linux-kernel - [PATCH AUTOSEL 5.0 015/262] memblock: memblock_phys_alloc_try

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Date:   Wed, 27 Mar 2019 13:57:50 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Mike Rapoport <rppt@...ux.ibm.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Christophe Leroy <christophe.leroy@....fr>,
        Christoph Hellwig <hch@....de>,
        "David S. Miller" <davem@...emloft.net>,
        Dennis Zhou <dennis@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Greentime Hu <green.hu@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guan Xuetao <gxt@....edu.cn>, Guo Ren <guoren@...nel.org>,
        Guo Ren <ren_guo@...ky.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Juergen Gross <jgross@...e.com>,
        Mark Salter <msalter@...hat.com>,
        Matt Turner <mattst88@...il.com>,
        Max Filippov <jcmvbkbc@...il.com>,
        Michal Simek <monstr@...str.eu>,
        Paul Burton <paul.burton@...s.com>,
        Petr Mladek <pmladek@...e.com>,
        Richard Weinberger <richard@....at>,
        Rich Felker <dalias@...c.org>,
        Rob Herring <robh+dt@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Stafford Horne <shorne@...il.com>,
        Tony Luck <tony.luck@...el.com>,
        Vineet Gupta <vgupta@...opsys.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Sasha Levin <sashal@...nel.org>, linuxppc-dev@...ts.ozlabs.org,
        linux-mm@...ck.org
Subject: [PATCH AUTOSEL 5.0 015/262] memblock: memblock_phys_alloc_try_nid(): don't panic

From: Mike Rapoport <rppt@...ux.ibm.com>

[ Upstream commit 337555744e6e39dd1d87698c6084dd88a606d60a ]

The memblock_phys_alloc_try_nid() function tries to allocate memory from
the requested node and then falls back to allocation from any node in
the system.  The memblock_alloc_base() fallback used by this function
panics if the allocation fails.

Replace the memblock_alloc_base() fallback with the direct call to
memblock_alloc_range_nid() and update the memblock_phys_alloc_try_nid()
callers to check the returned value and panic in case of error.

Link: http://lkml.kernel.org/r/1548057848-15136-7-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
Acked-by: Michael Ellerman <mpe@...erman.id.au>		[powerpc]
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Christophe Leroy <christophe.leroy@....fr>
Cc: Christoph Hellwig <hch@....de>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Dennis Zhou <dennis@...nel.org>
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Greentime Hu <green.hu@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Guan Xuetao <gxt@....edu.cn>
Cc: Guo Ren <guoren@...nel.org>
Cc: Guo Ren <ren_guo@...ky.com>				[c-sky]
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: Juergen Gross <jgross@...e.com>			[Xen]
Cc: Mark Salter <msalter@...hat.com>
Cc: Matt Turner <mattst88@...il.com>
Cc: Max Filippov <jcmvbkbc@...il.com>
Cc: Michal Simek <monstr@...str.eu>
Cc: Paul Burton <paul.burton@...s.com>
Cc: Petr Mladek <pmladek@...e.com>
Cc: Richard Weinberger <richard@....at>
Cc: Rich Felker <dalias@...c.org>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Rob Herring <robh@...nel.org>
Cc: Russell King <linux@...linux.org.uk>
Cc: Stafford Horne <shorne@...il.com>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Vineet Gupta <vgupta@...opsys.com>
Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/mm/numa.c   | 4 ++++
 arch/powerpc/mm/numa.c | 4 ++++
 mm/memblock.c          | 4 +++-
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
index ae34e3a1cef1..2c61ea4e290b 100644
--- a/arch/arm64/mm/numa.c
+++ b/arch/arm64/mm/numa.c
@@ -237,6 +237,10 @@ static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn)
 		pr_info("Initmem setup node %d [<memory-less node>]\n", nid);
 
 	nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
+	if (!nd_pa)
+		panic("Cannot allocate %zu bytes for node %d data\n",
+		      nd_size, nid);
+
 	nd = __va(nd_pa);
 
 	/* report and initialize */
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 87f0dd004295..8ec2ed30d44c 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -788,6 +788,10 @@ static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn)
 	int tnid;
 
 	nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
+	if (!nd_pa)
+		panic("Cannot allocate %zu bytes for node %d data\n",
+		      nd_size, nid);
+
 	nd = __va(nd_pa);
 
 	/* report and initialize */
diff --git a/mm/memblock.c b/mm/memblock.c
index ea31045ba704..d5923df56acc 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1342,7 +1342,9 @@ phys_addr_t __init memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t ali
 
 	if (res)
 		return res;
-	return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
+	return memblock_alloc_range_nid(size, align, 0,
+					MEMBLOCK_ALLOC_ACCESSIBLE,
+					NUMA_NO_NODE, MEMBLOCK_NONE);
 }
 
 /**
-- 
2.19.1