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Tsirkin" To: Jason Wang Subject: Re: WARNING in __mmdrop Message-ID: <20190726082837-mutt-send-email-mst@kernel.org> References: <20190723051828-mutt-send-email-mst@kernel.org> <20190725012149-mutt-send-email-mst@kernel.org> <55e8930c-2695-365f-a07b-3ad169654d28@redhat.com> <20190725042651-mutt-send-email-mst@kernel.org> <84bb2e31-0606-adff-cf2a-e1878225a847@redhat.com> <20190725092332-mutt-send-email-mst@kernel.org> <11802a8a-ce41-f427-63d5-b6a4cf96bb3f@redhat.com> <20190726074644-mutt-send-email-mst@kernel.org> <5cc94f15-b229-a290-55f3-8295266edb2b@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <5cc94f15-b229-a290-55f3-8295266edb2b@redhat.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190726_053824_991154_9E88C5D4 X-CRM114-Status: GOOD ( 23.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mhocko@suse.com, peterz@infradead.org, ldv@altlinux.org, james.bottomley@hansenpartnership.com, linux-mm@kvack.org, namit@vmware.com, mingo@kernel.org, elena.reshetova@intel.com, keescook@chromium.org, aarcange@redhat.com, davem@davemloft.net, hch@infradead.org, christian@brauner.io, syzbot , syzkaller-bugs@googlegroups.com, jglisse@redhat.com, viro@zeniv.linux.org.uk, linux-arm-kernel@lists.infradead.org, wad@chromium.org, linux-parisc@vger.kernel.org, linux-kernel@vger.kernel.org, luto@amacapital.net, ebiederm@xmission.com, akpm@linux-foundation.org, guro@fb.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gRnJpLCBKdWwgMjYsIDIwMTkgYXQgMDg6MDA6NThQTSArMDgwMCwgSmFzb24gV2FuZyB3cm90 ZToKPiAKPiBPbiAyMDE5LzcvMjYg5LiL5Y2INzo0OSwgTWljaGFlbCBTLiBUc2lya2luIHdyb3Rl Ogo+ID4gT24gVGh1LCBKdWwgMjUsIDIwMTkgYXQgMTA6MjU6MjVQTSArMDgwMCwgSmFzb24gV2Fu ZyB3cm90ZToKPiA+ID4gT24gMjAxOS83LzI1IOS4i+WNiDk6MjYsIE1pY2hhZWwgUy4gVHNpcmtp biB3cm90ZToKPiA+ID4gPiA+IEV4YWN0bHksIGFuZCB0aGF0J3MgdGhlIHJlYXNvbiBhY3R1YWxs eSBJIHVzZSBzeW5jaHJvbml6ZV9yY3UoKSB0aGVyZS4KPiA+ID4gPiA+IAo+ID4gPiA+ID4gU28g dGhlIGNvbmNlcm4gaXMgc3RpbGwgdGhlIHBvc3NpYmxlIHN5bmNocm9uaXplX2V4cGVkaXRlZCgp Pwo+ID4gPiA+IEkgdGhpbmsgc3luY2hyb25pemVfc3JjdV9leHBlZGl0ZWQuCj4gPiA+ID4gCj4g PiA+ID4gc3luY2hyb25pemVfZXhwZWRpdGVkIHNlbmRzIGxvdHMgb2YgSVBJIGFuZCBpcyBiYWQg Zm9yIHJlYWx0aW1lIFZNcy4KPiA+ID4gPiAKPiA+ID4gPiA+IENhbiBJIGRvIHRoaXMKPiA+ID4g PiA+IG9uIHRocm91Z2ggYW5vdGhlciBzZXJpZXMgb24gdG9wIG9mIHRoZSBpbmNvbWluZyBWMj8K PiA+ID4gPiA+IAo+ID4gPiA+ID4gVGhhbmtzCj4gPiA+ID4gPiAKPiA+ID4gPiBUaGUgcXVlc3Rp b24gaXMgdGhpczogaXMgdGhpcyBzdGlsbCBhIGdhaW4gaWYgd2Ugc3dpdGNoIHRvIHRoZQo+ID4g PiA+IG1vcmUgZXhwZW5zaXZlIHNyY3U/IElmIHllcyB0aGVuIHdlIGNhbiBrZWVwIHRoZSBmZWF0 dXJlIG9uLAo+ID4gPiAKPiA+ID4gSSB0aGluayB3ZSBvbmx5IGNhcmUgYWJvdXQgdGhlIGNvc3Qg b24gc3JjdV9yZWFkX2xvY2soKSB3aGljaCBsb29rcyBwcmV0dHkKPiA+ID4gdGlueSBmb3JtIG15 IHBvaW50IG9mIHZpZXcuIFdoaWNoIGlzIGJhc2ljYWxseSBhIFJFQURfT05DRSgpICsgV1JJVEVf T05DRSgpLgo+ID4gPiAKPiA+ID4gT2YgY291cnNlIEkgY2FuIGJlbmNobWFyayB0byBzZWUgdGhl IGRpZmZlcmVuY2UuCj4gPiA+IAo+ID4gPiAKPiA+ID4gPiBpZiBub3Qgd2UnbGwgcHV0IGl0IG9m ZiB1bnRpbCBuZXh0IHJlbGVhc2UgYW5kIHRoaW5rCj4gPiA+ID4gb2YgYmV0dGVyIHNvbHV0aW9u cy4gcmN1LT5zcmN1IGlzIGp1c3QgYSBmaW5kIGFuZCByZXBsYWNlLAo+ID4gPiA+IGRvbid0IHNl ZSB3aHkgd2UgbmVlZCB0byBkZWZlciB0aGF0LiBjYW4gYmUgYSBzZXBhcmF0ZSBwYXRjaAo+ID4g PiA+IGZvciBzdXJlLCBidXQgd2UgbmVlZCB0byBrbm93IGhvdyB3ZWxsIGl0IHdvcmtzLgo+ID4g PiAKPiA+ID4gSSB0aGluayBJIGdldCBoZXJlLCBsZXQgbWUgdHJ5IHRvIGRvIHRoYXQgaW4gVjIg YW5kIGxldCdzIHNlZSB0aGUgbnVtYmVycy4KPiA+ID4gCj4gPiA+IFRoYW5rcwo+IAo+IAo+IEl0 IGxvb2tzIHRvIG1lIGZvciB0cmVlIHJjdSwgaXRzIHNyY3VfcmVhZF9sb2NrKCkgaGF2ZSBhIG1i KCkgd2hpY2ggaXMgdG9vCj4gZXhwZW5zaXZlIGZvciB1cy4KCkkgd2lsbCB0cnkgdG8gcG9uZGVy IHVzaW5nIHZxIGxvY2sgaW4gc29tZSB3YXkuCk1heWJlIHdpdGggdHJ5bG9jayBzb21laG93IC4u LgoKCj4gSWYgd2UganVzdCB3b3JyeSBhYm91dCB0aGUgSVBJLAoKV2l0aCBzeW5jaHJvbml6ZV9y Y3Ugd2hhdCBJIHdvdWxkIHdvcnJ5IGFib3V0IGlzIHRoYXQgZ3Vlc3QgaXMgc3RhbGxlZApiZWNh dXNlIHN5c3RlbSBpcyBidXN5IGJlY2F1c2Ugb2Ygb3RoZXIgZ3Vlc3RzLgpXaXRoIGV4cGVkaXRl ZCBpdCdzIHRoZSBJUElzLi4uCgoKPiBjYW4gd2UgZG8gc29tZXRoaW5nIGxpa2UgaW4KPiB2aG9z dF9pbnZhbGlkYXRlX3ZxX3N0YXJ0KCk/Cj4gCj4gwqDCoMKgwqDCoMKgwqAgaWYgKG1hcCkgewo+ IMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCAvKiBJbiBvcmRlciB0byBhdm9pZCBwb3Nz aWJsZSBJUElzIHdpdGgKPiDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCAqIHN5bmNo cm9uaXplX3JjdV9leHBlZGl0ZWQoKSB3ZSB1c2UgY2FsbF9yY3UoKSArCj4gwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqAgKiBjb21wbGV0aW9uLgo+ICovCj4gaW5pdF9jb21wbGV0aW9u KCZjLmNvbXBsZXRpb24pOwo+IMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBjYWxsX3Jj dSgmYy5yY3VfaGVhZCwgdmhvc3RfZmluaXNoX3ZxX2ludmFsaWRhdGlvbik7Cj4gd2FpdF9mb3Jf Y29tcGxldGlvbigmYy5jb21wbGV0aW9uKTsKPiDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqAgdmhvc3Rfc2V0X21hcF9kaXJ0eSh2cSwgbWFwLCBpbmRleCk7Cj4gdmhvc3RfbWFwX3VucHJl ZmV0Y2gobWFwKTsKPiDCoMKgwqDCoMKgwqDCoCB9Cj4gCj4gPwoKV2h5IHdvdWxkIHRoYXQgYmUg ZmFzdGVyIHRoYW4gc3luY2hyb25pemVfcmN1PwoKCgo+IAo+ID4gVGhlcmUncyBvbmUgb3RoZXIg dGhpbmcgdGhhdCBib3RoZXJzIG1lLCBhbmQgdGhhdCBpcyB0aGF0Cj4gPiBmb3IgbGFyZ2Ugcmlu Z3Mgd2hpY2ggYXJlIG5vdCBwaHlzaWNhbGx5IGNvbnRpZ3VvdXMKPiA+IHdlIGRvbid0IGltcGxl bWVudCB0aGUgb3B0aW1pemF0aW9uLgo+ID4gCj4gPiBGb3Igc3VyZSwgdGhhdCBjYW4gd2FpdCwg YnV0IEkgdGhpbmsgZXZlbnR1YWxseSB3ZSBzaG91bGQKPiA+IHZtYXAgbGFyZ2UgcmluZ3MuCj4g Cj4gCj4gWWVzLCB3b3J0aCB0byB0cnkuIEJ1dCB1c2luZyBkaXJlY3QgbWFwIGhhcyBpdHMgb3du IGFkdmFudGFnZTogaXQgY2FuIHVzZQo+IGh1Z2VwYWdlIHRoYXQgdm1hcCBjYW4ndAo+IAo+IFRo YW5rcwoKU3VyZSwgc28gd2UgY2FuIGRvIHRoYXQgZm9yIHNtYWxsIHJpbmdzLgoKLS0gCk1TVAoK X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJt LWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3Jn Cmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtl cm5lbAo=