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spf=none smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1igtA0-0001Ci-7G; Mon, 16 Dec 2019 16:23:52 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1igt9z-0001Cd-1g for xen-devel@lists.xenproject.org; Mon, 16 Dec 2019 16:23:51 +0000 X-Inumbo-ID: 711ea666-2020-11ea-93ce-12813bfff9fa Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 711ea666-2020-11ea-93ce-12813bfff9fa; Mon, 16 Dec 2019 16:23:50 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 43EF2B229; Mon, 16 Dec 2019 16:23:49 +0000 (UTC) To: SeongJae Park , axboe@kernel.dk, konrad.wilk@oracle.com, roger.pau@citrix.com References: <20191216161549.26976-1-sjpark@amazon.com> From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Message-ID: <2ad62cc8-ae78-6087-f277-923dc076383a@suse.com> Date: Mon, 16 Dec 2019 17:23:44 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.1 MIME-Version: 1.0 In-Reply-To: <20191216161549.26976-1-sjpark@amazon.com> Content-Language: en-US Subject: Re: [Xen-devel] [PATCH v10 2/4] xen/blkback: Squeeze page pools if a memory pressure is detected X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, pdurrant@amazon.com, sj38.park@gmail.com, linux-kernel@vger.kernel.org Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" T24gMTYuMTIuMTkgMTc6MTUsIFNlb25nSmFlIFBhcmsgd3JvdGU6Cj4gT24gTW9uLCAxNiBEZWMg MjAxOSAxNTozNzoyMCArMDEwMCBTZW9uZ0phZSBQYXJrIDxzanBhcmtAYW1hem9uLmNvbT4gd3Jv dGU6Cj4gCj4+IE9uIE1vbiwgMTYgRGVjIDIwMTkgMTM6NDU6MjUgKzAxMDAgU2VvbmdKYWUgUGFy ayA8c2pwYXJrQGFtYXpvbi5jb20+IHdyb3RlOgo+Pgo+Pj4gRnJvbTogU2VvbmdKYWUgUGFyayA8 c2pwYXJrQGFtYXpvbi5kZT4KPj4+Cj4gWy4uLl0KPj4+IC0tLSBhL2RyaXZlcnMvYmxvY2sveGVu LWJsa2JhY2sveGVuYnVzLmMKPj4+ICsrKyBiL2RyaXZlcnMvYmxvY2sveGVuLWJsa2JhY2sveGVu YnVzLmMKPj4+IEBAIC04MjQsNiArODI0LDI0IEBAIHN0YXRpYyB2b2lkIGZyb250ZW5kX2NoYW5n ZWQoc3RydWN0IHhlbmJ1c19kZXZpY2UgKmRldiwKPj4+ICAgfQo+Pj4gICAKPj4+ICAgCj4+PiAr LyogT25jZSBhIG1lbW9yeSBwcmVzc3VyZSBpcyBkZXRlY3RlZCwgc3F1ZWV6ZSBmcmVlIHBhZ2Ug cG9vbHMgZm9yIGEgd2hpbGUuICovCj4+PiArc3RhdGljIHVuc2lnbmVkIGludCBidWZmZXJfc3F1 ZWV6ZV9kdXJhdGlvbl9tcyA9IDEwOwo+Pj4gK21vZHVsZV9wYXJhbV9uYW1lZChidWZmZXJfc3F1 ZWV6ZV9kdXJhdGlvbl9tcywKPj4+ICsJCWJ1ZmZlcl9zcXVlZXplX2R1cmF0aW9uX21zLCBpbnQs IDA2NDQpOwo+Pj4gK01PRFVMRV9QQVJNX0RFU0MoYnVmZmVyX3NxdWVlemVfZHVyYXRpb25fbXMs Cj4+PiArIkR1cmF0aW9uIGluIG1zIHRvIHNxdWVlemUgcGFnZXMgYnVmZmVyIHdoZW4gYSBtZW1v cnkgcHJlc3N1cmUgaXMgZGV0ZWN0ZWQiKTsKPj4+ICsKPj4+ICsvKgo+Pj4gKyAqIENhbGxiYWNr IHJlY2VpdmVkIHdoZW4gdGhlIG1lbW9yeSBwcmVzc3VyZSBpcyBkZXRlY3RlZC4KPj4+ICsgKi8K Pj4+ICtzdGF0aWMgdm9pZCByZWNsYWltX21lbW9yeShzdHJ1Y3QgeGVuYnVzX2RldmljZSAqZGV2 KQo+Pj4gK3sKPj4+ICsJc3RydWN0IGJhY2tlbmRfaW5mbyAqYmUgPSBkZXZfZ2V0X2RydmRhdGEo JmRldi0+ZGV2KTsKPj4+ICsKPj4+ICsJYmUtPmJsa2lmLT5idWZmZXJfc3F1ZWV6ZV9lbmQgPSBq aWZmaWVzICsKPj4+ICsJCW1zZWNzX3RvX2ppZmZpZXMoYnVmZmVyX3NxdWVlemVfZHVyYXRpb25f bXMpOwo+Pgo+PiBUaGlzIGNhbGxiYWNrIG1pZ2h0IHJhY2Ugd2l0aCAneGVuX2Jsa2JrX3Byb2Jl KCknLiAgVGhlIHJhY2UgY291bGQgcmVzdWx0IGluCj4+IF9fTlVMTCBkZXJlZmVyZW5jaW5nX18s IGFzICd4ZW5fYmxrYmtfcHJvYmUoKScgc2V0cyAnLT5ibGtpZicgYWZ0ZXIgaXQgbGlua3MKPj4g J2JlJyB0byB0aGUgJ2RldicuICBQbGVhc2UgX2Rvbid0IG1lcmdlXyB0aGlzIHBhdGNoIG5vdyEK Pj4KPj4gSSB3aWxsIGRvIG1vcmUgdGVzdCBhbmQgc2hhcmUgcmVzdWx0cy4gIE1lYW53aGlsZSwg aWYgeW91IGhhdmUgYW55IG9waW5pb24sCj4+IHBsZWFzZSBsZXQgbWUga25vdy4KPiAKPiBOb3Qg b25seSAnLT5ibGtpZicsIGJ1dCAnYmUnIGl0c2VsZiBhbHNvIGNvdWxlIGJlIGEgTlVMTC4gIEFz IHNpbWlsYXIKPiBjb25jdXJyZW5jeSBpc3N1ZXMgY291bGQgYmUgaW4gb3RoZXIgZHJpdmVycyBp biB0aGVpciB3YXksIEkgc3VnZ2VzdCB0byBjaGFuZ2UKPiB0aGUgcmVjbGFpbSBjYWxsYmFjayAo Jy0+cmVjbGFpbV9tZW1vcnknKSB0byBiZSBjYWxsZWQgZm9yIGVhY2ggZHJpdmVyIGluc3RlYWQK PiBvZiBlYWNoIGRldmljZS4gIFRoZW4sIGVhY2ggZHJpdmVyIGNvdWxkIGJlIGFibGUgdG8gZGVh bCB3aXRoIGl0cyBjb25jdXJyZW5jeQo+IGlzc3VlcyBieSBpdHNlbGYuCgpIbW0sIEkgZG9uJ3Qg bGlrZSB0aGF0LiBUaGlzIHdvdWxkIG5lZWQgdG8gYmUgY2hhbmdlZCBiYWNrIGluIGNhc2Ugd2UK YWRkIHBlci1ndWVzdCBxdW90YS4KCldvdWxkbid0IGEgZ2V0X2RldmljZSgpIGJlZm9yZSBjYWxs aW5nIHRoZSBjYWxsYmFjayBhbmQgYSBwdXRfZGV2aWNlKCkKYWZ0ZXJ3YXJkcyBhdm9pZCB0aGF0 IHByb2JsZW0/CgoKSnVlcmdlbgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVucHJv amVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hl bi1kZXZlbA==