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Tsirkin" To: Jason Wang Subject: Re: WARNING in __mmdrop Message-ID: <20190723035725-mutt-send-email-mst@kernel.org> References: <000000000000964b0d058e1a0483@google.com> <20190721044615-mutt-send-email-mst@kernel.org> <20190721081447-mutt-send-email-mst@kernel.org> <85dd00e2-37a6-72b7-5d5a-8bf46a3526cf@redhat.com> <20190722040230-mutt-send-email-mst@kernel.org> <4bd2ff78-6871-55f2-44dc-0982ffef3337@redhat.com> <20190723010019-mutt-send-email-mst@kernel.org> <20190723032024-mutt-send-email-mst@kernel.org> <1d14de4d-0133-1614-9f64-3ded381de04e@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1d14de4d-0133-1614-9f64-3ded381de04e@redhat.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190723_011038_619931_29401DD0 X-CRM114-Status: GOOD ( 22.90 ) 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 T24gVHVlLCBKdWwgMjMsIDIwMTkgYXQgMDM6NTM6MDZQTSArMDgwMCwgSmFzb24gV2FuZyB3cm90 ZToKPiAKPiBPbiAyMDE5LzcvMjMg5LiL5Y2IMzoyMywgTWljaGFlbCBTLiBUc2lya2luIHdyb3Rl Ogo+ID4gPiA+IFJlYWxseSBsZXQncyBqdXN0IHVzZSBrZnJlZV9yY3UuIEl0J3Mgd2F5IGNsZWFu ZXI6IGZpcmUgYW5kIGZvcmdldC4KPiA+ID4gTG9va3Mgbm90LCB5b3UgbmVlZCByYXRlIGxpbWl0 IHRoZSBmaXJlIGFzIHlvdSd2ZSBmaWd1cmVkIG91dD8KPiA+IFNlZSB0aGUgZGlzY3Vzc2lvbiB0 aGF0IGZvbGxvd2VkLiBCYXNpY2FsbHkgbm8sIGl0J3MgZ29vZCBlbm91Z2gKPiA+IGFscmVhZHkg YW5kIGlzIG9ubHkgZ29pbmcgdG8gYmUgYmV0dGVyLgo+ID4gCj4gPiA+IEFuZCBpbiBmYWN0LAo+ ID4gPiB0aGUgc3luY2hyb25pemF0aW9uIGlzIG5vdCBldmVuIG5lZWRlZCwgZG9lcyBpdCBoZWxw IGlmIEkgbGVhdmUgYSBjb21tZW50IHRvCj4gPiA+IGV4cGxhaW4/Cj4gPiBMZXQncyB0cnkgdG8g ZmlndXJlIGl0IG91dCBpbiB0aGUgbWFpbCBmaXJzdC4gSSdtIHByZXR0eSBzdXJlIHRoZQo+ID4g Y3VycmVudCBsb2dpYyBpcyB3cm9uZy4KPiAKPiAKPiBIZXJlIGlzIHdoYXQgdGhlIGNvZGUgd2hh dCB0byBhY2hpZXZlOgo+IAo+IC0gVGhlIG1hcCB3YXMgcHJvdGVjdGVkIGJ5IFJDVQo+IAo+IC0g V3JpdGVycyBhcmU6IE1NVSBub3RpZmllciBpbnZhbGlkYXRpb24gY2FsbGJhY2tzLCBmaWxlIG9w ZXJhdGlvbnMgKGlvY3Rscwo+IGV0YyksIG1ldGFfcHJlZmV0Y2ggKGRhdGFwYXRoKQo+IAo+IC0g UmVhZGVycyBhcmU6IG1lbW9yeSBhY2Nlc3Nvcgo+IAo+IFdyaXRlciBhcmUgc3luY2hyb25pemVk IHRocm91Z2ggbW11X2xvY2suIFJDVSBpcyB1c2VkIHRvIHN5bmNocm9uaXplZAo+IGJldHdlZW4g d3JpdGVycyBhbmQgcmVhZGVycy4KPiAKPiBUaGUgc3luY2hyb25pemVfcmN1KCkgaW4gdmhvc3Rf cmVzZXRfdnFfbWFwcygpIHdhcyB1c2VkIHRvIHN5bmNocm9uaXplZCBpdAo+IHdpdGggcmVhZGVy cyAobWVtb3J5IGFjY2Vzc29ycykgaW4gdGhlIHBhdGggb2YgZmlsZSBvcGVyYXRpb25zLiBCdXQg aW4gdGhpcwo+IGNhc2UsIHZxLT5tdXRleCB3YXMgYWxyZWFkeSBoZWxkLCB0aGlzIG1lYW5zIGl0 IGhhcyBiZWVuIHNlcmlhbGl6ZWQgd2l0aAo+IG1lbW9yeSBhY2Nlc3Nvci4gVGhhdCdzIHdoeSBJ IHRoaW5rIGl0IGNvdWxkIGJlIHJlbW92ZWQgc2FmZWx5Lgo+IAo+IEFueXRoaW5nIEkgbWlzcyBo ZXJlPwo+IAoKU28gaW52YWxpZGF0ZSBjYWxsYmFja3MgbmVlZCB0byByZXNldCB0aGUgbWFwLCBh bmQgdGhleSBkbwpub3QgaGF2ZSB2cSBtdXRleC4gSG93IGNhbiB0aGV5IGRvIHRoaXMgYW5kIGZy ZWUKdGhlIG1hcCBzYWZlbHk/IFRoZXkgbmVlZCBzeW5jaHJvbml6ZV9yY3Ugb3Iga2ZyZWVfcmN1 IHJpZ2h0PwoKQW5kIEkgd29ycnkgc29tZXdoYXQgdGhhdCBzeW5jaHJvbml6ZV9yY3UgaW4gYW4g TU1VIG5vdGlmaWVyCmlzIGEgcHJvYmxlbSwgTU1VIG5vdGlmaWVycyBhcmUgc3VwcG9zZWQgdG8g YmUgcXVpY2s6CnRoZXkgYXJlIG9uIGEgcmVhZCBzaWRlIGNyaXRpY2FsIHNlY3Rpb24gb2YgU1JD VS4KCklmIHdlIGNvdWxkIGdldCByaWQgb2YgUkNVIHRoYXQgd291bGQgYmUgZXZlbiBiZXR0ZXIu CgpCdXQgbm93IEkgd29uZGVyOgoJaW52YWxpZGF0ZV9zdGFydCBoYXMgdG8gbWFyayBwYWdlIGFz IGRpcnR5CgkodGhpcyBpcyB3aGF0IG15IHBhdGNoIGFkZGVkLCBjdXJyZW50IGNvZGUgbWlzc2Vz IHRoaXMpLgoKCWF0IHRoYXQgcG9pbnQga2VybmVsIGNhbiBjb21lIGFuZCBtYWtlIHRoZSBwYWdl IGNsZWFuIGFnYWluLgoKCUF0IHRoYXQgcG9pbnQgVlEgaGFuZGxlcnMgY2FuIGtlZXAgYSBjb3B5 IG9mIHRoZSBtYXAKCWFuZCBjaGFuZ2UgdGhlIHBhZ2UgYWdhaW4uCgoKQXQgdGhpcyBwb2ludCBJ IGRvbid0IHVuZGVyc3RhbmQgaG93IHdlIGNhbiBtYXJrIHBhZ2UgZGlydHkKc2FmZWx5LgoKPiA+ IAo+ID4gPiA+ID4gQnR3LCBmb3Iga3ZtIGlvY3RsIGl0IHN0aWxsIHVzZXMgc3luY2hyb25pemVf cmN1KCkgaW4ga3ZtX3ZjcHVfaW9jdGwoKSwKPiA+ID4gPiA+IChqdXN0IGEgbGl0dGxlIGJpdCBt b3JlIGhhcmQgdG8gdHJpZ2dlcik6Cj4gPiA+ID4gQUZBSUsgdGhlc2UgbmV2ZXIgcnVuIGluIHJl c3BvbnNlIHRvIGd1ZXN0IGV2ZW50cy4KPiA+ID4gPiBTbyB0aGV5IGNhbiB0YWtlIHZlcnkgbG9u ZyBhbmQgZ3Vlc3RzIHN0aWxsIHdvbid0IGNyYXNoLgo+ID4gPiBXaGF0IGlmIGd1ZXN0IG1hbmFn ZXMgdG8gZXNjYXBlIHRvIHFlbXU/Cj4gPiA+IAo+ID4gPiBUaGFua3MKPiA+IFRoZW4gaXQncyBn b2luZyB0byBiZSBzbG93LiBXaHkgZG8gd2UgY2FyZT8KPiA+IFdoYXQgd2UgZG8gbm90IHdhbnQg aXMgc3luY2hyb25pemVfcmN1IHRoYXQgZ3Vlc3QgaXMgYmxvY2tlZCBvbi4KPiA+IAo+IAo+IE9r LCB0aGlzIGxvb2tzIGxpa2UgdGhhdCBJIGhhdmUgc29tZSBtaXN1bmRlcnN0YW5kaW5nIGhlcmUg b2YgdGhlIHJlYXNvbiB3aHkKPiBzeW5jaHJvbml6ZV9yY3UoKSBpcyBub3QgcHJlZmVyYWJsZSBp biB0aGUgcGF0aCBvZiBpb2N0bC4gQnV0IGluIGt2bSBjYXNlLAo+IGlmIHJjdV9leHBlZGl0ZWQg aXMgc2V0LCBpdCBjYW4gdHJpZ2dlcnMgSVBJcyBBRkFJSy4KPiAKPiBUaGFua3MKPgoKWWVzLCBl eHBlZGl0ZWQgaXMgbm90IGdvb2QgZm9yIHNvbWV0aGluZyBndWVzdCBjYW4gdHJpZ2dlci4KTGV0 J3MganVzdCB1c2Uga2ZyZWVfcmN1IGlmIHdlIGNhbi4gUGF1bCBzYWlkIGV2ZW4gdGhvdWdoCmRv Y3VtZW50YXRpb24gc3RpbGwgc2F5cyBpdCBuZWVkcyB0byBiZSByYXRlLWxpbWl0ZWQsIHRoYXQK cGFydCBpcyBiYXNpY2FsbHkgc3RhbGUgYW5kIHdpbGwgZ2V0IHVwZGF0ZWQuCgotLSAKTVNUIAoK X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJt LWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3Jn Cmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtl cm5lbAo=