From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dario Faggioli Subject: [PATCH 01/19] xen: sched: leave CPUs doing tasklet work alone. Date: Sat, 18 Jun 2016 01:11:22 +0200 Message-ID: <146620508199.29766.7439697154591443704.stgit@Solace.fritz.box> References: <146620492155.29766.10321123657058307698.stgit@Solace.fritz.box> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta6.messagelabs.com ([85.158.143.247]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bE2v8-0002y3-8V for xen-devel@lists.xenproject.org; Fri, 17 Jun 2016 23:11:26 +0000 Received: by mail-wm0-f67.google.com with SMTP id k184so1081342wme.2 for ; Fri, 17 Jun 2016 16:11:24 -0700 (PDT) In-Reply-To: <146620492155.29766.10321123657058307698.stgit@Solace.fritz.box> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: xen-devel@lists.xenproject.org Cc: Anshul Makkar , George Dunlap , David Vrabel List-Id: xen-devel@lists.xenproject.org SW4gYm90aCBDcmVkaXQxIGFuZCBDcmVkaXQyLCBzdG9wIGNvbnNpZGVyaW5nIGEgcENQVSBpZGxl LAppZiB0aGUgcmVhc29uIHdoeSB0aGUgaWRsZSB2Q1BVIGlzIGJlaW5nIHNlbGVjdGVkLCBpcyB0 bwpkbyB0YXNrbGV0IHdvcmsuCgpOb3QgZG9pbmcgc28gbWVhbnMgdGhhdCB0aGUgdGlja2xpbmcg YW5kIGxvYWQgYmFsYW5jaW5nCmxvZ2ljLCBzZWVpbmcgdGhlIHBDUFUgYXMgaWRsZSwgY29uc2lk ZXJzIGl0IGEgY2FuZGlkYXRlCmZvciBwaWNraW5nIHVwIHZDUFVzLiBCdXQgdGhlIHBDUFUgd29u J3QgYWN0dWFsbHkgcGljawp1cCBvciBzY2hlZHVsZSBhbnkgdkNQVSwgd2hpY2ggd291bGQgdGhl biByZW1haW4gaW4gdGhlCnJ1bnF1ZXVlLCB3aGljaCBpcyBiYXMsIGVzcGVjaWFsbHkgaWYgdGhl cmUgd2VyZSBvdGhlciwKdHJ1bHkgaWRsZSBwQ1BVcywgdGhhdCBjb3VsZCBleGVjdXRlIGl0LgoK VGhlIG9ubHkgZHJhd2JhY2sgaXMgdGhhdCB3ZSBjYW4ndCBhc3N1bWUgdGhhdCBhIHBDUFUgaXMK aW4gYWx3YXlzIG1hcmtlZCBhcyBpZGxlIHdoZW4gYmVpbmcgcmVtb3ZlZCBmcm9tIGFuCmluc3Rh bmNlIG9mIHRoZSBDcmVkaXQyIHNjaGVkdWxlciAoY3NjaGVkMl9kZWluaXRfcGRhdGEpLgpJbiBm YWN0LCBpZiB3ZSBhcmUgaW4gc3RvcC1tYWNoaW5lIChpLmUuLCBkdXJpbmcgc3VzcGVuZApvciBz aHV0ZG93biksIHRoZSBwQ1BVcyBhcmUgcnVubmluZyB0aGUgc3RvcG1hY2hpbmVfdGFza2xldAph bmQgaGVuY2UgYXJlIGFjdHVhbGx5IG1hcmtlZCBhcyBidXN5LiBPbiB0aGUgb3RoZXIgaGFuZCwK d2hlbiByZW1vdmluZyBhIHBDUFUgZnJvbSBhIENyZWRpdDIgcG9vbCwgaXQgd2lsbCBpbmRlZWQK YmUgaWRsZS4gVGhlIG9ubHkgdGhpbmcgd2UgY2FuIGRvLCB0aGVyZWZvcmUsIGlzIHRvCnJlbW92 ZSB0aGUgQlVHX09OKCkgY2hlY2suCgpTaWduZWQtb2ZmLWJ5OiBEYXJpbyBGYWdnaW9saSA8ZGFy aW8uZmFnZ2lvbGlAY2l0cml4LmNvbT4KLS0tCkNjOiBHZW9yZ2UgRHVubGFwIDxnZW9yZ2UuZHVu bGFwQGNpdHJpeC5jb20+CkNjOiBBbnNodWwgTWFra2FyIDxhbnNodWwubWFra2FyQGNpdHJpeC5j b20+CkNjOiBEYXZpZCBWcmFiZWwgPGRhdmlkLnZyYWJlbEBjaXRyaXguY29tPgotLS0KIHhlbi9j b21tb24vc2NoZWRfY3JlZGl0LmMgIHwgICAxMiArKysrKystLS0tLS0KIHhlbi9jb21tb24vc2No ZWRfY3JlZGl0Mi5jIHwgICAxNCArKysrKysrKysrLS0tLQogMiBmaWxlcyBjaGFuZ2VkLCAxNiBp bnNlcnRpb25zKCspLCAxMCBkZWxldGlvbnMoLSkKCmRpZmYgLS1naXQgYS94ZW4vY29tbW9uL3Nj aGVkX2NyZWRpdC5jIGIveGVuL2NvbW1vbi9zY2hlZF9jcmVkaXQuYwppbmRleCBhMzhhNjNkLi5h NjY0NWEyIDEwMDY0NAotLS0gYS94ZW4vY29tbW9uL3NjaGVkX2NyZWRpdC5jCisrKyBiL3hlbi9j b21tb24vc2NoZWRfY3JlZGl0LmMKQEAgLTE4MTksMjQgKzE4MTksMjQgQEAgY3NjaGVkX3NjaGVk dWxlKAogICAgIGVsc2UKICAgICAgICAgc25leHQgPSBjc2NoZWRfbG9hZF9iYWxhbmNlKHBydiwg Y3B1LCBzbmV4dCwgJnJldC5taWdyYXRlZCk7CiAKKyBvdXQ6CiAgICAgLyoKICAgICAgKiBVcGRh dGUgaWRsZXJzIG1hc2sgaWYgbmVjZXNzYXJ5LiBXaGVuIHdlJ3JlIGlkbGluZywgb3RoZXIgQ1BV cwogICAgICAqIHdpbGwgdGlja2xlIHVzIHdoZW4gdGhleSBnZXQgZXh0cmEgd29yay4KICAgICAg Ki8KLSAgICBpZiAoIHNuZXh0LT5wcmkgPT0gQ1NDSEVEX1BSSV9JRExFICkKKyAgICBpZiAoIHRh c2tsZXRfd29ya19zY2hlZHVsZWQgfHwgc25leHQtPnByaSAhPSBDU0NIRURfUFJJX0lETEUgKQog ICAgIHsKLSAgICAgICAgaWYgKCAhY3B1bWFza190ZXN0X2NwdShjcHUsIHBydi0+aWRsZXJzKSAp Ci0gICAgICAgICAgICBjcHVtYXNrX3NldF9jcHUoY3B1LCBwcnYtPmlkbGVycyk7CisgICAgICAg IGlmICggY3B1bWFza190ZXN0X2NwdShjcHUsIHBydi0+aWRsZXJzKSApCisgICAgICAgICAgICBj cHVtYXNrX2NsZWFyX2NwdShjcHUsIHBydi0+aWRsZXJzKTsKICAgICB9Ci0gICAgZWxzZSBpZiAo IGNwdW1hc2tfdGVzdF9jcHUoY3B1LCBwcnYtPmlkbGVycykgKQorICAgIGVsc2UgaWYgKCAhY3B1 bWFza190ZXN0X2NwdShjcHUsIHBydi0+aWRsZXJzKSApCiAgICAgewotICAgICAgICBjcHVtYXNr X2NsZWFyX2NwdShjcHUsIHBydi0+aWRsZXJzKTsKKyAgICAgICAgY3B1bWFza19zZXRfY3B1KGNw dSwgcHJ2LT5pZGxlcnMpOwogICAgIH0KIAogICAgIGlmICggIWlzX2lkbGVfdmNwdShzbmV4dC0+ dmNwdSkgKQogICAgICAgICBzbmV4dC0+c3RhcnRfdGltZSArPSBub3c7CiAKLW91dDoKICAgICAv KgogICAgICAqIFJldHVybiB0YXNrIHRvIHJ1biBuZXh0Li4uCiAgICAgICovCmRpZmYgLS1naXQg YS94ZW4vY29tbW9uL3NjaGVkX2NyZWRpdDIuYyBiL3hlbi9jb21tb24vc2NoZWRfY3JlZGl0Mi5j CmluZGV4IDE5MzNmZjEuLmNmODQ1NWMgMTAwNjQ0Ci0tLSBhL3hlbi9jb21tb24vc2NoZWRfY3Jl ZGl0Mi5jCisrKyBiL3hlbi9jb21tb24vc2NoZWRfY3JlZGl0Mi5jCkBAIC0xOTEwLDggKzE5MTAs MTYgQEAgY3NjaGVkMl9zY2hlZHVsZSgKICAgICB9CiAgICAgZWxzZQogICAgIHsKLSAgICAgICAg LyogVXBkYXRlIHRoZSBpZGxlIG1hc2sgaWYgbmVjZXNzYXJ5ICovCi0gICAgICAgIGlmICggIWNw dW1hc2tfdGVzdF9jcHUoY3B1LCAmcnFkLT5pZGxlKSApCisgICAgICAgIC8qCisgICAgICAgICAq IFVwZGF0ZSB0aGUgaWRsZSBtYXNrIGlmIG5lY2Vzc2FyeS4gTm90ZSB0aGF0LCBpZiB3ZSdyZSBz Y2hlZHVsaW5nCisgICAgICAgICAqIGlkbGUgaW4gb3JkZXIgdG8gY2Fycnkgb24gc29tZSB0YXNr bGV0IHdvcmssIHdlIHdhbnQgdG8gcGxheSBidXN5IQorICAgICAgICAgKi8KKyAgICAgICAgaWYg KCB0YXNrbGV0X3dvcmtfc2NoZWR1bGVkICkKKyAgICAgICAgeworICAgICAgICAgICAgaWYgKCBj cHVtYXNrX3Rlc3RfY3B1KGNwdSwgJnJxZC0+aWRsZSkgKQorICAgICAgICAgICAgICAgIGNwdW1h c2tfY2xlYXJfY3B1KGNwdSwgJnJxZC0+aWRsZSk7CisgICAgICAgIH0KKyAgICAgICAgZWxzZSBp ZiAoICFjcHVtYXNrX3Rlc3RfY3B1KGNwdSwgJnJxZC0+aWRsZSkgKQogICAgICAgICAgICAgY3B1 bWFza19zZXRfY3B1KGNwdSwgJnJxZC0+aWRsZSk7CiAgICAgICAgIC8qIE1ha2Ugc3VyZSBhdmds b2FkIGdldHMgdXBkYXRlZCBwZXJpb2RpY2FsbHkgZXZlbgogICAgICAgICAgKiBpZiB0aGVyZSdz IG5vIGFjdGl2aXR5ICovCkBAIC0yMjkxLDggKzIyOTksNiBAQCBjc2NoZWQyX2RlaW5pdF9wZGF0 YShjb25zdCBzdHJ1Y3Qgc2NoZWR1bGVyICpvcHMsIHZvaWQgKnBjcHUsIGludCBjcHUpCiAgICAg LyogTm8gbmVlZCB0byBzYXZlIElSUXMgaGVyZSwgdGhleSdyZSBhbHJlYWR5IGRpc2FibGVkICov CiAgICAgc3Bpbl9sb2NrKCZycWQtPmxvY2spOwogCi0gICAgQlVHX09OKCFjcHVtYXNrX3Rlc3Rf Y3B1KGNwdSwgJnJxZC0+aWRsZSkpOwotCiAgICAgcHJpbnRrKCJSZW1vdmluZyBjcHUgJWQgZnJv bSBydW5xdWV1ZSAlZFxuIiwgY3B1LCBycWkpOwogCiAgICAgY3B1bWFza19jbGVhcl9jcHUoY3B1 LCAmcnFkLT5pZGxlKTsKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0 dHA6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=