From mboxrd@z Thu Jan 1 00:00:00 1970 From: butterflybytes@gmail.com (Cindy-Sue Causey) Date: Tue, 20 Nov 2018 10:16:41 -0500 Subject: deferred pages In-Reply-To: References: <20181028163329.GA8104@Ubuntu-DTI> <20181028185140.GB8104@Ubuntu-DTI> Message-ID: To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org On 11/1/18, Mulyadi Santosa wrote: > On Mon, Oct 29, 2018 at 1:51 AM Damian Tometzki > wrote: > >> On So, 28. Okt 17:33, Damian Tometzki wrote: >> Hello together, >> >> can anyone me short explain what is deferred page(s) ? >> >> Many thanks >> >> Best regards >> Damian >> > > Hm, did you mean delayed/lazy paging? > -- > regards, > > Mulyadi Santosa > Freelance Linux trainer and consultant Hi.. I just stumbled back upon this while cleaning out my inbox this morning. There's not much mention, under 1,000 possibilities come back, during a search for "deferred paging" in quotation marks. These two sources sound like they might fit the question: #1) Paging Spaces by Tom Farwell; April 2003; IBM Systems Magazine NOTE: Appears to potentially be a popup window that search engine perceived as a regular webpage http://ibmsystemsmag.com/CMSTemplates/IBMSystemsMag/Print.aspx?path=/aix/administrator/systemsmanagement/Paging-Spaces-(1) First reference is near the top under "AIX 4.3.2+ Deferred Paging Space". This is a quick quote that sounds like it might trigger an ah-ha moment for some: "[...] Deferred Page Space Allocation (DPSA) policy. DPSA delays allocating paging space slots until it's necessary to page out the frame to paging space." "DPSA delays allocating" sounds like it falls under your "delayed/lazy" reference. :) And...... #2) AIX 5L Differences Guide Version 5.3 Edition By Scott Vetter, Adrian Demeter, Shiv Dutta, Armin R?ll, SeongLul Son, IBM Redbooks https://books.google.com/books?id=Vrq6AgAAQBAJ&pg=PA180&lpg=PA180&dq=%22deferred+paging%22&source=bl&ots=drDJODUGBq&sig=JXjFdkrGb9ioZFauAoUcRgq7MgM&hl=en&sa=X&ved=2ahUKEwih5umfjuPeAhVyx1kKHdU4DSUQ6AEwA3oECAYQAQ#v=onepage&q=%22deferred%20paging%22&f=false Keywords that help this sound appropriate are "AIX paging space allocation policy and management" within a section titled... "Paging space garbage collection". That provided an explanation that was fairly *cognitively friendly* for me, a user who has never touched on this concept in her own computing petri dish. Well done @ the author(s). :) Posting for the archives. Hope it helps someone someday. :) Cindy :) -- Cindy-Sue Causey Talking Rock, Pickens County, Georgia, USA * I comment, therefore I am... procrastinating elsewhere. Indubitably. * From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ua1-x936.google.com ([2607:f8b0:4864:20::936]) by shelob.surriel.com with esmtps (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.91) (envelope-from ) id 1gP7lb-0001bW-NP for kernelnewbies@kernelnewbies.org; Tue, 20 Nov 2018 10:16:43 -0500 Received: by mail-ua1-x936.google.com with SMTP id z23so770437uam.1 for ; Tue, 20 Nov 2018 07:16:43 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: <20181028163329.GA8104@Ubuntu-DTI> <20181028185140.GB8104@Ubuntu-DTI> From: Cindy-Sue Causey Date: Tue, 20 Nov 2018 10:16:41 -0500 Message-ID: Subject: Re: deferred pages To: Kernel Newbies List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: kernelnewbies-bounces@kernelnewbies.org Message-ID: <20181120151641.hiREb73XgumOTJJ47ATj6Xz2cgb_KlInE8M135xKFn4@z> T24gMTEvMS8xOCwgTXVseWFkaSBTYW50b3NhIDxtdWx5YWRpLnNhbnRvc2FAZ21haWwuY29tPiB3 cm90ZToKPiBPbiBNb24sIE9jdCAyOSwgMjAxOCBhdCAxOjUxIEFNIERhbWlhbiBUb21ldHpraSA8 bGludXhfZHRpQGljbG91ZC5jb20+Cj4gd3JvdGU6Cj4KPj4gT24gU28sIDI4LiBPa3QgMTc6MzMs IERhbWlhbiBUb21ldHpraSB3cm90ZToKPj4gSGVsbG8gdG9nZXRoZXIsCj4+Cj4+IGNhbiBhbnlv bmUgbWUgc2hvcnQgZXhwbGFpbiB3aGF0IGlzIGRlZmVycmVkIHBhZ2UocykgPwo+Pgo+PiBNYW55 IHRoYW5rcwo+Pgo+PiBCZXN0IHJlZ2FyZHMKPj4gRGFtaWFuCj4+Cj4KPiBIbSwgZGlkIHlvdSBt ZWFuIGRlbGF5ZWQvbGF6eSBwYWdpbmc/Cj4gLS0KPiByZWdhcmRzLAo+Cj4gTXVseWFkaSBTYW50 b3NhCj4gRnJlZWxhbmNlIExpbnV4IHRyYWluZXIgYW5kIGNvbnN1bHRhbnQKCgpIaS4uIEkganVz dCBzdHVtYmxlZCBiYWNrIHVwb24gdGhpcyB3aGlsZSBjbGVhbmluZyBvdXQgbXkgaW5ib3ggdGhp cwptb3JuaW5nLiBUaGVyZSdzIG5vdCBtdWNoIG1lbnRpb24sIHVuZGVyIDEsMDAwIHBvc3NpYmls aXRpZXMgY29tZQpiYWNrLCBkdXJpbmcgYSBzZWFyY2ggZm9yICJkZWZlcnJlZCBwYWdpbmciIGlu IHF1b3RhdGlvbiBtYXJrcy4KClRoZXNlIHR3byBzb3VyY2VzIHNvdW5kIGxpa2UgdGhleSBtaWdo dCBmaXQgdGhlIHF1ZXN0aW9uOgoKIzEpIFBhZ2luZyBTcGFjZXMgYnkgVG9tIEZhcndlbGw7IEFw cmlsIDIwMDM7IElCTSBTeXN0ZW1zIE1hZ2F6aW5lCk5PVEU6IEFwcGVhcnMgdG8gcG90ZW50aWFs bHkgYmUgYSBwb3B1cCB3aW5kb3cgdGhhdCBzZWFyY2ggZW5naW5lCnBlcmNlaXZlZCBhcyBhIHJl Z3VsYXIgd2VicGFnZQoKaHR0cDovL2libXN5c3RlbXNtYWcuY29tL0NNU1RlbXBsYXRlcy9JQk1T eXN0ZW1zTWFnL1ByaW50LmFzcHg/cGF0aD0vYWl4L2FkbWluaXN0cmF0b3Ivc3lzdGVtc21hbmFn ZW1lbnQvUGFnaW5nLVNwYWNlcy0oMSkKCkZpcnN0IHJlZmVyZW5jZSBpcyBuZWFyIHRoZSB0b3Ag dW5kZXIgIkFJWCA0LjMuMisgRGVmZXJyZWQgUGFnaW5nClNwYWNlIi4gVGhpcyBpcyBhIHF1aWNr IHF1b3RlIHRoYXQgc291bmRzIGxpa2UgaXQgbWlnaHQgdHJpZ2dlciBhbgphaC1oYSBtb21lbnQg Zm9yIHNvbWU6ICJbLi4uXSBEZWZlcnJlZCBQYWdlIFNwYWNlIEFsbG9jYXRpb24gKERQU0EpCnBv bGljeS4gRFBTQSBkZWxheXMgYWxsb2NhdGluZyBwYWdpbmcgc3BhY2Ugc2xvdHMgdW50aWwgaXQn cyBuZWNlc3NhcnkKdG8gcGFnZSBvdXQgdGhlIGZyYW1lIHRvIHBhZ2luZyBzcGFjZS4iCgoiRFBT QSBkZWxheXMgYWxsb2NhdGluZyIgc291bmRzIGxpa2UgaXQgZmFsbHMgdW5kZXIgeW91cgoiZGVs YXllZC9sYXp5IiByZWZlcmVuY2UuIDopCgpBbmQuLi4uLi4KCiMyKSBBSVggNUwgRGlmZmVyZW5j ZXMgR3VpZGUgVmVyc2lvbiA1LjMgRWRpdGlvbgpCeSBTY290dCBWZXR0ZXIsIEFkcmlhbiBEZW1l dGVyLCBTaGl2IER1dHRhLCBBcm1pbiBSw7ZsbCwgU2VvbmdMdWwgU29uLApJQk0gUmVkYm9va3MK Cmh0dHBzOi8vYm9va3MuZ29vZ2xlLmNvbS9ib29rcz9pZD1WcnE2QWdBQVFCQUomcGc9UEExODAm bHBnPVBBMTgwJmRxPSUyMmRlZmVycmVkK3BhZ2luZyUyMiZzb3VyY2U9Ymwmb3RzPWRyREpPRFVH QnEmc2lnPUpYakZka3JHYjlpb1pGYXVBb1VjUmdxN01nTSZobD1lbiZzYT1YJnZlZD0yYWhVS0V3 aWg1dW1manVQZUFoVnl4MWtLSGRVNERTVVE2QUV3QTNvRUNBWVFBUSN2PW9uZXBhZ2UmcT0lMjJk ZWZlcnJlZCUyMHBhZ2luZyUyMiZmPWZhbHNlCgpLZXl3b3JkcyB0aGF0IGhlbHAgdGhpcyBzb3Vu ZCBhcHByb3ByaWF0ZSBhcmUgIkFJWCBwYWdpbmcgc3BhY2UKYWxsb2NhdGlvbiBwb2xpY3kgYW5k IG1hbmFnZW1lbnQiIHdpdGhpbiBhIHNlY3Rpb24gdGl0bGVkLi4uICJQYWdpbmcKc3BhY2UgZ2Fy YmFnZSBjb2xsZWN0aW9uIi4gVGhhdCBwcm92aWRlZCBhbiBleHBsYW5hdGlvbiB0aGF0IHdhcwpm YWlybHkgKmNvZ25pdGl2ZWx5IGZyaWVuZGx5KiBmb3IgbWUsIGEgdXNlciB3aG8gaGFzIG5ldmVy IHRvdWNoZWQgb24KdGhpcyBjb25jZXB0IGluIGhlciBvd24gY29tcHV0aW5nIHBldHJpIGRpc2gu IFdlbGwgZG9uZSBAIHRoZQphdXRob3IocykuIDopCgpQb3N0aW5nIGZvciB0aGUgYXJjaGl2ZXMu IEhvcGUgaXQgaGVscHMgc29tZW9uZSBzb21lZGF5LiA6KQoKQ2luZHkgOikKLS0gCkNpbmR5LVN1 ZSBDYXVzZXkKVGFsa2luZyBSb2NrLCBQaWNrZW5zIENvdW50eSwgR2VvcmdpYSwgVVNBCgoqIEkg Y29tbWVudCwgdGhlcmVmb3JlIEkgYW0uLi4gcHJvY3Jhc3RpbmF0aW5nIGVsc2V3aGVyZS4gSW5k dWJpdGFibHkuICoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fCktlcm5lbG5ld2JpZXMgbWFpbGluZyBsaXN0Cktlcm5lbG5ld2JpZXNAa2VybmVsbmV3Ymll cy5vcmcKaHR0cHM6Ly9saXN0cy5rZXJuZWxuZXdiaWVzLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2tl cm5lbG5ld2JpZXMK