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Peter Anvin" , Christoph Hellwig , Matthew Wilcox , Mel Gorman , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mike Rapoport Subject: [PATCH 2/2] x86/Kconfig: deprecate DISCONTIGMEM support for 32-bit Date: Wed, 24 Apr 2019 16:24:12 +0300 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1556112252-9339-1-git-send-email-rppt@linux.ibm.com> References: <1556112252-9339-1-git-send-email-rppt@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19042413-0020-0000-0000-0000033411ED X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19042413-0021-0000-0000-00002186776A Message-Id: <1556112252-9339-3-git-send-email-rppt@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-04-24_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=13 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=795 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904240105 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Mel Gorman says: 32-bit NUMA systems should be non-existent in practice. The last NUMA system I'm aware of that was both NUMA and 32-bit only died somewhere between 2004 and 2007. If someone is running a 64-bit capable system in 32-bit mode with NUMA, they really are just punishing themselves for fun. Mark DISCONTIGMEM broken for now and remove it in a couple of releases. Suggested-by: Christoph Hellwig Suggested-by: Mel Gorman Signed-off-by: Mike Rapoport Acked-by: Mel Gorman --- arch/x86/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 5662a3e..bd6f93c 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1606,8 +1606,9 @@ config ARCH_FLATMEM_ENABLE depends on X86_32 && !NUMA config ARCH_DISCONTIGMEM_ENABLE - def_bool y + def_bool n depends on NUMA && X86_32 + depends on BROKEN config ARCH_SPARSEMEM_ENABLE def_bool y