From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53816) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bcPqM-0008CE-Nr for qemu-devel@nongnu.org; Wed, 24 Aug 2016 00:31:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bcPqJ-0007ir-TW for qemu-devel@nongnu.org; Wed, 24 Aug 2016 00:31:13 -0400 Resent-Message-Id: Reply-To: Message-ID: <20160824043048.109542.39014@ex-std-node742.prod.rhcloud.com> In-Reply-To: <1472012279-20581-1-git-send-email-rth@twiddle.net> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 From: no-reply@patchew.org Date: Tue, 23 Aug 2016 21:30:58 -0700 (PDT) Subject: Re: [Qemu-devel] [PATCH 0/7] Improve buffer_is_zero List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: rth@twiddle.net Cc: famz@redhat.com, qemu-devel@nongnu.org, pbonzini@redhat.com, qemu-arm@nongnu.org, vijay.kilari@gmail.com, peter.maydell@linaro.org SGksCgpZb3VyIHNlcmllcyBzZWVtcyB0byBoYXZlIHNvbWUgY29kaW5nIHN0eWxlIHByb2JsZW1z LiBTZWUgb3V0cHV0IGJlbG93IGZvcgptb3JlIGluZm9ybWF0aW9uOgoKTWVzc2FnZS1pZDogMTQ3 MjAxMjI3OS0yMDU4MS0xLWdpdC1zZW5kLWVtYWlsLXJ0aEB0d2lkZGxlLm5ldApTdWJqZWN0OiBb UWVtdS1kZXZlbF0gW1BBVENIIDAvN10gSW1wcm92ZSBidWZmZXJfaXNfemVybwpUeXBlOiBzZXJp ZXMKCj09PSBURVNUIFNDUklQVCBCRUdJTiA9PT0KIyEvYmluL2Jhc2gKCkJBU0U9YmFzZQpuPTEK dG90YWw9JChnaXQgbG9nIC0tb25lbGluZSAkQkFTRS4uIHwgd2MgLWwpCmZhaWxlZD0wCgojIFVz ZWZ1bCBnaXQgb3B0aW9ucwpnaXQgY29uZmlnIC0tbG9jYWwgZGlmZi5yZW5hbWVsaW1pdCAwCmdp dCBjb25maWcgLS1sb2NhbCBkaWZmLnJlbmFtZXMgVHJ1ZQoKY29tbWl0cz0iJChnaXQgbG9nIC0t Zm9ybWF0PSVIIC0tcmV2ZXJzZSAkQkFTRS4uKSIKZm9yIGMgaW4gJGNvbW1pdHM7IGRvCiAgICBl Y2hvICJDaGVja2luZyBQQVRDSCAkbi8kdG90YWw6ICQoZ2l0IHNob3cgLS1uby1wYXRjaCAtLWZv cm1hdD0lcyAkYykuLi4iCiAgICBpZiAhIGdpdCBzaG93ICRjIC0tZm9ybWF0PWVtYWlsIHwgLi9z Y3JpcHRzL2NoZWNrcGF0Y2gucGwgLS1tYWlsYmFjayAtOyB0aGVuCiAgICAgICAgZmFpbGVkPTEK ICAgICAgICBlY2hvCiAgICBmaQogICAgbj0kKChuKzEpKQpkb25lCgpleGl0ICRmYWlsZWQKPT09 IFRFU1QgU0NSSVBUIEVORCA9PT0KClVwZGF0aW5nIDNjOGNmNWE5YzIxZmY4NzgyMTY0ZDFkZWY3 ZjQ0YmQ4ODg3MTMzODQKRnJvbSBodHRwczovL2dpdGh1Yi5jb20vcGF0Y2hldy1wcm9qZWN0L3Fl bXUKICogW25ldyB0YWddICAgICAgICAgcGF0Y2hldy8xNDcyMDEyMjc5LTIwNTgxLTEtZ2l0LXNl bmQtZW1haWwtcnRoQHR3aWRkbGUubmV0IC0+IHBhdGNoZXcvMTQ3MjAxMjI3OS0yMDU4MS0xLWdp dC1zZW5kLWVtYWlsLXJ0aEB0d2lkZGxlLm5ldApTd2l0Y2hlZCB0byBhIG5ldyBicmFuY2ggJ3Rl c3QnCjEyYTA0YTQgY3V0aWxzOiBSZXdyaXRlIHBwYyBidWZmZXIgemVybyBjaGVja2luZwoyODQx ODk1IGN1dGlsczogUmV3cml0ZSBhYXJjaDY0IGJ1ZmZlciB6ZXJvIGNoZWNraW5nCjAwY2I1NDEg Y3V0aWxzOiBSZXdyaXRlIHg4NiBidWZmZXIgemVybyBjaGVja2luZwo0NTdlMDhlIGN1dGlsczog QWRkIGdlbmVyaWMgcHJlZmV0Y2gKNDA2MzA5MyBjdXRpbHM6IFJlYXJyYW5nZSBidWZmZXJfaXNf emVybyBhY2NlbGVyYXRpb24KNTE0ZjYwMSBjdXRpbHM6IEV4cG9ydCBvbmx5IGJ1ZmZlcl9pc196 ZXJvCmFhYmQ3YjIgY3V0aWxzOiBSZW1vdmUgU1BMQVQgbWFjcm8KCj09PSBPVVRQVVQgQkVHSU4g PT09CkNoZWNraW5nIFBBVENIIDEvNzogY3V0aWxzOiBSZW1vdmUgU1BMQVQgbWFjcm8uLi4KQ2hl Y2tpbmcgUEFUQ0ggMi83OiBjdXRpbHM6IEV4cG9ydCBvbmx5IGJ1ZmZlcl9pc196ZXJvLi4uCkNo ZWNraW5nIFBBVENIIDMvNzogY3V0aWxzOiBSZWFycmFuZ2UgYnVmZmVyX2lzX3plcm8gYWNjZWxl cmF0aW9uLi4uCkVSUk9SOiBleHRlcm5zIHNob3VsZCBiZSBhdm9pZGVkIGluIC5jIGZpbGVzCiMx MjQ6IEZJTEU6IHV0aWwvY3V0aWxzLmM6MTY2OgorZXh0ZXJuIHZvaWQgbGlua19lcnJvcih2b2lk KTsKCkVSUk9SOiBzcGFjZXMgcmVxdWlyZWQgYXJvdW5kIHRoYXQgJyonIChjdHg6VnhWKQojMjE4 OiBGSUxFOiB1dGlsL2N1dGlscy5jOjIyOToKK0FDQ0VMX0JVRkZFUl9aRVJPKGJ1ZmZlcl96ZXJv X2ludCwgNCpzaXplb2YobG9uZyksIGxvbmcsIElERU5UX1pFUk8pCiAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICBeCgpFUlJPUjogYXJjaGl0ZWN0dXJlIHNwZWNpZmljIGRlZmlu ZXMgc2hvdWxkIGJlIGF2b2lkZWQKIzIzODogRklMRTogdXRpbC9jdXRpbHMuYzoyNDM6CisjaWZk ZWYgX19BTFRJVkVDX18KCkVSUk9SOiBzcGFjZSByZXF1aXJlZCBiZWZvcmUgdGhlIG9wZW4gYnJh Y2UgJ3snCiMyNTA6IEZJTEU6IHV0aWwvY3V0aWxzLmM6MjU1OgorI2RlZmluZSBET19aRVJPKFgp ICB2ZWNfYWxsX2VxKFgsIChfX3ZlY3RvciB1bnNpZ25lZCBjaGFyKXsgMCB9KQoKdG90YWw6IDQg ZXJyb3JzLCAwIHdhcm5pbmdzLCA0NDYgbGluZXMgY2hlY2tlZAoKWW91ciBwYXRjaCBoYXMgc3R5 bGUgcHJvYmxlbXMsIHBsZWFzZSByZXZpZXcuICBJZiBhbnkgb2YgdGhlc2UgZXJyb3JzCmFyZSBm YWxzZSBwb3NpdGl2ZXMgcmVwb3J0IHRoZW0gdG8gdGhlIG1haW50YWluZXIsIHNlZQpDSEVDS1BB VENIIGluIE1BSU5UQUlORVJTLgoKQ2hlY2tpbmcgUEFUQ0ggNC83OiBjdXRpbHM6IEFkZCBnZW5l cmljIHByZWZldGNoLi4uCkNoZWNraW5nIFBBVENIIDUvNzogY3V0aWxzOiBSZXdyaXRlIHg4NiBi dWZmZXIgemVybyBjaGVja2luZy4uLgpFUlJPUjogVXNlIG9mIHZvbGF0aWxlIGlzIHVzdWFsbHkg d3Jvbmc6IHNlZSBEb2N1bWVudGF0aW9uL3ZvbGF0aWxlLWNvbnNpZGVyZWQtaGFybWZ1bC50eHQK IzQ0OiBGSUxFOiB1dGlsL2N1dGlscy5jOjI4OToKKyAgICAgICAgX19hc20gdm9sYXRpbGUoInZt b3ZkcXUgLTB4ODAoJTEpLCUwXG5cdCIKCkVSUk9SOiBleHRlcm5zIHNob3VsZCBiZSBhdm9pZGVk IGluIC5jIGZpbGVzCiM0NDogRklMRTogdXRpbC9jdXRpbHMuYzoyODk6CisgICAgICAgIF9fYXNt IHZvbGF0aWxlKCJ2bW92ZHF1IC0weDgwKCUxKSwlMFxuXHQiCgpFUlJPUjogVXNlIG9mIHZvbGF0 aWxlIGlzIHVzdWFsbHkgd3Jvbmc6IHNlZSBEb2N1bWVudGF0aW9uL3ZvbGF0aWxlLWNvbnNpZGVy ZWQtaGFybWZ1bC50eHQKIzcyOiBGSUxFOiB1dGlsL2N1dGlscy5jOjMxNzoKKyAgICAgICAgX19h c20gdm9sYXRpbGUoInZtb3ZkcXUgLTB4NDAoJTEpLCUwXG5cdCIKCkVSUk9SOiBleHRlcm5zIHNo b3VsZCBiZSBhdm9pZGVkIGluIC5jIGZpbGVzCiM3MjogRklMRTogdXRpbC9jdXRpbHMuYzozMTc6 CisgICAgICAgIF9fYXNtIHZvbGF0aWxlKCJ2bW92ZHF1IC0weDQwKCUxKSwlMFxuXHQiCgpFUlJP UjogVXNlIG9mIHZvbGF0aWxlIGlzIHVzdWFsbHkgd3Jvbmc6IHNlZSBEb2N1bWVudGF0aW9uL3Zv bGF0aWxlLWNvbnNpZGVyZWQtaGFybWZ1bC50eHQKIzk4OiBGSUxFOiB1dGlsL2N1dGlscy5jOjM0 MzoKKyAgICAgICAgX19hc20gdm9sYXRpbGUoIm1vdmRxdSAtMHg0MCglNCksJTBcblx0IgoKRVJS T1I6IGV4dGVybnMgc2hvdWxkIGJlIGF2b2lkZWQgaW4gLmMgZmlsZXMKIzk4OiBGSUxFOiB1dGls L2N1dGlscy5jOjM0MzoKKyAgICAgICAgX19hc20gdm9sYXRpbGUoIm1vdmRxdSAtMHg0MCglNCks JTBcblx0IgoKRVJST1I6IFVzZSBvZiB2b2xhdGlsZSBpcyB1c3VhbGx5IHdyb25nOiBzZWUgRG9j dW1lbnRhdGlvbi92b2xhdGlsZS1jb25zaWRlcmVkLWhhcm1mdWwudHh0CiMxMzI6IEZJTEU6IHV0 aWwvY3V0aWxzLmM6Mzc0OgorICAgICAgICBfX2FzbSB2b2xhdGlsZSgibW92ZHF1IC0weDQwKCU0 KSwlMFxuXHQiCgpFUlJPUjogZXh0ZXJucyBzaG91bGQgYmUgYXZvaWRlZCBpbiAuYyBmaWxlcwoj MTMyOiBGSUxFOiB1dGlsL2N1dGlscy5jOjM3NDoKKyAgICAgICAgX19hc20gdm9sYXRpbGUoIm1v dmRxdSAtMHg0MCglNCksJTBcblx0IgoKRVJST1I6IGFyY2hpdGVjdHVyZSBzcGVjaWZpYyBkZWZp bmVzIHNob3VsZCBiZSBhdm9pZGVkCiMxNjY6IEZJTEU6IHV0aWwvY3V0aWxzLmM6NDM5OgorI2lm ZGVmIF9fQVZYMl9fCgpFUlJPUjogYXJjaGl0ZWN0dXJlIHNwZWNpZmljIGRlZmluZXMgc2hvdWxk IGJlIGF2b2lkZWQKIzE2OTogRklMRTogdXRpbC9jdXRpbHMuYzo0NDI6CisjaWZkZWYgX19BVlhf XwoKRVJST1I6IGFyY2hpdGVjdHVyZSBzcGVjaWZpYyBkZWZpbmVzIHNob3VsZCBiZSBhdm9pZGVk CiMxNzI6IEZJTEU6IHV0aWwvY3V0aWxzLmM6NDQ1OgorI2lmZGVmIF9fU1NFNF8xX18KCkVSUk9S OiBhcmNoaXRlY3R1cmUgc3BlY2lmaWMgZGVmaW5lcyBzaG91bGQgYmUgYXZvaWRlZAojMTc1OiBG SUxFOiB1dGlsL2N1dGlscy5jOjQ0ODoKKyNpZmRlZiBfX1NTRTJfXwoKdG90YWw6IDEyIGVycm9y cywgMCB3YXJuaW5ncywgMTk4IGxpbmVzIGNoZWNrZWQKCllvdXIgcGF0Y2ggaGFzIHN0eWxlIHBy b2JsZW1zLCBwbGVhc2UgcmV2aWV3LiAgSWYgYW55IG9mIHRoZXNlIGVycm9ycwphcmUgZmFsc2Ug cG9zaXRpdmVzIHJlcG9ydCB0aGVtIHRvIHRoZSBtYWludGFpbmVyLCBzZWUKQ0hFQ0tQQVRDSCBp biBNQUlOVEFJTkVSUy4KCkNoZWNraW5nIFBBVENIIDYvNzogY3V0aWxzOiBSZXdyaXRlIGFhcmNo NjQgYnVmZmVyIHplcm8gY2hlY2tpbmcuLi4KQ2hlY2tpbmcgUEFUQ0ggNy83OiBjdXRpbHM6IFJl d3JpdGUgcHBjIGJ1ZmZlciB6ZXJvIGNoZWNraW5nLi4uCkVSUk9SOiBVc2Ugb2Ygdm9sYXRpbGUg aXMgdXN1YWxseSB3cm9uZzogc2VlIERvY3VtZW50YXRpb24vdm9sYXRpbGUtY29uc2lkZXJlZC1o YXJtZnVsLnR4dAojMzc6IEZJTEU6IHV0aWwvY3V0aWxzLmM6MjcwOgorICAgICAgICBfX2FzbSB2 b2xhdGlsZSgibHZlYnggJTAsJTQsJTVcblx0IgoKRVJST1I6IGV4dGVybnMgc2hvdWxkIGJlIGF2 b2lkZWQgaW4gLmMgZmlsZXMKIzM3OiBGSUxFOiB1dGlsL2N1dGlscy5jOjI3MDoKKyAgICAgICAg X19hc20gdm9sYXRpbGUoImx2ZWJ4ICUwLCU0LCU1XG5cdCIKCnRvdGFsOiAyIGVycm9ycywgMCB3 YXJuaW5ncywgNDcgbGluZXMgY2hlY2tlZAoKWW91ciBwYXRjaCBoYXMgc3R5bGUgcHJvYmxlbXMs IHBsZWFzZSByZXZpZXcuICBJZiBhbnkgb2YgdGhlc2UgZXJyb3JzCmFyZSBmYWxzZSBwb3NpdGl2 ZXMgcmVwb3J0IHRoZW0gdG8gdGhlIG1haW50YWluZXIsIHNlZQpDSEVDS1BBVENIIGluIE1BSU5U QUlORVJTLgoKPT09IE9VVFBVVCBFTkQgPT09CgpUZXN0IGNvbW1hbmQgZXhpdGVkIHdpdGggY29k ZTogMQoKCi0tLQpFbWFpbCBnZW5lcmF0ZWQgYXV0b21hdGljYWxseSBieSBQYXRjaGV3IFtodHRw Oi8vcGF0Y2hldy5vcmcvXS4KUGxlYXNlIHNlbmQgeW91ciBmZWVkYmFjayB0byBwYXRjaGV3LWRl dmVsQGZyZWVsaXN0cy5vcmc=