From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wei Yang Subject: Re: [PATCH v5 1/2] memory_hotplug: Free pages as higher order Date: Tue, 20 Nov 2018 06:15:39 +0800 Message-ID: References: <1538727006-5727-1-git-send-email-arunks@codeaurora.org> <72215e75-6c7e-0aef-c06e-e3aba47cf806@suse.cz> <97d8db4c-f117-8216-5f48-d5991692c867@suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gOrph-000210-4P for xen-devel@lists.xenproject.org; Mon, 19 Nov 2018 22:15:53 +0000 Received: by mail-it1-x144.google.com with SMTP id v11so540752itj.0 for ; Mon, 19 Nov 2018 14:15:51 -0800 (PST) In-Reply-To: <97d8db4c-f117-8216-5f48-d5991692c867@suse.cz> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Vlastimil Babka Cc: Michal Hocko , vatsa@codeaurora.org, Linux-MM , arunks@codeaurora.org, getarunks@gmail.com, "K. Y. Srinivasan" , Boris Ostrovsky , Stephen Hemminger , xen-devel@lists.xenproject.org, Haiyang Zhang , Yasuaki Ishimatsu , Dan Williams , Andrew Morton , Oscar Salvador , jgross@suse.com, aaron.lu@intel.com, Mathieu Malaterre , Greg Kroah-Hartman , Linux Kernel Mailing List , Vinayak Menon , jrdr.linux@gmail.com, devel@linuxdriverproject.org, iamjoonsoo.kim@lge.com, Mel Gorman , "Kirill A . Shutemov" List-Id: xen-devel@lists.xenproject.org T24gVGh1LCBPY3QgMTEsIDIwMTggYXQgNjowNSBQTSBWbGFzdGltaWwgQmFia2EgPHZiYWJrYUBz dXNlLmN6PiB3cm90ZToKPgo+IE9uIDEwLzEwLzE4IDY6NTYgUE0sIEFydW4gS1Mgd3JvdGU6Cj4g PiBPbiAyMDE4LTEwLTEwIDIxOjAwLCBWbGFzdGltaWwgQmFia2Egd3JvdGU6Cj4gPj4gT24gMTAv NS8xOCAxMDoxMCBBTSwgQXJ1biBLUyB3cm90ZToKPiA+Pj4gV2hlbiBmcmVlIHBhZ2VzIGFyZSBk b25lIHdpdGggaGlnaGVyIG9yZGVyLCB0aW1lIHNwZW5kIG9uCj4gPj4+IGNvYWxlc2NpbmcgcGFn ZXMgYnkgYnVkZHkgYWxsb2NhdG9yIGNhbiBiZSByZWR1Y2VkLiBXaXRoCj4gPj4+IHNlY3Rpb24g c2l6ZSBvZiAyNTZNQiwgaG90IGFkZCBsYXRlbmN5IG9mIGEgc2luZ2xlIHNlY3Rpb24KPiA+Pj4g c2hvd3MgaW1wcm92ZW1lbnQgZnJvbSA1MC02MCBtcyB0byBsZXNzIHRoYW4gMSBtcywgaGVuY2UK PiA+Pj4gaW1wcm92aW5nIHRoZSBob3QgYWRkIGxhdGVuY3kgYnkgNjAlLiBNb2RpZnkgZXh0ZXJu YWwKPiA+Pj4gcHJvdmlkZXJzIG9mIG9ubGluZSBjYWxsYmFjayB0byBhbGlnbiB3aXRoIHRoZSBj aGFuZ2UuCj4gPj4+Cj4gPj4+IFNpZ25lZC1vZmYtYnk6IEFydW4gS1MgPGFydW5rc0Bjb2RlYXVy b3JhLm9yZz4KPiA+Pgo+ID4+IFsuLi5dCj4gPj4KPiA+Pj4gQEAgLTY1NSwyNiArNjU1LDQ0IEBA IHZvaWQgX19vbmxpbmVfcGFnZV9mcmVlKHN0cnVjdCBwYWdlICpwYWdlKQo+ID4+PiAgfQo+ID4+ PiAgRVhQT1JUX1NZTUJPTF9HUEwoX19vbmxpbmVfcGFnZV9mcmVlKTsKPiA+Pj4KPiA+Pj4gLXN0 YXRpYyB2b2lkIGdlbmVyaWNfb25saW5lX3BhZ2Uoc3RydWN0IHBhZ2UgKnBhZ2UpCj4gPj4+ICtz dGF0aWMgaW50IGdlbmVyaWNfb25saW5lX3BhZ2Uoc3RydWN0IHBhZ2UgKnBhZ2UsIHVuc2lnbmVk IGludCBvcmRlcikKPiA+Pj4gIHsKPiA+Pj4gLSAgIF9fb25saW5lX3BhZ2Vfc2V0X2xpbWl0cyhw YWdlKTsKPiA+Pgo+ID4+IFRoaXMgaXMgbm93IG5vdCBjYWxsZWQgYW55bW9yZSwgYWx0aG91Z2gg dGhlIHhlbi9odiB2YXJpYW50cyBzdGlsbCBkbwo+ID4+IGl0LiBUaGUgZnVuY3Rpb24gc2VlbXMg ZW1wdHkgdGhlc2UgZGF5cywgbWF5YmUgcmVtb3ZlIGl0IGFzIGEgZm9sbG93dXAKPiA+PiBjbGVh bnVwPwo+ID4+Cj4gPj4+IC0gICBfX29ubGluZV9wYWdlX2luY3JlbWVudF9jb3VudGVycyhwYWdl KTsKPiA+Pj4gLSAgIF9fb25saW5lX3BhZ2VfZnJlZShwYWdlKTsKPiA+Pj4gKyAgIF9fZnJlZV9w YWdlc19jb3JlKHBhZ2UsIG9yZGVyKTsKPiA+Pj4gKyAgIHRvdGFscmFtX3BhZ2VzICs9ICgxVUwg PDwgb3JkZXIpOwo+ID4+PiArI2lmZGVmIENPTkZJR19ISUdITUVNCj4gPj4+ICsgICBpZiAoUGFn ZUhpZ2hNZW0ocGFnZSkpCj4gPj4+ICsgICAgICAgICAgIHRvdGFsaGlnaF9wYWdlcyArPSAoMVVM IDw8IG9yZGVyKTsKPiA+Pj4gKyNlbmRpZgo+ID4+Cj4gPj4gX19vbmxpbmVfcGFnZV9pbmNyZW1l bnRfY291bnRlcnMoKSB3b3VsZCBoYXZlIHVzZWQKPiA+PiBhZGp1c3RfbWFuYWdlZF9wYWdlX2Nv dW50KCkgd2hpY2ggd291bGQgZG8gdGhlIGNoYW5nZXMgdW5kZXIKPiA+PiBtYW5hZ2VkX3BhZ2Vf Y291bnRfbG9jay4gQXJlIHdlIHNhZmUgd2l0aG91dCB0aGUgbG9jaz8gSWYgeWVzLCB0aGVyZQo+ ID4+IHNob3VsZCBwZXJoYXBzIGJlIGEgY29tbWVudCBleHBsYWluaW5nIHdoeS4KPiA+Cj4gPiBM b29rcyB1bnNhZmUgd2l0aG91dCBtYW5hZ2VkX3BhZ2VfY291bnRfbG9jay4gSSB0aGluayBiZXR0 ZXIgaGF2ZSBhCj4gPiBzaW1pbGFyIGltcGxlbWVudGF0aW9uIG9mIGZyZWVfYm9vdF9jb3JlKCkg aW4gbWVtb3J5X2hvdHBsdWcuYyBsaWtlIHdlCj4gPiBoYWQgaW4gdmVyc2lvbiAxIG9mIHBhdGNo LiBBbmQgdXNlIGFkanVzdF9tYW5hZ2VkX3BhZ2VfY291bnQoKSBpbnN0ZWFkCj4gPiBvZiBwYWdl X3pvbmUocGFnZSktPm1hbmFnZWRfcGFnZXMgKz0gbnJfcGFnZXM7Cj4gPgo+ID4gaHR0cHM6Ly9s b3JlLmtlcm5lbC5vcmcvcGF0Y2h3b3JrL3BhdGNoLzk4OTQ0NS8KPgo+IExvb2tzIGxpa2UgZGVm ZXJyZWRfZnJlZV9yYW5nZSgpIGhhcyB0aGUgc2FtZSBwcm9ibGVtIGNhbGxpbmcKPiBfX2ZyZWVf cGFnZXNfY29yZSgpIHRvIGFkanVzdCB6b25lLT5tYW5hZ2VkX3BhZ2VzLiBJIGV4cGVjdAo+IF9f ZnJlZV9wYWdlc19ib290bWVtKCkgaXMgT0sgYmVjYXVzZSBhdCB0aGF0IHBvaW50IHRoZSBzeXN0 ZW0gaXMgc3RpbGwKPiBzaW5nbGUtdGhyZWFkZWQ/Cj4gQ291bGQgYmUgc29sdmVkIGJ5IG1vdmlu ZyB0aGF0IG91dCBvZiBfX2ZyZWVfcGFnZXNfY29yZSgpLgo+CgpTZWVtcyBkZWZlcnJlZF9mcmVl X3JhbmdlKCkgaXMgcHJvdGVjdGVkIGJ5CnBnZGF0X3Jlc2l6ZV9sb2NrKCkvcGdkYXRfcmVzaXpl X3VubG9jaygpLgoKV2hpY2ggcHJvdGVjdHMgcGdkYXQncyB6b25lcywgaWYgSSBhbSByaWdodC4K Cj4gQnV0IGRvIHdlIGNhcmUgYWJvdXQgcmVhZGVycyBwb3RlbnRpYWxseSBzZWVpbmcgYSBzdG9y ZSB0ZWFyPyBJZiB5ZXMKPiB0aGVuIG1heWJlIHRoZXNlIGNvdW50ZXJzIHNob3VsZCBiZSBjb252 ZXJ0ZWQgdG8gYXRvbWljcy4uLgo+Cj4gPiAtc3RhdGljIHZvaWQgZ2VuZXJpY19vbmxpbmVfcGFn ZShzdHJ1Y3QgcGFnZSAqcGFnZSkKPiA+ICtzdGF0aWMgaW50IGdlbmVyaWNfb25saW5lX3BhZ2Uo c3RydWN0IHBhZ2UgKnBhZ2UsIHVuc2lnbmVkIGludCBvcmRlcikKPiA+ICAgewo+ID4gLSAgICAg X19vbmxpbmVfcGFnZV9zZXRfbGltaXRzKHBhZ2UpOwo+ID4gLSAgICAgX19vbmxpbmVfcGFnZV9p bmNyZW1lbnRfY291bnRlcnMocGFnZSk7Cj4gPiAtICAgICBfX29ubGluZV9wYWdlX2ZyZWUocGFn ZSk7Cj4gPiArICAgICB1bnNpZ25lZCBsb25nIG5yX3BhZ2VzID0gMSA8PCBvcmRlcjsKPiA+ICsg ICAgIHN0cnVjdCBwYWdlICpwID0gcGFnZTsKPiA+ICsKPiA+ICsgICAgIGZvciAobG9vcCA9IDAg OyBsb29wIDwgbnJfcGFnZXMgOyBsb29wKyssIHArKykgewo+ID4gKyAgICAgICAgICAgICBfX0Ns ZWFyUGFnZVJlc2VydmVkKHApOwo+ID4gKyAgICAgICAgICAgICBzZXRfcGFnZV9jb3VudChwLCAw KTsKPiA+ICsgICAgIH0KPiA+ICsKPiA+ICsgICAgIGFkanVzdF9tYW5hZ2VkX3BhZ2VfY291bnQo cGFnZSwgbnJfcGFnZXMpOwo+ID4gKyAgICAgc2V0X3BhZ2VfcmVmY291bnRlZChwYWdlKTsKPiA+ ICsgICAgIF9fZnJlZV9wYWdlcyhwYWdlLCBvcmRlcik7Cj4gPiArCj4gPiArICAgICByZXR1cm4g MDsKPiA+ICt9Cj4gPgo+ID4KPiA+IFJlZ2FyZHMsCj4gPiBBcnVuCj4gPgo+CgpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBs aXN0Clhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2pl Y3Qub3JnL21haWxtYW4vbGlzdGluZm8veGVuLWRldmVs