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Thu, 5 Mar 2020 17:08:15 +0000 (UTC) Received: from localhost (ovpn-117-104.ams2.redhat.com [10.36.117.104]) by smtp.corp.redhat.com (Postfix) with ESMTP id AE0E31001902; Thu, 5 Mar 2020 17:08:12 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH 1/7] aio-posix: completely stop polling when disabled Date: Thu, 5 Mar 2020 17:08:00 +0000 Message-Id: <20200305170806.1313245-2-stefanha@redhat.com> In-Reply-To: <20200305170806.1313245-1-stefanha@redhat.com> References: <20200305170806.1313245-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: base64 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , Kevin Wolf , qemu-block@nongnu.org, Max Reitz , Stefan Hajnoczi , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" T25lIGl0ZXJhdGlvbiBvZiBwb2xsaW5nIGlzIGFsd2F5cyBwZXJmb3JtZWQgZXZlbiB3aGVuIHBv bGxpbmcgaXMKZGlzYWJsZWQuICBUaGlzIGlzIGRvbmUgYmVjYXVzZToKMS4gVXNlcnNwYWNlIHBv bGxpbmcgaXMgY2hlYXBlciB0aGFuIG1ha2luZyBhIHN5c2NhbGwuICBXZSBtaWdodCBnZXQKICAg bHVja3kuCjIuIFdlIG11c3QgcG9sbCBvbmNlIG1vcmUgYWZ0ZXIgcG9sbGluZyBoYXMgc3RvcHBl ZCBpbiBjYXNlIGFuIGV2ZW50CiAgIG9jY3VycmVkIHdoaWxlIHN0b3BwaW5nIHBvbGxpbmcuCgpI b3dldmVyLCB0aGVyZSBhcmUgZG93bnNpZGVzOgoxLiBQb2xsaW5nIGJlY29tZXMgYSBib3R0bGVu ZWNrIHdoZW4gdGhlIG51bWJlciBvZiBldmVudCBzb3VyY2VzIGlzIHZlcnkKICAgaGlnaC4gIEl0 J3MgbW9yZSBlZmZpY2llbnQgdG8gbW9uaXRvciBmZHMgaW4gdGhhdCBjYXNlLgoyLiBBIGhpZ2gt ZnJlcXVlbmN5IHBvbGxpbmcgZXZlbnQgc291cmNlIGNhbiBzdGFydmUgbm9uLXBvbGxpbmcgZXZl bnQKICAgc291cmNlcyBiZWNhdXNlIHBwb2xsKDIpL2Vwb2xsKDcpIGlzIG5ldmVyIGludm9rZWQu CgpUaGlzIHBhdGNoIHJlbW92ZXMgdGhlIGZvcmNlZCBwb2xsaW5nIGl0ZXJhdGlvbiBzbyB0aGF0 IHBvbGxfbnM9MCByZWFsbHkKbWVhbnMgbm8gcG9sbGluZy4KCklPUFMgaW5jcmVhc2VzIGZyb20g MTBrIHRvIDYwayB3aGVuIHRoZSBndWVzdCBoYXMgMTAwCnZpcnRpby1ibGstcGNpLG51bS1xdWV1 ZXM9MzIgZGV2aWNlcyBhbmQgMSB2aXJ0aW8tYmxrLXBjaSxudW0tcXVldWVzPTEKZGV2aWNlIGJl Y2F1c2UgdGhlIGxhcmdlIG51bWJlciBvZiBldmVudCBzb3VyY2VzIGJlaW5nIHBvbGxlZCBzbG93 cyBkb3duCnRoZSBldmVudCBsb29wLgoKU2lnbmVkLW9mZi1ieTogU3RlZmFuIEhham5vY3ppIDxz dGVmYW5oYUByZWRoYXQuY29tPgotLS0KIHV0aWwvYWlvLXBvc2l4LmMgfCAyMiArKysrKysrKysr KysrKystLS0tLS0tCiAxIGZpbGUgY2hhbmdlZCwgMTUgaW5zZXJ0aW9ucygrKSwgNyBkZWxldGlv bnMoLSkKCmRpZmYgLS1naXQgYS91dGlsL2Fpby1wb3NpeC5jIGIvdXRpbC9haW8tcG9zaXguYwpp bmRleCA5ZTFiZWZjMGMwLi4wMjlmMTQ2NDU1IDEwMDY0NAotLS0gYS91dGlsL2Fpby1wb3NpeC5j CisrKyBiL3V0aWwvYWlvLXBvc2l4LmMKQEAgLTM2MSwxMiArMzYxLDEzIEBAIHZvaWQgYWlvX3Nl dF9ldmVudF9ub3RpZmllcl9wb2xsKEFpb0NvbnRleHQgKmN0eCwKICAgICAgICAgICAgICAgICAg ICAgKElPSGFuZGxlciAqKWlvX3BvbGxfZW5kKTsKIH0KIAotc3RhdGljIHZvaWQgcG9sbF9zZXRf c3RhcnRlZChBaW9Db250ZXh0ICpjdHgsIGJvb2wgc3RhcnRlZCkKK3N0YXRpYyBib29sIHBvbGxf c2V0X3N0YXJ0ZWQoQWlvQ29udGV4dCAqY3R4LCBib29sIHN0YXJ0ZWQpCiB7CiAgICAgQWlvSGFu ZGxlciAqbm9kZTsKKyAgICBib29sIHByb2dyZXNzID0gZmFsc2U7CiAKICAgICBpZiAoc3RhcnRl ZCA9PSBjdHgtPnBvbGxfc3RhcnRlZCkgewotICAgICAgICByZXR1cm47CisgICAgICAgIHJldHVy biBmYWxzZTsKICAgICB9CiAKICAgICBjdHgtPnBvbGxfc3RhcnRlZCA9IHN0YXJ0ZWQ7CkBAIC0z ODgsOCArMzg5LDE1IEBAIHN0YXRpYyB2b2lkIHBvbGxfc2V0X3N0YXJ0ZWQoQWlvQ29udGV4dCAq Y3R4LCBib29sIHN0YXJ0ZWQpCiAgICAgICAgIGlmIChmbikgewogICAgICAgICAgICAgZm4obm9k ZS0+b3BhcXVlKTsKICAgICAgICAgfQorCisgICAgICAgIC8qIFBvbGwgb25lIGxhc3QgdGltZSBp biBjYXNlIC0+aW9fcG9sbF9lbmQoKSByYWNlZCB3aXRoIHRoZSBldmVudCAqLworICAgICAgICBp ZiAoIXN0YXJ0ZWQpIHsKKyAgICAgICAgICAgIHByb2dyZXNzID0gbm9kZS0+aW9fcG9sbChub2Rl LT5vcGFxdWUpIHx8IHByb2dyZXNzOworICAgICAgICB9CiAgICAgfQogICAgIHFlbXVfbG9ja2Nu dF9kZWMoJmN0eC0+bGlzdF9sb2NrKTsKKworICAgIHJldHVybiBwcm9ncmVzczsKIH0KIAogCkBA IC02NzAsMTIgKzY3OCwxMiBAQCBzdGF0aWMgYm9vbCB0cnlfcG9sbF9tb2RlKEFpb0NvbnRleHQg KmN0eCwgaW50NjRfdCAqdGltZW91dCkKICAgICAgICAgfQogICAgIH0KIAotICAgIHBvbGxfc2V0 X3N0YXJ0ZWQoY3R4LCBmYWxzZSk7CisgICAgaWYgKHBvbGxfc2V0X3N0YXJ0ZWQoY3R4LCBmYWxz ZSkpIHsKKyAgICAgICAgKnRpbWVvdXQgPSAwOworICAgICAgICByZXR1cm4gdHJ1ZTsKKyAgICB9 CiAKLSAgICAvKiBFdmVuIGlmIHdlIGRvbid0IHJ1biBidXN5IHBvbGxpbmcsIHRyeSBwb2xsaW5n IG9uY2UgaW4gY2FzZSBpdCBjYW4gbWFrZQotICAgICAqIHByb2dyZXNzIGFuZCB0aGUgY2FsbGVy IHdpbGwgYmUgYWJsZSB0byBhdm9pZCBwcG9sbCgyKS9lcG9sbF93YWl0KDIpLgotICAgICAqLwot ICAgIHJldHVybiBydW5fcG9sbF9oYW5kbGVyc19vbmNlKGN0eCwgdGltZW91dCk7CisgICAgcmV0 dXJuIGZhbHNlOwogfQogCiBib29sIGFpb19wb2xsKEFpb0NvbnRleHQgKmN0eCwgYm9vbCBibG9j a2luZykKLS0gCjIuMjQuMQoK