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Wed, 11 Mar 2020 12:41:04 +0000 (UTC) Received: from localhost (unknown [10.36.118.127]) by smtp.corp.redhat.com (Postfix) with ESMTP id 648C338E; Wed, 11 Mar 2020 12:41:01 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PULL 3/9] aio-posix: completely stop polling when disabled Date: Wed, 11 Mar 2020 12:40:39 +0000 Message-Id: <20200311124045.277969-4-stefanha@redhat.com> In-Reply-To: <20200311124045.277969-1-stefanha@redhat.com> References: <20200311124045.277969-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 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: 207.211.31.120 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 , Peter Maydell , qemu-block@nongnu.org, Max Reitz , Stefan Hajnoczi , Paolo Bonzini , Kevin Wolf 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 dGVmYW5oYUByZWRoYXQuY29tPgpMaW5rOiBodHRwczovL2xvcmUua2VybmVsLm9yZy9yLzIwMjAw MzA1MTcwODA2LjEzMTMyNDUtMi1zdGVmYW5oYUByZWRoYXQuY29tCk1lc3NhZ2UtSWQ6IDwyMDIw MDMwNTE3MDgwNi4xMzEzMjQ1LTItc3RlZmFuaGFAcmVkaGF0LmNvbT4KLS0tCiB1dGlsL2Fpby1w b3NpeC5jIHwgMjIgKysrKysrKysrKysrKysrLS0tLS0tLQogMSBmaWxlIGNoYW5nZWQsIDE1IGlu c2VydGlvbnMoKyksIDcgZGVsZXRpb25zKC0pCgpkaWZmIC0tZ2l0IGEvdXRpbC9haW8tcG9zaXgu YyBiL3V0aWwvYWlvLXBvc2l4LmMKaW5kZXggYjMzOWFhYjEyYy4uNjU5NjRhMjU5NyAxMDA2NDQK LS0tIGEvdXRpbC9haW8tcG9zaXguYworKysgYi91dGlsL2Fpby1wb3NpeC5jCkBAIC0zNjEsMTIg KzM2MSwxMyBAQCB2b2lkIGFpb19zZXRfZXZlbnRfbm90aWZpZXJfcG9sbChBaW9Db250ZXh0ICpj dHgsCiAgICAgICAgICAgICAgICAgICAgIChJT0hhbmRsZXIgKilpb19wb2xsX2VuZCk7CiB9CiAK LXN0YXRpYyB2b2lkIHBvbGxfc2V0X3N0YXJ0ZWQoQWlvQ29udGV4dCAqY3R4LCBib29sIHN0YXJ0 ZWQpCitzdGF0aWMgYm9vbCBwb2xsX3NldF9zdGFydGVkKEFpb0NvbnRleHQgKmN0eCwgYm9vbCBz dGFydGVkKQogewogICAgIEFpb0hhbmRsZXIgKm5vZGU7CisgICAgYm9vbCBwcm9ncmVzcyA9IGZh bHNlOwogCiAgICAgaWYgKHN0YXJ0ZWQgPT0gY3R4LT5wb2xsX3N0YXJ0ZWQpIHsKLSAgICAgICAg cmV0dXJuOworICAgICAgICByZXR1cm4gZmFsc2U7CiAgICAgfQogCiAgICAgY3R4LT5wb2xsX3N0 YXJ0ZWQgPSBzdGFydGVkOwpAQCAtMzg4LDggKzM4OSwxNSBAQCBzdGF0aWMgdm9pZCBwb2xsX3Nl dF9zdGFydGVkKEFpb0NvbnRleHQgKmN0eCwgYm9vbCBzdGFydGVkKQogICAgICAgICBpZiAoZm4p IHsKICAgICAgICAgICAgIGZuKG5vZGUtPm9wYXF1ZSk7CiAgICAgICAgIH0KKworICAgICAgICAv KiBQb2xsIG9uZSBsYXN0IHRpbWUgaW4gY2FzZSAtPmlvX3BvbGxfZW5kKCkgcmFjZWQgd2l0aCB0 aGUgZXZlbnQgKi8KKyAgICAgICAgaWYgKCFzdGFydGVkKSB7CisgICAgICAgICAgICBwcm9ncmVz cyA9IG5vZGUtPmlvX3BvbGwobm9kZS0+b3BhcXVlKSB8fCBwcm9ncmVzczsKKyAgICAgICAgfQog ICAgIH0KICAgICBxZW11X2xvY2tjbnRfZGVjKCZjdHgtPmxpc3RfbG9jayk7CisKKyAgICByZXR1 cm4gcHJvZ3Jlc3M7CiB9CiAKIApAQCAtNjcwLDEyICs2NzgsMTIgQEAgc3RhdGljIGJvb2wgdHJ5 X3BvbGxfbW9kZShBaW9Db250ZXh0ICpjdHgsIGludDY0X3QgKnRpbWVvdXQpCiAgICAgICAgIH0K ICAgICB9CiAKLSAgICBwb2xsX3NldF9zdGFydGVkKGN0eCwgZmFsc2UpOworICAgIGlmIChwb2xs X3NldF9zdGFydGVkKGN0eCwgZmFsc2UpKSB7CisgICAgICAgICp0aW1lb3V0ID0gMDsKKyAgICAg ICAgcmV0dXJuIHRydWU7CisgICAgfQogCi0gICAgLyogRXZlbiBpZiB3ZSBkb24ndCBydW4gYnVz eSBwb2xsaW5nLCB0cnkgcG9sbGluZyBvbmNlIGluIGNhc2UgaXQgY2FuIG1ha2UKLSAgICAgKiBw cm9ncmVzcyBhbmQgdGhlIGNhbGxlciB3aWxsIGJlIGFibGUgdG8gYXZvaWQgcHBvbGwoMikvZXBv bGxfd2FpdCgyKS4KLSAgICAgKi8KLSAgICByZXR1cm4gcnVuX3BvbGxfaGFuZGxlcnNfb25jZShj dHgsIHRpbWVvdXQpOworICAgIHJldHVybiBmYWxzZTsKIH0KIAogYm9vbCBhaW9fcG9sbChBaW9D b250ZXh0ICpjdHgsIGJvb2wgYmxvY2tpbmcpCi0tIAoyLjI0LjEKCg==