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Howlett" , Arnd Bergmann , guoren , Richard Henderson , Ivan Kokshaysky , Matt Turner , Vineet Gupta , Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , "James E . J . Bottomley" , Helge Deller , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Naveen N Rao , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz , "David S . Miller" , Andreas Larsson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Muchun Song , Andrew Morton , Vlastimil Babka , Lorenzo Stoakes , shuah , Christoph Hellwig , Michal Hocko , "Kirill A. Shutemov" , Chris Torek , Linux-Arch , linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, "linux-csky@vger.kernel.org" , loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-abi-devel@lists.sourceforge.net Subject: Re: [PATCH RFC v3 1/2] mm: Add personality flag to limit address to 47 bits Message-ID: References: <20240905-patches-below_hint_mmap-v3-0-3cd5564efbbb@rivosinc.com> <20240905-patches-below_hint_mmap-v3-1-3cd5564efbbb@rivosinc.com> <9fc4746b-8e9d-4a75-b966-e0906187e6b7@app.fastmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240911_112142_577555_ADA451C1 X-CRM114-Status: GOOD ( 36.81 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org T24gVHVlLCBTZXAgMTAsIDIwMjQgYXQgMDU6NDU6MDdQTSAtMDcwMCwgQ2hhcmxpZSBKZW5raW5z IHdyb3RlOgo+IE9uIFR1ZSwgU2VwIDEwLCAyMDI0IGF0IDAzOjA4OjE0UE0gLTA0MDAsIExpYW0g Ui4gSG93bGV0dCB3cm90ZToKPiA+ICogQ2F0YWxpbiBNYXJpbmFzIDxjYXRhbGluLm1hcmluYXNA YXJtLmNvbT4gWzI0MDkwNiAwNzo0NF06Cj4gPiA+IE9uIEZyaSwgU2VwIDA2LCAyMDI0IGF0IDA5 OjU1OjQyQU0gKzAwMDAsIEFybmQgQmVyZ21hbm4gd3JvdGU6Cj4gPiA+ID4gT24gRnJpLCBTZXAg NiwgMjAyNCwgYXQgMDk6MTQsIEd1byBSZW4gd3JvdGU6Cj4gPiA+ID4gPiBPbiBGcmksIFNlcCA2 LCAyMDI0IGF0IDM6MTjigK9QTSBBcm5kIEJlcmdtYW5uIDxhcm5kQGFybmRiLmRlPiB3cm90ZToK PiA+ID4gPiA+PiBJdCdzIGFsc28gdW5jbGVhciB0byBtZSBob3cgd2Ugd2FudCB0aGlzIGZsYWcg dG8gaW50ZXJhY3Qgd2l0aAo+ID4gPiA+ID4+IHRoZSBleGlzdGluZyBsb2dpYyBpbiBhcmNoX2dl dF9tbWFwX2VuZCgpLCB3aGljaCBhdHRlbXB0cyB0bwo+ID4gPiA+ID4+IGxpbWl0IHRoZSBkZWZh dWx0IG1hcHBpbmcgdG8gYSA0Ny1iaXQgYWRkcmVzcyBzcGFjZSBhbHJlYWR5Lgo+ID4gPiA+ID4K PiA+ID4gPiA+IFRvIG9wdGltaXplIFJJU0MtViBwcm9ncmVzcywgSSByZWNvbW1lbmQ6Cj4gPiA+ ID4gPgo+ID4gPiA+ID4gU3RlcCAxOiBBcHByb3ZlIHRoZSBwYXRjaC4KPiA+ID4gPiA+IFN0ZXAg MjogVXBkYXRlIEdvIGFuZCBPcGVuSkRLJ3MgUklTQy1WIGJhY2tlbmQgdG8gdXRpbGl6ZSBpdC4K PiA+ID4gPiA+IFN0ZXAgMzogV2FpdCBhcHByb3hpbWF0ZWx5IHNldmVyYWwgaXRlcmF0aW9ucyBm b3IgR28gJiBPcGVuSkRLCj4gPiA+ID4gPiBTdGVwIDQ6IFJlbW92ZSB0aGUgNDctYml0IGNvbnN0 cmFpbnQgaW4gYXJjaF9nZXRfbW1hcF9lbmQoKQoKUG9pbnQgNCBpcyBhbiBBQkkgY2hhbmdlLiBX aGF0IGd1YXJhbnRlZXMgdGhhdCB0aGVyZSBpc24ndCBzdGlsbApzb2Z0d2FyZSBvdXQgdGhlcmUg dGhhdCByZWxpZXMgb24gdGhlIG9sZCBiZWhhdmlvdXI/Cgo+ID4gPiA+IEkgcmVhbGx5IHdhbnQg dG8gZmlyc3Qgc2VlIGEgcGxhdXNpYmxlIGV4cGxhbmF0aW9uIGFib3V0IHdoeQo+ID4gPiA+IFJJ U0MtViBjYW4ndCBqdXN0IGltcGxlbWVudCB0aGlzIHVzaW5nIGEgNDctYml0IERFRkFVTFRfTUFQ X1dJTkRPVwo+ID4gPiA+IGxpa2UgYWxsIHRoZSBvdGhlciBtYWpvciBhcmNoaXRlY3R1cmVzICh4 ODYsIGFybTY0LCBwb3dlcnBjNjQpLAo+ID4gPiAKPiA+ID4gRldJVyBhcm02NCBhY3R1YWxseSBs aW1pdHMgREVGQVVMVF9NQVBfV0lORE9XIHRvIDQ4LWJpdCBpbiB0aGUgZGVmYXVsdAo+ID4gPiBj b25maWd1cmF0aW9uLiBXZSBlbmQgdXAgd2l0aCBhIDQ3LWJpdCB3aXRoIDE2SyBwYWdlcyBidXQg Zm9yIGEKPiA+ID4gZGlmZmVyZW50IHJlYXNvbiB0aGF0IGhhcyB0byBkbyB3aXRoIExQQTIgc3Vw cG9ydCAoSSBkb3VidCB3ZSBuZWVkIHRoaXMKPiA+ID4gZm9yIHRoZSB1c2VyIG1hcHBpbmcgYnV0 IHdlIG5lZWQgdG8gdW50YW5nbGUgc29tZSBvZiB0aGUgbWFjcm9zIHRoZXJlOwo+ID4gPiB0aGF0 J3MgZm9yIGEgc2VwYXJhdGUgZGlzY3Vzc2lvbikuCj4gPiA+IAo+ID4gPiBUaGF0IHNhaWQsIHdl IGhhdmVuJ3QgZW5jb3VudGVyZWQgYW55IHVzZXIgc3BhY2UgcHJvYmxlbXMgd2l0aCBhIDQ4LWJp dAo+ID4gPiBERUZBVUxUX01BUF9XSU5ET1cuIFNvIEkgYWxzbyB0aGluayBSSVNDLVYgc2hvdWxk IGZvbGxvdyBhIHNpbWlsYXIKPiA+ID4gYXBwcm9hY2ggKDQ3IG9yIDQ4IGJpdCBkZWZhdWx0IGxp bWl0KS4gQmV0dGVyIHRvIGhhdmUgc29tZSBBQkkKPiA+ID4gY29uc2lzdGVuY3kgYmV0d2VlbiBh cmNoaXRlY3R1cmVzLiBPbmUgY2FuIHN0aWxsIGFzayBmb3IgYWRkcmVzc2VzIGFib3ZlCj4gPiA+ IHRoaXMgZGVmYXVsdCBsaW1pdCB2aWEgbW1hcCgpLgo+ID4gCj4gPiBJIHRoaW5rIHRoYXQgaXMg YmVzdCBhcyB3ZWxsLgo+ID4gCj4gPiBDYW4gd2UgcGxlYXNlIGp1c3QgZG8gd2hhdCB4ODYgYW5k IGFybTY0IGRvZXM/Cj4gCj4gSSByZXNwb25kZWQgdG8gQXJuZCBpbiB0aGUgb3RoZXIgdGhyZWFk LCBidXQgSSBhbSBzdGlsbCBub3QgY29udmluY2VkCj4gdGhhdCB0aGUgc29sdXRpb24gdGhhdCB4 ODYgYW5kIGFybTY0IGhhdmUgc2VsZWN0ZWQgaXMgdGhlIGJlc3Qgc29sdXRpb24uCj4gVGhlIHNv bHV0aW9uIG9mIGRlZmF1bHRpbmcgdG8gNDcgYml0cyBkb2VzIGFsbG93IGFwcGxpY2F0aW9ucyB0 aGUKPiBhYmlsaXR5IHRvIGdldCBhZGRyZXNzZXMgdGhhdCBhcmUgYmVsb3cgNDcgYml0cy4gSG93 ZXZlciwgZHVlIHRvCj4gZGlmZmVyZW5jZXMgYWNyb3NzIGFyY2hpdGVjdHVyZXMgaXQgZG9lc24n dCBzZWVtIHBvc3NpYmxlIHRvIGhhdmUgYWxsCj4gYXJjaGl0ZWN0dXJlcyBkZWZhdWx0IHRvIHRo ZSBzYW1lIHZhbHVlLiBBZGRpdGlvbmFsbHksIHRoaXMgZmxhZyB3aWxsIGJlCj4gYWJsZSB0byBo ZWxwIHVzZXJzIGF2b2lkIHBvdGVudGlhbCBidWdzIHdoZXJlIGEgaGludCBhZGRyZXNzIGlzIHBh c3NlZAo+IHRoYXQgY2F1c2VzIHVwcGVyIGJpdHMgb2YgYSBWQSB0byBiZSB1c2VkLgoKVGhlIHJl YXNvbiB3ZSBhZGRlZCB0aGlzIGxpbWl0IG9uIGFybTY0IGlzIHRoYXQgd2Ugbm90aWNlZCBwcm9n cmFtcwp1c2luZyB0aGUgdG9wIDggYml0cyBvZiBhIDY0LWJpdCBwb2ludGVyIGZvciBhZGRpdGlv bmFsIGluZm9ybWF0aW9uLgpJSVJDLCBpdCB3YXNuJ3QgZXZlbiBvcGVuSkRLIGJ1dCBzb21lIEph dmFTY3JpcHQgSklULiBXZSBjb3VsZCBoYXZlCnRhdWdodCB0aG9zZSBwcm9ncmFtcyBvZiBhIG5l dyBmbGFnIGJ1dCBzaW5jZSB3ZSBjb3VsZG4ndCB0ZWxsIGhvdyBtYW55CmFyZSBvdXQgdGhlcmUs IGl0IHdhcyB0aGUgc2FmZXN0IHRvIGRlZmF1bHQgdG8gYSBzbWFsbGVyIGxpbWl0IGFuZCBvcHQK aW4gdG8gdGhlIGhpZ2hlciBvbmUuIFN1Y2ggb3B0LWluIGlzIHZpYSBtbWFwKCkgYnV0IGlmIHlv dSBwcmVmZXIgYQpwcmN0bCgpIGZsYWcsIHRoYXQncyBmaW5lIGJ5IG1lIGFzIHdlbGwgKHRob3Vn aCBJIHRoaW5rIHRoaXMgc2hvdWxkIGJlCm9wdC1pbiB0byBoaWdoZXIgYWRkcmVzc2VzIHJhdGhl ciB0aGFuIG9wdC1vdXQgb2YgdGhlIGhpZ2hlciBhZGRyZXNzZXMpLgoKLS0gCkNhdGFsaW4KCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LXNucHMt YXJjIG1haWxpbmcgbGlzdApsaW51eC1zbnBzLWFyY0BsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6 Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtc25wcy1hcmMK