From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: "Williams, Dan J" To: "jack@suse.cz" CC: "linux-block@vger.kernel.org" , "stable@vger.kernel.org" , "akpm@linux-foundation.org" , "linux-nvdimm@lists.01.org" , "willy@linux.intel.com" , "linux-fsdevel@vger.kernel.org" , "ross.zwisler@linux.intel.com" , "jack@suse.com" , "david@fromorbit.com" Subject: Re: [PATCH 4/8] mm, dax: truncate dax mappings at bdev or fs shutdown Date: Thu, 19 Nov 2015 00:22:14 +0000 Message-ID: <1447892533.13153.8.camel@intel.com> References: <20151117201551.15053.32709.stgit@dwillia2-desk3.jf.intel.com> <20151117201614.15053.62376.stgit@dwillia2-desk3.jf.intel.com> <20151118150945.GE6097@quack.suse.cz> In-Reply-To: <20151118150945.GE6097@quack.suse.cz> Content-Language: en-US Content-Type: text/plain; charset="utf-8" Content-ID: <6B6D0922B2EF4F43A9FF42B705D0E9AC@intel.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org List-ID: T24gV2VkLCAyMDE1LTExLTE4IGF0IDE2OjA5ICswMTAwLCBKYW4gS2FyYSB3cm90ZToNCj4gSHVt LCBJIGRvbid0IGdldCB0aGlzLiB0cnVuY2F0ZV9pbm9kZV9wYWdlc19maW5hbCgpIGdldHMgY2Fs bGVkIHdoZW4gaW5vZGUNCj4gaGFzIG5vIG1vcmUgdXNlcnMuIFNvIHRoZXJlIGFyZSBubyBtYXBw aW5ncyBvZiB0aGUgaW5vZGUuIFNvIGhvdyBjb3VsZA0KPiB0cnVuY2F0ZV9wYWdlY2FjaGUoKSBw b3NzaWJseSBtYWtlIGEgZGlmZmVyZW5jZT8NCg0KVHJ1ZS4gwqBJIGNvbmZpcm1lZCB3aXRoIG1v cmUgZm9jdXMgdGVzdGluZyB0aGF0IHRoZSBjaGFuZ2UgdG8NCnRydW5jYXRlX2lub2RlX3BhZ2Vz X2ZpbmFsKCkgaXMgbm90IG5lY2Vzc2FyeS4gwqBBZnRlcg0KaW52YWxpZGF0ZV9pbm9kZXMoKSBk b2VzIHVubWFwX21hcHBpbmdfcmFuZ2UoKSB3ZSBhcmUgcHJvdGVjdGVkIGJ5DQpmdXR1cmUgY2Fs bHMgdG8gZ2V0X2Jsb2NrKCkgYW5kIGJsa19xdWV1ZV9lbnRlcigpIGZhaWxpbmcgd2hlbiB0aGVy ZQ0KYXJlIGF0dGVtcHRzIHRvIHJlLWVzdGFibGlzaCBhIG1hcHBpbmcgYWZ0ZXIgdGhlIGJsb2Nr IGRldmljZSBoYXMgYmVlbg0KdG9ybiBkb3duLg0KDQpIZXJlJ3MgYSByZXZpc2VkIHBhdGNoLiDC oE5vdGUgdGhhdCB0aGUgY2FsbCB0cnVuY2F0ZV9wYWdlY2FjaGUoKSBpcw0KcmVwbGFjZWQgd2l0 aCBhIGNhbGwgdG8gdW5tYXBfbWFwcGluZ19yYW5nZSgpIHNpbmNlIGl0IGlzIGZpbmUgdG8NCmFj Y2VzcyB6ZXJvIHBhZ2VzIHRoYXQgbWlnaHQgc3RpbGwgYmUgaW4gdGhlIHBhZ2UgY2FjaGUuDQoN Cjg8LS0tLQ0KU3ViamVjdDogbW0sIGRheDogdW5tYXAgZGF4IG1hcHBpbmdzIGF0IGJkZXYgb3Ig ZnMgc2h1dGRvd24NCg0KRnJvbTogRGFuIFdpbGxpYW1zIDxkYW4uai53aWxsaWFtc0BpbnRlbC5j b20+DQoNCkN1cnJlbnRseSBkYXggbWFwcGluZ3MgbGVhayBwYXN0IC8gc3Vydml2ZSBibG9ja19k ZXZpY2Ugc2h1dGRvd24uwqDCoFdoaWxlDQpwYWdlIGNhY2hlIHBhZ2VzIGFyZSBwZXJtaXR0ZWQg dG8gYmUgcmVhZC93cml0dGVuIGFmdGVyIHRoZSBibG9ja19kZXZpY2UNCmlzIHRvcm4gZG93biB0 aGlzIGlzIG5vdCBhY2NlcHRhYmxlIGluIHRoZSBkYXggY2FzZSBhcyBhbGwgbWVkaWEgYWNjZXNz DQptdXN0IGVuZCB3aGVuIHRoZSBkZXZpY2UgaXMgZGlzYWJsZWQuwqDCoFRoZSBwZm4gYmFja2lu ZyBhIGRheCBtYXBwaW5nIGlzDQpwZXJtaXR0ZWQgdG8gYmUgaW52YWxpZGF0ZWQgYWZ0ZXIgYmRl diBzaHV0ZG93biBhbmQgdGhpcyBpcyBpbmRlZWQgdGhlDQpjYXNlIHdpdGggYnJkLg0KDQpXaGVu IGEgZGF4IGNhcGFibGUgYmxvY2tfZGV2aWNlIGRyaXZlciBjYWxscyBkZWxfZ2VuZGlzaygpIGlu IGl0cw0Kc2h1dGRvd24gcGF0aCBkZWxfZ2VuZGlzaygpIG5lZWRzIHRvIGVuc3VyZSB0aGF0IGFs bCBEQVggcGZucyBhcmUNCnVubWFwcGVkLsKgwqBUaGlzIGlzIGRpZmZlcmVudCB0aGFuIHRoZSBw YWdlY2FjaGUgYmFja2VkIGNhc2Ugd2hlcmUgdGhlDQpkaXNrIGlzIHByb3RlY3RlZCBieSB0aGUg cXVldWUgYmVpbmcgdG9ybiBkb3duIHdoaWNoIGVuZHMgSS9PIHRvIHRoZQ0KZGV2aWNlLsKgwqBT aW5jZSBkYXggYnlwYXNzZXMgdGhlIHBhZ2UgY2FjaGUgd2UgbmVlZCB0byB1bmNvbmRpdGlvbmFs bHkNCnVubWFwIHRoZSBpbm9kZS4NCg0KQ2M6IDxzdGFibGVAdmdlci5rZXJuZWwub3JnPg0KQ2M6 IEphbiBLYXJhIDxqYWNrQHN1c2UuY29tPg0KQ2M6IERhdmUgQ2hpbm5lciA8ZGF2aWRAZnJvbW9y Yml0LmNvbT4NCkNjOiBNYXR0aGV3IFdpbGNveCA8d2lsbHlAbGludXguaW50ZWwuY29tPg0KQ2M6 IFJvc3MgWndpc2xlciA8cm9zcy56d2lzbGVyQGxpbnV4LmludGVsLmNvbT4NCltob256YTogZHJv cCBjaGFuZ2VzIHRvIHRydW5jYXRlX2lub2RlX3BhZ2VzX2ZpbmFsXQ0KU2lnbmVkLW9mZi1ieTog RGFuIFdpbGxpYW1zIDxkYW4uai53aWxsaWFtc0BpbnRlbC5jb20+DQotLS0NCsKgZnMvaW5vZGUu YyB8wqDCoMKgMjcgKysrKysrKysrKysrKysrKysrKysrKysrKysrDQrCoDEgZmlsZSBjaGFuZ2Vk LCAyNyBpbnNlcnRpb25zKCspDQoNCmRpZmYgLS1naXQgYS9mcy9pbm9kZS5jIGIvZnMvaW5vZGUu Yw0KaW5kZXggMWJlNWY5MDAzZWIzLi5kY2IzMWQyYzE1ZTYgMTAwNjQ0DQotLS0gYS9mcy9pbm9k ZS5jDQorKysgYi9mcy9pbm9kZS5jDQpAQCAtNTc5LDYgKzU3OSwxOCBAQCBzdGF0aWMgdm9pZCBk aXNwb3NlX2xpc3Qoc3RydWN0IGxpc3RfaGVhZCAqaGVhZCkNCsKgCX0NCsKgfQ0KwqANCitzdGF0 aWMgdm9pZCB1bm1hcF9saXN0KHN0cnVjdCBsaXN0X2hlYWQgKmhlYWQpDQorew0KKwlzdHJ1Y3Qg aW5vZGUgKmlub2RlLCAqX2k7DQorDQorCWxpc3RfZm9yX2VhY2hfZW50cnlfc2FmZShpbm9kZSwg X2ksIGhlYWQsIGlfbHJ1KSB7DQorCQlsaXN0X2RlbF9pbml0KCZpbm9kZS0+aV9scnUpOw0KKwkJ dW5tYXBfbWFwcGluZ19yYW5nZSgmaW5vZGUtPmlfZGF0YSwgMCwgMCwgMSk7DQorCQlpcHV0KGlu b2RlKTsNCisJCWNvbmRfcmVzY2hlZCgpOw0KKwl9DQorfQ0KKw0KwqAvKioNCsKgICogZXZpY3Rf aW5vZGVzCS0gZXZpY3QgYWxsIGV2aWN0YWJsZSBpbm9kZXMgZm9yIGEgc3VwZXJibG9jaw0KwqAg KiBAc2I6CQlzdXBlcmJsb2NrIHRvIG9wZXJhdGUgb24NCkBAIC02NDIsNiArNjU0LDcgQEAgaW50 IGludmFsaWRhdGVfaW5vZGVzKHN0cnVjdCBzdXBlcl9ibG9jayAqc2IsIGJvb2wga2lsbF9kaXJ0 eSkNCsKgCWludCBidXN5ID0gMDsNCsKgCXN0cnVjdCBpbm9kZSAqaW5vZGUsICpuZXh0Ow0KwqAJ TElTVF9IRUFEKGRpc3Bvc2UpOw0KKwlMSVNUX0hFQUQodW5tYXApOw0KwqANCsKgCXNwaW5fbG9j aygmc2ItPnNfaW5vZGVfbGlzdF9sb2NrKTsNCsKgCWxpc3RfZm9yX2VhY2hfZW50cnlfc2FmZShp bm9kZSwgbmV4dCwgJnNiLT5zX2lub2RlcywgaV9zYl9saXN0KSB7DQpAQCAtNjU1LDYgKzY2OCwx OSBAQCBpbnQgaW52YWxpZGF0ZV9pbm9kZXMoc3RydWN0IHN1cGVyX2Jsb2NrICpzYiwgYm9vbCBr aWxsX2RpcnR5KQ0KwqAJCQlidXN5ID0gMTsNCsKgCQkJY29udGludWU7DQrCoAkJfQ0KKwkJaWYg KElTX0RBWChpbm9kZSkgJiYgYXRvbWljX3JlYWQoJmlub2RlLT5pX2NvdW50KSkgew0KKwkJCS8q DQorCQkJwqAqIGRheCBtYXBwaW5ncyBjYW4ndCBsaXZlIHBhc3QgdGhpcyBpbnZhbGlkYXRpb24g ZXZlbnQNCisJCQnCoCogYXMgdGhlcmUgaXMgbm8gcGFnZSBjYWNoZSBwcmVzZW50IHRvIGFsbG93 IHRoZSBkYXRhDQorCQkJwqAqIHRvIHJlbWFpbiBhY2Nlc3NpYmxlLg0KKwkJCcKgKi8NCisJCQlf X2lnZXQoaW5vZGUpOw0KKwkJCWlub2RlX2xydV9saXN0X2RlbChpbm9kZSk7DQorCQkJc3Bpbl91 bmxvY2soJmlub2RlLT5pX2xvY2spOw0KKwkJCWxpc3RfYWRkKCZpbm9kZS0+aV9scnUsICZ1bm1h cCk7DQorCQkJYnVzeSA9IDE7DQorCQkJY29udGludWU7DQorCQl9DQrCoAkJaWYgKGF0b21pY19y ZWFkKCZpbm9kZS0+aV9jb3VudCkpIHsNCsKgCQkJc3Bpbl91bmxvY2soJmlub2RlLT5pX2xvY2sp Ow0KwqAJCQlidXN5ID0gMTsNCkBAIC02NjksNiArNjk1LDcgQEAgaW50IGludmFsaWRhdGVfaW5v ZGVzKHN0cnVjdCBzdXBlcl9ibG9jayAqc2IsIGJvb2wga2lsbF9kaXJ0eSkNCsKgCXNwaW5fdW5s b2NrKCZzYi0+c19pbm9kZV9saXN0X2xvY2spOw0KwqANCsKgCWRpc3Bvc2VfbGlzdCgmZGlzcG9z ZSk7DQorCXVubWFwX2xpc3QoJnVubWFwKTsNCsKgDQrCoAlyZXR1cm4gYnVzeTsNCsKgfQ==