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Thu, 28 Mar 2019 21:52:31 +0000 (UTC) (envelope-from allanjude@freebsd.org) Received: from mx1.scaleengine.net (mx1.scaleengine.net [209.51.186.6]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 9FBE88DF53; Thu, 28 Mar 2019 21:52:29 +0000 (UTC) (envelope-from allanjude@freebsd.org) Received: from [10.1.1.2] (Seawolf.HML3.ScaleEngine.net [209.51.186.28]) (Authenticated sender: allanjude.freebsd@scaleengine.com) by mx1.scaleengine.net (Postfix) with ESMTPSA id B90EE1B75D; Thu, 28 Mar 2019 21:52:22 +0000 (UTC) Subject: Re: svn commit: r345491 - in head/sys: conf fs/tmpfs modules/tmpfs To: Cy Schubert , Ian Lepore Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org References: <201903251917.x2PJHTnc068310@slippy.cwsent.com> From: Allan Jude Openpgp: preference=signencrypt Autocrypt: addr=allanjude@freebsd.org; prefer-encrypt=mutual; keydata= mQINBFVwZcYBEADwrZDH0xe0ZVjc9ORCc6PcBLwS/RTXA6NkvpD6ea02pZ8lPOVgteuuugFc D34LdDbiWr+479vfrKBh+Y38GL0oZ0/13j10tIlDMHSa5BU0y6ACtnhupFvVlQ57+XaJAb/q 7qkfSiuxVwQ3FY3PL3cl1RrIP5eGHLA9hu4eVbu+FOX/q/XVKz49HaeIaxzo2Q54572VzIo6 C28McX9m65UL5fXMUGJDDLCItLmehZlHsQQ+uBxvODLFpVV2lUgDR/0rDa0B9zHZX8jY8qQ7 ZdCSy7CwClXI054CkXZCaBzgxYh/CotdI8ezmaw7NLs5vWNTxaDEFXaFMQtMVhvqQBpHkfOD 7rjjOmFw00nJL4FuPE5Yut0CPyx8vLjVmNJSt/Y8WxxmhutsqJYFgYfWl/vaWkrFLur/Zcmz IklwLw35HLsCZytCN5A3rGKdRbQjD6QPXOTJu0JPrJF6t2xFkWAT7oxnSV0ELhl2g+JfMMz2 Z1PDmS3NRnyEdqEm7NoRGXJJ7bgxDbN+9SXTyOletqGNXj/bSrBvhvZ0RQrzdHAPwQUfVSU2 qBhQEi2apSZstgVNMan0GUPqCdbE2zpysg+zT7Yhvf9EUQbzPL4LpdK1llT9fZbrdMzEXvEF oSvwJFdV3sqKmZc7b+E3PuxK6GTsKqaukd/3Cj8aLHG1T1im1QARAQABtCJBbGxhbiBKdWRl IDxhbGxhbmp1ZGVAZnJlZWJzZC5vcmc+iQI/BBMBAgApBQJVcGXGAhsjBQkSzAMABwsJCAcD AgEGFQgCCQoLBBYCAwECHgECF4AACgkQGZU1PhKYC34Muw/+JOKpSfhhysWFYiRXynGRDe07 Z6pVsn7DzrPUMRNZfHu8Uujmmy3p2nx9FelIY9yjd2UKHhug+whM54MiIFs90eCRVa4XEsPR 4FFAm0DAWrrb7qhZFcE/GhHdRWpZ341WAElWf6Puj2devtRjfYbikvj5+1V1QmDbju7cEw5D mEET44pTuD2VMRJpu2yZZzkM0i+wKFuPxlhqreufA1VNkZXI/rIfkYWK+nkXd9Efw3YdCyCQ zUgTUCb88ttSqcyhik/li1CDbXBpkzDCKI6I/8fAb7jjOC9LAtrZJrdgONywcVFoyK9ZN7EN AVA+xvYCmuYhR/3zHWH1g4hAm1v1+gIsufhajhfo8/wY1SetlzPaYkSkVQLqD8T6zZyhf+AN bC7ci44UsiKGAplB3phAXrtSPUEqM86kbnHg3fSx37kWKUiYNOnx4AC2VXvEiKsOBlpyt3dw WQbOtOYM+vkfbBwDtoGOOPYAKxc4LOIt9r+J8aD+gTooi9Eo5tvphATf9WkCpl9+aaGbSixB tUpvQMRnSMqTqq4Z7DeiG6VMRQIjsXDSLJEUqcfhnLFo0Ko/RiaHd5xyAQ4DhQ9QpkyQjjNf /3f/dYG7JAtoD30txaQ5V8uHrz210/77DRRX+HJjEj6xCxWUGvQgvEZf5XXyxeePvqZ+zQyT DX61bYw6w6a5Ag0EVXBlxgEQAMy7YVnCCLN4oAOBVLZ5nUbVPvpUhsdA94/0/P+uqCIh28Cz ar56OCX0X19N/nAWecxL4H32zFbIRyDB2V/MEh4p9Qvyu/j4i1r3Ex5GhOT2hnit43Ng46z5 29Es4TijrHJP4/l/rB2VOqMKBS7Cq8zk1cWqaI9XZ59imxDNjtLLPPM+zQ1yE3OAMb475QwN UgWxTMw8rkA7CEaqeIn4sqpTSD5C7kT1Bh26+rbgJDZ77D6Uv1LaCZZOaW52okW3bFbdozV8 yM2u+xz2Qs8bHz67p+s+BlygryiOyYytpkiK6Iy4N7FTolyj5EIwCuqzfk0SaRHeOKX2ZRjC qatkgoD/t13PNT38V9tw3qZVOJDS0W6WM8VSg+F+bkM9LgJ8CmKV+Hj0k3pfGfYPOZJ/v18i +SmZmL/Uw2RghnwDWGAsPCKu4uZR777iw7n9Io6Vfxndw2dcS0e9klvFYoaGS6H2F13Asygr WBzFNGFQscN4mUW+ZYBzpTOcHkdT7w8WS55BmXYLna+dYer9/HaAuUrONjujukN4SPS1fMJ2 /CS/idAUKyyVVX5vozoNK2JVC1h1zUAVsdnmhEzNPsvBoqcVNfyqBFROEVLIPwq+lQMGNVjH ekLTKRWf59MEhUC2ztjSKkGmwdg73d6xSXMuq45EgIJV2wPvOgWQonoHH/kxABEBAAGJAiUE GAECAA8FAlVwZcYCGwwFCRLMAwAACgkQGZU1PhKYC34w5A//YViBtZyDV5O+SJT9FFO3lb9x Zdxf0trA3ooCt7gdBkdnBM6T5EmjgVZ3KYYyFfwXZVkteuCCycMF/zVw5eE9FL1+zz9gg663 nY9q2F77TZTKXVWOLlOV2bY+xaK94U4ytogOGhh9b4UnQ/Ct3+6aviCF78Go608BXbmF/GVT 7uhddemk7ItxM1gE5Hscx3saxGKlayaOsdPKeGTVJCDEtHDuOc7/+jGh5Zxpk/Hpi+DUt1ot 8e6hPYLIQa4uVx4f1xxxV858PQ7QysSLr9pTV7FAQ18JclCaMc7JWIa3homZQL/MNKOfST0S 2e+msuRwQo7AnnfFKBUtb02KwpA4GhWryhkjUh/kbVc1wmGxaU3DgXYQ5GV5+Zf4kk/wqr/7 KG0dkTz6NLCVLyDlmAzuFhf66DJ3zzz4yIo3pbDYi3HB/BwJXVSKB3Ko0oUo+6/qMrOIS02L s++QE/z7K12CCcs7WwOjfCYHK7VtE0Sr/PfybBdTbuDncOuAyAIeIKxdI2nmQHzl035hhvQX s4CSghsP319jAOQiIolCeSbTMD4QWMK8RL/Pe1FI1jC3Nw9s+jq8Dudtbcj2UwAP/STUEbJ9 5rznzuuhPjE0e++EU/RpWmcaIMK/z1zZDMN+ce2v1qzgV936ZhJ3iaVzyqbEE81gDxg3P+IM kiYh4ZtPB4Q= Message-ID: <730eb214-5e6d-a16c-9f9d-a7ca90b5ca77@freebsd.org> User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.3 MIME-Version: 1.0 In-Reply-To: <201903251917.x2PJHTnc068310@slippy.cwsent.com> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Eq7AemuNwer8zsg8kRxRNlu7YrwmxReJX" Precedence: bulk X-Loop: FreeBSD.org Sender: owner-src-committers@freebsd.org X-Rspamd-Queue-Id: 3E3788DF69 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.97 / 15.00]; local_wl_from(0.00)[freebsd.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.996,0]; NEURAL_HAM_SHORT(-0.97)[-0.970,0]; ASN(0.00)[asn:11403, ipnet:96.47.64.0/20, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] Status: O X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Date: Tue, 03 Sep 2019 14:06:02 -0000 X-Original-Date: Thu, 28 Mar 2019 17:52:17 -0400 X-List-Received-Date: Tue, 03 Sep 2019 14:06:02 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --Eq7AemuNwer8zsg8kRxRNlu7YrwmxReJX Content-Type: multipart/mixed; boundary="BSy5TzBEnR5Vqw0Wdb85v5Xw7TyqeQu40"; protected-headers="v1" From: Allan Jude To: Cy Schubert , Ian Lepore Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Message-ID: <730eb214-5e6d-a16c-9f9d-a7ca90b5ca77@freebsd.org> Subject: Re: svn commit: r345491 - in head/sys: conf fs/tmpfs modules/tmpfs References: <201903251917.x2PJHTnc068310@slippy.cwsent.com> In-Reply-To: <201903251917.x2PJHTnc068310@slippy.cwsent.com> --BSy5TzBEnR5Vqw0Wdb85v5Xw7TyqeQu40 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2019-03-25 15:17, Cy Schubert wrote: > In message <3398a21318a4a6715609004d569d20de86f1dc7a.camel@freebsd.org>= > , Ian Le > pore writes: >> On Mon, 2019-03-25 at 05:42 -0700, Cy Schubert wrote: >>> In message <201903250746.x2P7kKUu019786@repo.freebsd.org>, Allan >>> Jude=20 >>> writes: >>>> Author: allanjude >>>> Date: Mon Mar 25 07:46:20 2019 >>>> New Revision: 345491 >>>> URL: https://svnweb.freebsd.org/changeset/base/345491 >>>> >>>> Log: >>>> Make TMPFS_PAGES_MINRESERVED a kernel option >>>> =20 >>>> TMPFS_PAGES_MINRESERVED controls how much memory is reserved for >>>> the system >>>> and not used by tmpfs. >>>> =20 >>>> On very small memory systems, the default value may be too high >>>> and this >>>> prevents these small memory systems from using reroot, which is >>>> required >>>> for them to install firmware updates. >>>> =20 >>>> Submitted by: Hiroki Mori >>>> Reviewed by: mizhka >>>> Differential Revision: https://reviews.freebsd.org/D13583 >>>> >>>> Modified: >>>> head/sys/conf/options >>>> head/sys/fs/tmpfs/tmpfs.h >>>> head/sys/fs/tmpfs/tmpfs_vfsops.c >>>> head/sys/modules/tmpfs/Makefile >>>> >>> >>> Would this be a good candidate for a sysctl or tuneable? >>> >> >> The small-memory embedded systems most affected by this often don't us= e >> loader(8) at all, so tunables aren't an option, and sysctl may be too >> late. No reason it can't be a tunable as well, but it'll probably nee= d >> to remain as a compile-time option too. >=20 > Yes, I should have been more clear. I can see using a tuneable on a 2=20 > GB or 4 GB Intel pandaboard. (Perfect for a firewall or a UPS=20 > management station.) >=20 >=20 The default value is 4MB. For any system with more than 32mb of memory, it shouldn't require tuning, although you may wish to prevent tmpfs from using all but 4mb of your memory. I think the only case where you definitely need to override the default, is when you have so little memory that you can't create a tmpfs image of your root filesystem to reroot into, as is the case on many tiny router boards, with 8-32mb of ram, and 4-16mb of flash. --=20 Allan Jude --BSy5TzBEnR5Vqw0Wdb85v5Xw7TyqeQu40-- --Eq7AemuNwer8zsg8kRxRNlu7YrwmxReJX Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (MingW32) iQIcBAEBAgAGBQJcnUIWAAoJEBmVNT4SmAt+2x8QALxzOf2UlvsiUEmxMlzYLcmM 4ycHqze/pXT/AbuGu/xrKWoU5LUq4TJrEbVyl5o66RtZTieBTWU6h60zi1FLQcdd 4M9qG5o8blpqFBJWLgUy8fVYyCR9ECpahdc9mzHH+qCwcRtzoFnRDntBomnouXWK pOUrYEIFAnqE5kfgNWkgcBWKM/+8VKTK9DPO7oXzJPrQ06RgL7EY7RYWV+PKZTke gwzmeljlZjhbdyT4Fix0RS+BFjMxNwwnsrxb96tLy4ZrqWsT+5znk2ODqNHHid4V NlvYoMWRFFkBPPxs1c7JxdKJYnEM4Fndzrbru1YQT4L7gLVkeAu3pYf74ha+KjCI Ariz6oizrVBvIIk3T+ADUY+DgadOOVct/5zIhQbfKGl5bcH+TvLZ5Qab/2LuMCxz +hcg5Vgy7+YzLrCq1+rrNuLcebyf7aNX9EghcCxOxW2obWURkWFSJfqJ09KQH/+l e6j7KSchcmyW2C6sCxBUyW6UzkzhLXn5bs8YyusN601EyvXGgwvc/Wf2ZfkQ80vY luFmJ8PbUQUK5FoKcv45StjH8Xh4fK4vZtnl2DXUIiURZPO1TwhgcD02fuReAkuA ELfQXwogo4kDczZxpKzcNAxXrUDukisLA19CLm+1bg8L5+qy51KK/ebAkpDN8kDW bB87+YnuiqEmwS8etKC/ =Ag0V -----END PGP SIGNATURE----- --Eq7AemuNwer8zsg8kRxRNlu7YrwmxReJX--