From mboxrd@z Thu Jan 1 00:00:00 1970 From: Felix Kuehling Subject: Re: [RFC PATCH] mm, oom: distinguish blockable mode for mmu notifiers Date: Fri, 22 Jun 2018 16:09:06 -0400 Message-ID: References: <20180622150242.16558-1-mhocko@kernel.org> <0aa9f695-5702-6704-9462-7779cbfdb3fd@amd.com> <20180622152444.GC10465@dhcp22.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 1fWSN1-0005J4-Qm for xen-devel@lists.xenproject.org; Fri, 22 Jun 2018 20:09:23 +0000 In-Reply-To: <20180622152444.GC10465@dhcp22.suse.cz> Content-Language: en-CA List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Michal Hocko , =?UTF-8?Q?Christian_K=c3=b6nig?= Cc: kvm@vger.kernel.org, =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , David Airlie , Joonas Lahtinen , Sudeep Dutt , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, Andrea Arcangeli , "David (ChunMing) Zhou" , Dimitri Sivanich , linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, Jason Gunthorpe , Doug Ledford , David Rientjes , xen-devel@lists.xenproject.org, intel-gfx@lists.freedesktop.org, Jani Nikula , =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , Rodrigo Vivi , Boris Ostrovsky , Juergen Gross , Mike Marciniszyn , Dennis List-Id: xen-devel@lists.xenproject.org T24gMjAxOC0wNi0yMiAxMToyNCBBTSwgTWljaGFsIEhvY2tvIHdyb3RlOgo+IE9uIEZyaSAyMi0w Ni0xOCAxNzoxMzowMiwgQ2hyaXN0aWFuIEvDtm5pZyB3cm90ZToKPj4gSGkgTWljaGFsLAo+Pgo+ PiBbQWRkaW5nIEZlbGl4IGFzIHdlbGxdCj4+Cj4+IFdlbGwgZmlyc3Qgb2YgYWxsIHlvdSBoYXZl IGEgbWlzY29uY2VwdGlvbiB3aHkgYXQgbGVhc3QgdGhlIEFNRCBncmFwaGljcwo+PiBkcml2ZXIg bmVlZCB0byBiZSBhYmxlIHRvIHNsZWVwIGluIGFuIE1NVSBub3RpZmllcjogV2UgbmVlZCB0byBz bGVlcCBiZWNhdXNlCj4+IHdlIG5lZWQgdG8gd2FpdCBmb3IgaGFyZHdhcmUgb3BlcmF0aW9ucyB0 byBmaW5pc2ggYW5kICpOT1QqIGJlY2F1c2Ugd2UgbmVlZAo+PiB0byB3YWl0IGZvciBsb2Nrcy4K Pj4KPj4gSSdtIG5vdCBzdXJlIGlmIHlvdXIgZmxhZyBub3cgbWVhbnMgdGhhdCB5b3UgZ2VuZXJh bGx5IGNhbid0IHNsZWVwIGluIE1NVQo+PiBub3RpZmllcnMgYW55IG1vcmUsIGJ1dCBpZiB0aGF0 J3MgdGhlIGNhc2UgYXQgbGVhc3QgQU1EIGhhcmR3YXJlIHdpbGwgYnJlYWsKPj4gYmFkbHkuIElu IG91ciBjYXNlIHRoZSBhcHByb2FjaCBvZiB3YWl0aW5nIGZvciBhIHNob3J0IHRpbWUgZm9yIHRo ZSBwcm9jZXNzCj4+IHRvIGJlIHJlYXBlZCBhbmQgdGhlbiBzZWxlY3QgYW5vdGhlciB2aWN0aW0g YWN0dWFsbHkgc291bmRzIGxpa2UgdGhlIHJpZ2h0Cj4+IHRoaW5nIHRvIGRvLgo+IFdlbGwsIEkg ZG8gbm90IG5lZWQgdG8gbWFrZSB0aGUgbm90aWZpZXIgY29kZSBub24gYmxvY2tpbmcgYWxsIHRo ZSB0aW1lLgo+IEFsbCBJIG5lZWQgaXMgdG8gZW5zdXJlIHRoYXQgaXQgd29uJ3Qgc2xlZXAgaWYg dGhlIGZsYWcgc2F5cyBzbyBhbmQKPiByZXR1cm4gLUVBR0FJTiBpbnN0ZWFkLgo+Cj4gU28gaGVy ZSBpcyB3aGF0IEkgZG8gZm9yIGFtZGdwdToKCkluIHRoZSBjYXNlIG9mIEtGRCB3ZSBhbHNvIG5l ZWQgdG8gdGFrZSB0aGUgRFFNIGxvY2s6CgphbWRncHVfbW5faW52YWxpZGF0ZV9yYW5nZV9zdGFy dF9oc2EgLT4gYW1kZ3B1X2FtZGtmZF9ldmljdF91c2VycHRyIC0+CmtnZDJrZmRfcXVpZXNjZV9t bSAtPiBrZmRfcHJvY2Vzc19ldmljdF9xdWV1ZXMgLT4gZXZpY3RfcHJvY2Vzc19xdWV1ZXNfY3Bz Y2gKClNvIHdlJ2QgbmVlZCB0byBwYXNzIHRoZSBibG9ja2FibGUgcGFyYW1ldGVyIGFsbCB0aGUg d2F5IHRocm91Z2ggdGhhdApjYWxsIGNoYWluLgoKUmVnYXJkcywKwqAgRmVsaXgKCj4KPj4+IGRp ZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0vYW1kL2FtZGdwdS9hbWRncHVfbW4uYyBiL2RyaXZl cnMvZ3B1L2RybS9hbWQvYW1kZ3B1L2FtZGdwdV9tbi5jCj4+PiBpbmRleCA4M2UzNDRmYmI1MGEu LmQxMzhhNTI2ZmVmZiAxMDA2NDQKPj4+IC0tLSBhL2RyaXZlcnMvZ3B1L2RybS9hbWQvYW1kZ3B1 L2FtZGdwdV9tbi5jCj4+PiArKysgYi9kcml2ZXJzL2dwdS9kcm0vYW1kL2FtZGdwdS9hbWRncHVf bW4uYwo+Pj4gQEAgLTEzNiwxMiArMTM2LDE4IEBAIHZvaWQgYW1kZ3B1X21uX3VubG9jayhzdHJ1 Y3QgYW1kZ3B1X21uICptbikKPj4+ICAgICoKPj4+ICAgICogVGFrZSB0aGUgcm1uIHJlYWQgc2lk ZSBsb2NrLgo+Pj4gICAgKi8KPj4+IC1zdGF0aWMgdm9pZCBhbWRncHVfbW5fcmVhZF9sb2NrKHN0 cnVjdCBhbWRncHVfbW4gKnJtbikKPj4+ICtzdGF0aWMgaW50IGFtZGdwdV9tbl9yZWFkX2xvY2so c3RydWN0IGFtZGdwdV9tbiAqcm1uLCBib29sIGJsb2NrYWJsZSkKPj4+ICAgewo+Pj4gLQltdXRl eF9sb2NrKCZybW4tPnJlYWRfbG9jayk7Cj4+PiArCWlmIChibG9ja2FibGUpCj4+PiArCQltdXRl eF9sb2NrKCZybW4tPnJlYWRfbG9jayk7Cj4+PiArCWVsc2UgaWYgKCFtdXRleF90cnlsb2NrKCZy bW4tPnJlYWRfbG9jaykpCj4+PiArCQlyZXR1cm4gLUVBR0FJTjsKPj4+ICsKPj4+ICAgCWlmIChh dG9taWNfaW5jX3JldHVybigmcm1uLT5yZWN1cnNpb24pID09IDEpCj4+PiAgIAkJZG93bl9yZWFk X25vbl9vd25lcigmcm1uLT5sb2NrKTsKPj4+ICAgCW11dGV4X3VubG9jaygmcm1uLT5yZWFkX2xv Y2spOwo+Pj4gKwo+Pj4gKwlyZXR1cm4gMDsKPj4+ICAgfQo+Pj4gICAvKioKPj4+IEBAIC0xOTcs MTAgKzIwMywxMSBAQCBzdGF0aWMgdm9pZCBhbWRncHVfbW5faW52YWxpZGF0ZV9ub2RlKHN0cnVj dCBhbWRncHVfbW5fbm9kZSAqbm9kZSwKPj4+ICAgICogV2UgYmxvY2sgZm9yIGFsbCBCT3MgYmV0 d2VlbiBzdGFydCBhbmQgZW5kIHRvIGJlIGlkbGUgYW5kCj4+PiAgICAqIHVubWFwIHRoZW0gYnkg bW92ZSB0aGVtIGludG8gc3lzdGVtIGRvbWFpbiBhZ2Fpbi4KPj4+ICAgICovCj4+PiAtc3RhdGlj IHZvaWQgYW1kZ3B1X21uX2ludmFsaWRhdGVfcmFuZ2Vfc3RhcnRfZ2Z4KHN0cnVjdCBtbXVfbm90 aWZpZXIgKm1uLAo+Pj4gK3N0YXRpYyBpbnQgYW1kZ3B1X21uX2ludmFsaWRhdGVfcmFuZ2Vfc3Rh cnRfZ2Z4KHN0cnVjdCBtbXVfbm90aWZpZXIgKm1uLAo+Pj4gICAJCQkJCQkgc3RydWN0IG1tX3N0 cnVjdCAqbW0sCj4+PiAgIAkJCQkJCSB1bnNpZ25lZCBsb25nIHN0YXJ0LAo+Pj4gLQkJCQkJCSB1 bnNpZ25lZCBsb25nIGVuZCkKPj4+ICsJCQkJCQkgdW5zaWduZWQgbG9uZyBlbmQsCj4+PiArCQkJ CQkJIGJvb2wgYmxvY2thYmxlKQo+Pj4gICB7Cj4+PiAgIAlzdHJ1Y3QgYW1kZ3B1X21uICpybW4g PSBjb250YWluZXJfb2YobW4sIHN0cnVjdCBhbWRncHVfbW4sIG1uKTsKPj4+ICAgCXN0cnVjdCBp bnRlcnZhbF90cmVlX25vZGUgKml0Owo+Pj4gQEAgLTIwOCw3ICsyMTUsMTEgQEAgc3RhdGljIHZv aWQgYW1kZ3B1X21uX2ludmFsaWRhdGVfcmFuZ2Vfc3RhcnRfZ2Z4KHN0cnVjdCBtbXVfbm90aWZp ZXIgKm1uLAo+Pj4gICAJLyogbm90aWZpY2F0aW9uIGlzIGV4Y2x1c2l2ZSwgYnV0IGludGVydmFs IGlzIGluY2x1c2l2ZSAqLwo+Pj4gICAJZW5kIC09IDE7Cj4+PiAtCWFtZGdwdV9tbl9yZWFkX2xv Y2socm1uKTsKPj4+ICsJLyogVE9ETyB3ZSBzaG91bGQgYmUgYWJsZSB0byBzcGxpdCBsb2NraW5n IGZvciBpbnRlcnZhbCB0cmVlIGFuZAo+Pj4gKwkgKiBhbWRncHVfbW5faW52YWxpZGF0ZV9ub2Rl Cj4+PiArCSAqLwo+Pj4gKwlpZiAoYW1kZ3B1X21uX3JlYWRfbG9jayhybW4sIGJsb2NrYWJsZSkp Cj4+PiArCQlyZXR1cm4gLUVBR0FJTjsKPj4+ICAgCWl0ID0gaW50ZXJ2YWxfdHJlZV9pdGVyX2Zp cnN0KCZybW4tPm9iamVjdHMsIHN0YXJ0LCBlbmQpOwo+Pj4gICAJd2hpbGUgKGl0KSB7Cj4+PiBA QCAtMjE5LDYgKzIzMCw4IEBAIHN0YXRpYyB2b2lkIGFtZGdwdV9tbl9pbnZhbGlkYXRlX3Jhbmdl X3N0YXJ0X2dmeChzdHJ1Y3QgbW11X25vdGlmaWVyICptbiwKPj4+ICAgCQlhbWRncHVfbW5faW52 YWxpZGF0ZV9ub2RlKG5vZGUsIHN0YXJ0LCBlbmQpOwo+Pj4gICAJfQo+Pj4gKwo+Pj4gKwlyZXR1 cm4gMDsKPj4+ICAgfQo+Pj4gICAvKioKPj4+IEBAIC0yMzMsMTAgKzI0NiwxMSBAQCBzdGF0aWMg dm9pZCBhbWRncHVfbW5faW52YWxpZGF0ZV9yYW5nZV9zdGFydF9nZngoc3RydWN0IG1tdV9ub3Rp ZmllciAqbW4sCj4+PiAgICAqIG5lY2Vzc2l0YXRlcyBldmljdGluZyBhbGwgdXNlci1tb2RlIHF1 ZXVlcyBvZiB0aGUgcHJvY2Vzcy4gVGhlIEJPcwo+Pj4gICAgKiBhcmUgcmVzdG9ydGVkIGluIGFt ZGdwdV9tbl9pbnZhbGlkYXRlX3JhbmdlX2VuZF9oc2EuCj4+PiAgICAqLwo+Pj4gLXN0YXRpYyB2 b2lkIGFtZGdwdV9tbl9pbnZhbGlkYXRlX3JhbmdlX3N0YXJ0X2hzYShzdHJ1Y3QgbW11X25vdGlm aWVyICptbiwKPj4+ICtzdGF0aWMgaW50IGFtZGdwdV9tbl9pbnZhbGlkYXRlX3JhbmdlX3N0YXJ0 X2hzYShzdHJ1Y3QgbW11X25vdGlmaWVyICptbiwKPj4+ICAgCQkJCQkJIHN0cnVjdCBtbV9zdHJ1 Y3QgKm1tLAo+Pj4gICAJCQkJCQkgdW5zaWduZWQgbG9uZyBzdGFydCwKPj4+IC0JCQkJCQkgdW5z aWduZWQgbG9uZyBlbmQpCj4+PiArCQkJCQkJIHVuc2lnbmVkIGxvbmcgZW5kLAo+Pj4gKwkJCQkJ CSBib29sIGJsb2NrYWJsZSkKPj4+ICAgewo+Pj4gICAJc3RydWN0IGFtZGdwdV9tbiAqcm1uID0g Y29udGFpbmVyX29mKG1uLCBzdHJ1Y3QgYW1kZ3B1X21uLCBtbik7Cj4+PiAgIAlzdHJ1Y3QgaW50 ZXJ2YWxfdHJlZV9ub2RlICppdDsKPj4+IEBAIC0yNDQsNyArMjU4LDggQEAgc3RhdGljIHZvaWQg YW1kZ3B1X21uX2ludmFsaWRhdGVfcmFuZ2Vfc3RhcnRfaHNhKHN0cnVjdCBtbXVfbm90aWZpZXIg Km1uLAo+Pj4gICAJLyogbm90aWZpY2F0aW9uIGlzIGV4Y2x1c2l2ZSwgYnV0IGludGVydmFsIGlz IGluY2x1c2l2ZSAqLwo+Pj4gICAJZW5kIC09IDE7Cj4+PiAtCWFtZGdwdV9tbl9yZWFkX2xvY2so cm1uKTsKPj4+ICsJaWYgKGFtZGdwdV9tbl9yZWFkX2xvY2socm1uLCBibG9ja2FibGUpKQo+Pj4g KwkJcmV0dXJuIC1FQUdBSU47Cj4+PiAgIAlpdCA9IGludGVydmFsX3RyZWVfaXRlcl9maXJzdCgm cm1uLT5vYmplY3RzLCBzdGFydCwgZW5kKTsKPj4+ICAgCXdoaWxlIChpdCkgewo+Pj4gQEAgLTI2 Miw2ICsyNzcsOCBAQCBzdGF0aWMgdm9pZCBhbWRncHVfbW5faW52YWxpZGF0ZV9yYW5nZV9zdGFy dF9oc2Eoc3RydWN0IG1tdV9ub3RpZmllciAqbW4sCj4+PiAgIAkJCQlhbWRncHVfYW1ka2ZkX2V2 aWN0X3VzZXJwdHIobWVtLCBtbSk7Cj4+PiAgIAkJfQo+Pj4gICAJfQo+Pj4gKwo+Pj4gKwlyZXR1 cm4gMDsKPj4+ICAgfQo+Pj4gICAvKioKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54 ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxtYW4vbGlzdGlu Zm8veGVuLWRldmVs