From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2E682C433F5 for ; Thu, 6 Jan 2022 07:04:25 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A83A26B0072; Thu, 6 Jan 2022 02:04:24 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A33756B0074; Thu, 6 Jan 2022 02:04:24 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8FA906B0075; Thu, 6 Jan 2022 02:04:24 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0005.hostedemail.com [216.40.44.5]) by kanga.kvack.org (Postfix) with ESMTP id 801996B0072 for ; Thu, 6 Jan 2022 02:04:24 -0500 (EST) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 31DA3181AEF1E for ; Thu, 6 Jan 2022 07:04:24 +0000 (UTC) X-FDA: 78998973648.21.803AE70 Received: from esa.hc5016-32.iphmx.com (esa.hc5016-32.iphmx.com [207.54.81.235]) by imf22.hostedemail.com (Postfix) with ESMTP id 150F7C0011 for ; Thu, 6 Jan 2022 07:04:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=harman.com; i=@harman.com; q=dns/txt; s=CES-HARMAN1; t=1641452664; x=1672988664; h=from:to:subject:date:message-id:mime-version; bh=2xYjoCcbR0kjGUzXi5Inh+QPm2CUwmwz6dNw90jTBnI=; b=OgsVVaakwFggZMG/PL8EtGKmUPb4O5ghFKpWCjukbU9WN9oYpppLH+3e gw7N2Pw62GS6h4rIQnctDGvkQRr1QwOhKVymy7SXxGW7jEsnY2KXbV2gi cGszx639pA6ddEXAnJqDbbnirImmDTQPoBoutOcmP5j15yyFI1eEDfrTa RuQwj3eKClDDrI5EKv4UhqyMOom+1vJkNnFkEadGTzk8ZO11TUStLLvk/ ji7ijjoLnPMHocUcUrgmvEU5tOnhT9lyb0vrU38ZSX/2A2ph1O95sOjyJ nd9Yvzace5LTNl1lq86fy7hxPxE68O2Ji3i6bWQoTWhSfgu4bUTve2DvT w==; IronPort-SDR: XZtMlK8zkBT1tVoWOMpAu0KjYsbDGiAT+G4/76xm2OI6angd2XXG1DG0+pWKSZ9WBxCW5jRTUA iBS5k3784YCYVTz+9MYEHqWStAyp2wSfTM2rx9cpB7K2aJBuV7Uwx6V4LC+7Y5PMZPepsuJHjE S0EF/OWA66Y+HO6z1sAJ4bEaWWw5qjn1ObYhU5M2IPGzsSbbKPcc0AC24arJPCQYjN72WAiLxw 4iINkhACQG719D0lPhLtaE5VYOurzUGoSLwDoWgGKXro2mRNe5TgYNwfuDVzQb5iMy54fcmRjp k4u0FCYJSSwHELP81ZPWBtu5 X-IronPort-AV: E=McAfee;i="6200,9189,10217"; a="23699101" X-IronPort-AV: E=Sophos;i="5.88,266,1635220800"; d="scan'208,217";a="23699101" X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from unknown (HELO HIBDWSMB09.ad.harman.com) ([202.45.6.41]) by esa6.hc5016-32.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES256-SHA384; 06 Jan 2022 02:04:21 -0500 Received: from HIBDWSMB01.ad.harman.com (10.99.236.91) by HIBDWSMB09.ad.harman.com (10.99.236.103) with Microsoft SMTP Server (TLS) id 15.0.1497.26; Thu, 6 Jan 2022 12:34:18 +0530 Received: from HIBDWSMB03.ad.harman.com (10.99.236.93) by HIBDWSMB01.ad.harman.com (10.99.236.91) with Microsoft SMTP Server (TLS) id 15.0.1497.26; Thu, 6 Jan 2022 12:34:17 +0530 Received: from HIBDWSMB03.ad.harman.com ([fe80::c93:57c:9471:3348]) by HIBDWSMB03.ad.harman.com ([fe80::c93:57c:9471:3348%13]) with mapi id 15.00.1497.026; Thu, 6 Jan 2022 12:34:17 +0530 From: "Ranjan, Vikash" To: "linux-mm@kvack.org" Subject: memory_block_size reduction in memory hot plug, can we reduced it to 1GB,currently it is 4GB Thread-Topic: memory_block_size reduction in memory hot plug, can we reduced it to 1GB,currently it is 4GB Thread-Index: AdgCyyD/Gqj24oU1T+KBj4FGZr412A== Date: Thu, 6 Jan 2022 07:04:16 +0000 Message-ID: <14101f99fda548dc960e2041a6807536@HIBDWSMB03.ad.harman.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.99.236.43] Content-Type: multipart/mixed; boundary="_004_14101f99fda548dc960e2041a6807536HIBDWSMB03adharmancom_" MIME-Version: 1.0 X-Rspamd-Queue-Id: 150F7C0011 X-Stat-Signature: xh6463ji61dg6mbpbp16fi3y1wimwjz8 Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=harman.com header.s=CES-HARMAN1 header.b=OgsVVaak; dmarc=pass (policy=reject) header.from=harman.com; spf=pass (imf22.hostedemail.com: domain of Vikash.Ranjan@harman.com designates 207.54.81.235 as permitted sender) smtp.mailfrom=Vikash.Ranjan@harman.com X-Rspamd-Server: rspam02 X-HE-Tag: 1641452661-177430 X-Bogosity: Ham, tests=bogofilter, spamicity=0.033985, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: --_004_14101f99fda548dc960e2041a6807536HIBDWSMB03adharmancom_ Content-Type: multipart/alternative; boundary="_000_14101f99fda548dc960e2041a6807536HIBDWSMB03adharmancom_" --_000_14101f99fda548dc960e2041a6807536HIBDWSMB03adharmancom_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hello Kernel Memory Team, We are trying to enable memory hot plug for our device's based on arm64, is= it possible to reduce memory_block_size to 1 GB or lesser as currently it = is 4GB. If you have any info on updated patch or any other way we can do this, plea= se let us know. After applying attached test patch (for reduction of memory_block_size to = 1 GB),we are getting below error. Probe is working fine in case of 4GB. root@sys:/sys/devices/system/memory# echo 0x980000000 > /sys/devices/syst= em/memory/probe echo: write error Thanks, Vikash --_000_14101f99fda548dc960e2041a6807536HIBDWSMB03adharmancom_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

  Hello Kernel Memory Team,

 

 

We are trying to enable memory hot plug for our devi= ce's based on arm64, is it possible to reduce memory_block_size to 1 GB or = lesser as currently it is 4GB.

 

If you have any info on updated patch or any other w= ay we can do this, please let us know.

 After applying attached test patch (for reduct= ion of memory_block_size to 1 GB),we are getting below error. Probe is work= ing fine in case of 4GB.

 root@sys:/sys/devices/system/memory# echo 0x98= 0000000  > /sys/devices/system/memory/probe

echo: write error

 

Thanks,

Vikash

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