n) return NULL; =20 --=20 2.39.2