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bh=N72jo2qy7yIe80Sdmh2qTL3VyO0YOqstTVx8zIjrf2A=; b=ilY0I74FiLdZUinjlhrxPrnsMopBOCM+7obf/Ve66UHZQoTI/0LEMdDk/8mFvmcn/fkbJT dNIWnejljbPYa1Z/cXFMd8kEfP7vlKgxb8H9vtE+Ge8SrMpHHbaiDbjesm7if9V+OCo671 MSgpdk2Gpldf07zPilF/DyCV0KES01M= X-MC-Unique: 1SJPmuKbNTyUJTF8aHPnxQ-1 From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PULL 1/8] tests/fuzz/Makefile: Do not link code using unavailable devices Date: Tue, 19 May 2020 09:00:47 +0100 Message-Id: <20200519080054.146495-2-stefanha@redhat.com> In-Reply-To: <20200519080054.146495-1-stefanha@redhat.com> References: <20200519080054.146495-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.139.110.61; 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charset="utf-8" From: Philippe Mathieu-Daud=C3=A9 Some devices availability depends on CONFIG options. Use these options to only link tests when requested device is available. Signed-off-by: Philippe Mathieu-Daud=C3=A9 Message-id: 20200514143433.18569-2-philmd@redhat.com Signed-off-by: Stefan Hajnoczi --- tests/qtest/fuzz/Makefile.include | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tests/qtest/fuzz/Makefile.include b/tests/qtest/fuzz/Makefile.= include index cde3e9636c..f259d866c9 100644 --- a/tests/qtest/fuzz/Makefile.include +++ b/tests/qtest/fuzz/Makefile.include @@ -7,9 +7,9 @@ fuzz-obj-y +=3D tests/qtest/fuzz/fork_fuzz.o fuzz-obj-y +=3D tests/qtest/fuzz/qos_fuzz.o =20 # Targets -fuzz-obj-y +=3D tests/qtest/fuzz/i440fx_fuzz.o -fuzz-obj-y +=3D tests/qtest/fuzz/virtio_net_fuzz.o -fuzz-obj-y +=3D tests/qtest/fuzz/virtio_scsi_fuzz.o +fuzz-obj-$(CONFIG_PCI_I440FX) +=3D tests/qtest/fuzz/i440fx_fuzz.o +fuzz-obj-$(CONFIG_VIRTIO_NET) +=3D tests/qtest/fuzz/virtio_net_fuzz.o +fuzz-obj-$(CONFIG_SCSI) +=3D tests/qtest/fuzz/virtio_scsi_fuzz.o =20 FUZZ_CFLAGS +=3D -I$(SRC_PATH)/tests -I$(SRC_PATH)/tests/qtest =20 --=20 2.25.3 From nobody Sat Apr 12 07:45:30 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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bh=3kercReWlZ2KhPw8IavTNPyATttTJZan4+XkgSZ5rfc=; b=Ccfm/fHvaCvvBL6FFfss4Q6R/3ReTjUjIMFIXnNMfcOIBWSLOFdmzgE7YZcAiF4FtJEiBP 7Md0/e+Tzrm8CLsLjRUOi0NgAv5+WpGAF03kcync13UFQMaTzbF2CQqJqHimT/UyYBPfIU dJRoDuKBvuC9sDdFuuTil7JPIu1BIGg= X-MC-Unique: n2S0Iw9JPWmmY1FnM3fKww-1 From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PULL 2/8] Makefile: List fuzz targets in 'make help' Date: Tue, 19 May 2020 09:00:48 +0100 Message-Id: <20200519080054.146495-3-stefanha@redhat.com> In-Reply-To: <20200519080054.146495-1-stefanha@redhat.com> References: <20200519080054.146495-1-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-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.139.110.61; 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charset="utf-8" From: Philippe Mathieu-Daud=C3=A9 List softmmu fuzz targets in 'make help' output: $ make help ... Architecture specific targets: aarch64-softmmu/all - Build for aarch64-softmmu aarch64-softmmu/fuzz - Build fuzzer for aarch64-softmmu alpha-softmmu/all - Build for alpha-softmmu alpha-softmmu/fuzz - Build fuzzer for alpha-softmmu arm-softmmu/all - Build for arm-softmmu arm-softmmu/fuzz - Build fuzzer for arm-softmmu ... Signed-off-by: Philippe Mathieu-Daud=C3=A9 Message-id: 20200514143433.18569-3-philmd@redhat.com Signed-off-by: Stefan Hajnoczi --- Makefile | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 34275f57c9..40e4f7677b 100644 --- a/Makefile +++ b/Makefile @@ -1252,7 +1252,11 @@ endif @$(if $(TARGET_DIRS), \ echo 'Architecture specific targets:'; \ $(foreach t, $(TARGET_DIRS), \ - $(call print-help-run,$(t)/all,Build for $(t));) \ + $(call print-help-run,$(t)/all,Build for $(t)); \ + $(if $(CONFIG_FUZZ), \ + $(if $(findstring softmmu,$(t)), \ + $(call print-help-run,$(t)/fuzz,Build fuzzer for $(t)); \ + ))) \ echo '') @$(if $(TOOLS), \ echo 'Tools targets:'; \ --=20 2.25.3 From nobody Sat Apr 12 07:45:30 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" From: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Philippe Mathieu-Daud=C3=A9 Message-id: 20200514143433.18569-4-philmd@redhat.com Signed-off-by: Stefan Hajnoczi --- tests/qtest/fuzz/i440fx_fuzz.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tests/qtest/fuzz/i440fx_fuzz.c b/tests/qtest/fuzz/i440fx_fuzz.c index ab5f112584..96fed9ff12 100644 --- a/tests/qtest/fuzz/i440fx_fuzz.c +++ b/tests/qtest/fuzz/i440fx_fuzz.c @@ -159,7 +159,7 @@ static void register_pci_fuzz_targets(void) /* Uses simple qtest commands and reboots to reset state */ fuzz_add_target(&(FuzzTarget){ .name =3D "i440fx-qtest-reboot-fuzz", - .description =3D "Fuzz the i440fx using raw qtest commands= and" + .description =3D "Fuzz the i440fx using raw qtest commands= and " "rebooting after each run", .get_init_cmdline =3D i440fx_argv, .fuzz =3D i440fx_fuzz_qtest}); @@ -167,7 +167,7 @@ static void register_pci_fuzz_targets(void) /* Uses libqos and forks to prevent state leakage */ fuzz_add_qos_target(&(FuzzTarget){ .name =3D "i440fx-qos-fork-fuzz", - .description =3D "Fuzz the i440fx using raw qtest commands= and" + .description =3D "Fuzz the i440fx using raw qtest commands= and " "rebooting after each run", .pre_vm_init =3D &fork_init, .fuzz =3D i440fx_fuzz_qos_fork,}, @@ -182,7 +182,7 @@ static void register_pci_fuzz_targets(void) */ fuzz_add_qos_target(&(FuzzTarget){ .name =3D "i440fx-qos-noreset-fuzz", - .description =3D "Fuzz the i440fx using raw qtest commands= and" + .description =3D "Fuzz the i440fx using raw qtest commands= and " "rebooting after each run", .fuzz =3D i440fx_fuzz_qos,}, "i440FX-pcihost", --=20 2.25.3 From nobody Sat Apr 12 07:45:30 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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charset="utf-8" From: Philippe Mathieu-Daud=C3=A9 These typedefs are not used. Use a simple structure, remote the typedefs. Signed-off-by: Philippe Mathieu-Daud=C3=A9 Message-id: 20200514143433.18569-5-philmd@redhat.com Signed-off-by: Stefan Hajnoczi --- tests/qtest/fuzz/i440fx_fuzz.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/tests/qtest/fuzz/i440fx_fuzz.c b/tests/qtest/fuzz/i440fx_fuzz.c index 96fed9ff12..c197b026db 100644 --- a/tests/qtest/fuzz/i440fx_fuzz.c +++ b/tests/qtest/fuzz/i440fx_fuzz.c @@ -45,12 +45,11 @@ static void i440fx_fuzz_qtest(QTestState *s, * loop over the Data, breaking it up into actions. each action has an * opcode, address offset and value */ - typedef struct QTestFuzzAction { + struct { uint8_t opcode; uint8_t addr; uint32_t value; - } QTestFuzzAction; - QTestFuzzAction a; + } a; =20 while (Size >=3D sizeof(a)) { /* make a copy of the action so we can normalize the values in-pla= ce */ @@ -91,19 +90,18 @@ static void i440fx_fuzz_qos(QTestState *s, * Same as i440fx_fuzz_qtest, but using QOS. devfn is incorporated int= o the * value written over Port IO */ - typedef struct QOSFuzzAction { + struct { uint8_t opcode; 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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1589875303; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6+29Q88WMP6bnu7l14pY5RPMQUIG9etzOO7rYlk3+i0=; b=Ycf3RDx9DUitke2cT7MHjVAAkCSSyZeKgSTgvF/huODHnbinX+36l1WfjSVEXWfKlp65N2 nIP49LxVrCLjhKVd+ZlohSJ3FbjNaluAhsoiGo81OmBLi+s/Mez61RxhBme0PgycrW3KvX LkNnvIaQ5Gezdv/TsxmxrZhuC72aoII= X-MC-Unique: DBaj6I-YO3q9wo1WgCihpQ-1 From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PULL 5/8] tests/fuzz: Extract pciconfig_fuzz_qos() method Date: Tue, 19 May 2020 09:00:51 +0100 Message-Id: <20200519080054.146495-6-stefanha@redhat.com> In-Reply-To: <20200519080054.146495-1-stefanha@redhat.com> References: <20200519080054.146495-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" From: Philippe Mathieu-Daud=C3=A9 Extract the generic pciconfig_fuzz_qos() method from i440fx_fuzz_qos(). This will help to write tests not specific to the i440FX controller. Signed-off-by: Philippe Mathieu-Daud=C3=A9 Message-id: 20200514143433.18569-6-philmd@redhat.com Signed-off-by: Stefan Hajnoczi --- tests/qtest/fuzz/i440fx_fuzz.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/tests/qtest/fuzz/i440fx_fuzz.c b/tests/qtest/fuzz/i440fx_fuzz.c index c197b026db..558fa17c93 100644 --- a/tests/qtest/fuzz/i440fx_fuzz.c +++ b/tests/qtest/fuzz/i440fx_fuzz.c @@ -84,7 +84,7 @@ static void i440fx_fuzz_qtest(QTestState *s, flush_events(s); } =20 -static void i440fx_fuzz_qos(QTestState *s, +static void pciconfig_fuzz_qos(QTestState *s, QPCIBus *bus, const unsigned char *Data, size_t Size) { /* * Same as i440fx_fuzz_qtest, but using QOS. devfn is incorporated int= o the @@ -97,11 +97,6 @@ static void i440fx_fuzz_qos(QTestState *s, uint32_t value; } a; =20 - static QPCIBus *bus; - if (!bus) { - bus =3D qpci_new_pc(s, fuzz_qos_alloc); - } - while (Size >=3D sizeof(a)) { memcpy(&a, Data, sizeof(a)); switch (a.opcode % ACTION_MAX) { @@ -130,6 +125,19 @@ static void i440fx_fuzz_qos(QTestState *s, flush_events(s); } =20 +static void i440fx_fuzz_qos(QTestState *s, + const unsigned char *Data, + size_t Size) +{ + static QPCIBus *bus; + + if (!bus) { + bus =3D qpci_new_pc(s, fuzz_qos_alloc); + } + + pciconfig_fuzz_qos(s, bus, Data, Size); +} + static void i440fx_fuzz_qos_fork(QTestState *s, const unsigned char *Data, size_t Size) { if (fork() =3D=3D 0) { --=20 2.25.3 From nobody Sat Apr 12 07:45:30 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1589875720; cv=none; d=zohomail.com; s=zohoarc; b=i/izOjMaGa45NYDCBxxxKAf/Ib+FXJtchPjCjA6S089Jho5sujD6KJJcbjxzJMS7ak+dgAzfUYmyOuT+9X7a7zW2N7DeLtdI8VGbAr/OUIvVXKbA6E2D4btksi32H/wvmPZMAlMvM/wWRI18zGvr8APAhZhUzZ8DpRd3Sa9FKmw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; 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charset="utf-8" From: Philippe Mathieu-Daud=C3=A9 Extract generic ioport_fuzz_qtest() method from i440fx_fuzz_qtest(). This will help to write tests not specific to the i440FX controller. Signed-off-by: Philippe Mathieu-Daud=C3=A9 Message-id: 20200514143433.18569-7-philmd@redhat.com Signed-off-by: Stefan Hajnoczi --- tests/qtest/fuzz/i440fx_fuzz.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/tests/qtest/fuzz/i440fx_fuzz.c b/tests/qtest/fuzz/i440fx_fuzz.c index 558fa17c93..bcd6769b4c 100644 --- a/tests/qtest/fuzz/i440fx_fuzz.c +++ b/tests/qtest/fuzz/i440fx_fuzz.c @@ -39,7 +39,7 @@ enum action_id { ACTION_MAX }; =20 -static void i440fx_fuzz_qtest(QTestState *s, +static void ioport_fuzz_qtest(QTestState *s, const unsigned char *Data, size_t Size) { /* * loop over the Data, breaking it up into actions. each action has an @@ -84,10 +84,17 @@ static void i440fx_fuzz_qtest(QTestState *s, flush_events(s); } =20 +static void i440fx_fuzz_qtest(QTestState *s, + const unsigned char *Data, + size_t Size) +{ + ioport_fuzz_qtest(s, Data, Size); +} + static void pciconfig_fuzz_qos(QTestState *s, QPCIBus *bus, const unsigned char *Data, size_t Size) { /* - * Same as i440fx_fuzz_qtest, but using QOS. devfn is incorporated int= o the + * Same as ioport_fuzz_qtest, but using QOS. devfn is incorporated int= o the * value written over Port IO */ struct { --=20 2.25.3 From nobody Sat Apr 12 07:45:30 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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Tue, 19 May 2020 04:02:03 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-322-fe2EQ68gMEqbGoCrk9eriw-1; Tue, 19 May 2020 04:01:58 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 43502107ACCA; Tue, 19 May 2020 08:01:57 +0000 (UTC) Received: from localhost (ovpn-114-215.ams2.redhat.com [10.36.114.215]) by smtp.corp.redhat.com (Postfix) with ESMTP id 18B7A79581; Tue, 19 May 2020 08:01:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1589875322; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=wZQYqyJDDytFdKeDX7BQ9v3ONr1NxDeFstGIXsm97BM=; b=i2MYAbuLrCCXzvTzQMpD1d0HYblXV67E0NVATMsKalmFaodg7RY8jO9Nf7L7TOPsSvle3c 2Cj0NCokiKt+p65ScwtFQpiRtWNWxL2lPs8/jj/PeL2HRpd/sXEw8Bd7CCrkeRgoLTAtj3 hlqo4w9As02XvVY0eXSdh6vtGwYZR5I= X-MC-Unique: fe2EQ68gMEqbGoCrk9eriw-1 From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PULL 7/8] aio-posix: don't duplicate fd handler deletion in fdmon_io_uring_destroy() Date: Tue, 19 May 2020 09:00:53 +0100 Message-Id: <20200519080054.146495-8-stefanha@redhat.com> In-Reply-To: <20200519080054.146495-1-stefanha@redhat.com> References: <20200519080054.146495-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.139.110.61; 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charset="utf-8" The io_uring file descriptor monitoring implementation has an internal list of fd handlers that are pending submission to io_uring. fdmon_io_uring_destroy() deletes all fd handlers on the list. Don't delete fd handlers directly in fdmon_io_uring_destroy() for two reasons: 1. This duplicates the aio-posix.c AioHandler deletion code and could become outdated if the struct changes. 2. Only handlers with the FDMON_IO_URING_REMOVE flag set are safe to remove. If the flag is not set then something still has a pointer to the fd handler. Let aio-posix.c and its user worry about that. In practice this isn't an issue because fdmon_io_uring_destroy() is only called when shutting down so all users have removed their fd handlers, but the next patch will need this! Signed-off-by: Stefan Hajnoczi Tested-by: Oleksandr Natalenko Message-id: 20200511183630.279750-2-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi --- util/aio-posix.c | 1 + util/fdmon-io_uring.c | 13 ++++++++++--- 2 files changed, 11 insertions(+), 3 deletions(-) diff --git a/util/aio-posix.c b/util/aio-posix.c index c3613d299e..8af334ab19 100644 --- a/util/aio-posix.c +++ b/util/aio-posix.c @@ -679,6 +679,7 @@ void aio_context_destroy(AioContext *ctx) { fdmon_io_uring_destroy(ctx); fdmon_epoll_disable(ctx); + aio_free_deleted_handlers(ctx); } =20 void aio_context_set_poll_params(AioContext *ctx, int64_t max_ns, diff --git a/util/fdmon-io_uring.c b/util/fdmon-io_uring.c index d5a80ed6fb..1d14177df0 100644 --- a/util/fdmon-io_uring.c +++ b/util/fdmon-io_uring.c @@ -342,11 +342,18 @@ void fdmon_io_uring_destroy(AioContext *ctx) =20 io_uring_queue_exit(&ctx->fdmon_io_uring); =20 - /* No need to submit these anymore, just free them. */ + /* Move handlers due to be removed onto the deleted list */ while ((node =3D QSLIST_FIRST_RCU(&ctx->submit_list))) { + unsigned flags =3D atomic_fetch_and(&node->flags, + ~(FDMON_IO_URING_PENDING | + FDMON_IO_URING_ADD | + FDMON_IO_URING_REMOVE)); + + if (flags & FDMON_IO_URING_REMOVE) { + QLIST_INSERT_HEAD_RCU(&ctx->deleted_aio_handlers, node, no= de_deleted); + } + QSLIST_REMOVE_HEAD_RCU(&ctx->submit_list, node_submitted); - QLIST_REMOVE(node, node); - g_free(node); } =20 ctx->fdmon_ops =3D &fdmon_poll_ops; --=20 2.25.3 From nobody Sat Apr 12 07:45:30 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1589875853; cv=none; d=zohomail.com; s=zohoarc; b=JxrAjiWOW6frupGSEMQwoZeS6h5mFTj1Ff+fqvdIRjsLsP6zxq73TfNFCT+g4zw7blaGGYD1W1fr7CZD8h5bjMxLyQn+gC6/Z9y2dFQawFOxR+GzzpIBDemrG9qHSEG/BPgICDv7B0EywZVvuE+9hksfBtq9gvh5fZn4K2lz1Kw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1589875853; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1589875334; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=9bcHYPqsq6MA39QLNH+1X3Y7lyoM7eyT2Vqm5pRGwqM=; b=Q/E7ixHB3cOgkNPCJYhKFpMzNMARX71uy8nprPbpuE/X3YCLPermqQPlD3daLLy0z4gi5m u/vZX4YQL8dk51MOAWC2I+Xl3ccnW3TDbmMvFEZCc/ZTaf6azouHmKFa1CkzeQMxWKl3In z/tgfxLVr6Rw/hj3PNuBtyi4BKRKceA= X-MC-Unique: rr1VLbUWO6mixA8Ouk8JVA-1 From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PULL 8/8] aio-posix: disable fdmon-io_uring when GSource is used Date: Tue, 19 May 2020 09:00:54 +0100 Message-Id: <20200519080054.146495-9-stefanha@redhat.com> In-Reply-To: <20200519080054.146495-1-stefanha@redhat.com> References: <20200519080054.146495-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=207.211.31.120; envelope-from=stefanha@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/19 00:34:39 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -3 X-Spam_score: -0.4 X-Spam_bar: / X-Spam_report: (-0.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MIME_BASE64_TEXT=1.741, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action 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: Laurent Vivier , Peter Maydell , Thomas Huth , qemu-block@nongnu.org, Oleksandr Natalenko , Stefan Weil , Max Reitz , Alexander Bulekov , Bandan Das , Stefan Hajnoczi , Paolo Bonzini , Fam Zheng , Kevin Wolf Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" The glib event loop does not call fdmon_io_uring_wait() so fd handlers waiting to be submitted build up in the list. There is no benefit is using io_uring when the glib GSource is being used, so disable it instead of implementing a more complex fix. This fixes a memory leak where AioHandlers would build up and increasing amounts of CPU time were spent iterating them in aio_pending(). The symptom is that guests become slow when QEMU is built with io_uring support. Buglink: https://bugs.launchpad.net/qemu/+bug/1877716 Fixes: 73fd282e7b6dd4e4ea1c3bbb3d302c8db51e4ccf ("aio-posix: add io_uring f= d monitoring implementation") Signed-off-by: Stefan Hajnoczi Tested-by: Oleksandr Natalenko Message-id: 20200511183630.279750-3-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi --- include/block/aio.h | 3 +++ util/aio-posix.c | 12 ++++++++++++ util/aio-win32.c | 4 ++++ util/async.c | 1 + 4 files changed, 20 insertions(+) diff --git a/include/block/aio.h b/include/block/aio.h index 62ed954344..b2f703fa3f 100644 --- a/include/block/aio.h +++ b/include/block/aio.h @@ -701,6 +701,9 @@ void aio_context_setup(AioContext *ctx); */ void aio_context_destroy(AioContext *ctx); =20 +/* Used internally, do not call outside AioContext code */ +void aio_context_use_g_source(AioContext *ctx); + /** * aio_context_set_poll_params: * @ctx: the aio context diff --git a/util/aio-posix.c b/util/aio-posix.c index 8af334ab19..1b2a3af65b 100644 --- a/util/aio-posix.c +++ b/util/aio-posix.c @@ -682,6 +682,18 @@ void aio_context_destroy(AioContext *ctx) aio_free_deleted_handlers(ctx); } =20 +void aio_context_use_g_source(AioContext *ctx) +{ + /* + * Disable io_uring when the glib main loop is used because it doesn't + * support mixed glib/aio_poll() usage. It relies on aio_poll() being + * called regularly so that changes to the monitored file descriptors = are + * submitted, otherwise a list of pending fd handlers builds up. + */ + fdmon_io_uring_destroy(ctx); + aio_free_deleted_handlers(ctx); +} + void aio_context_set_poll_params(AioContext *ctx, int64_t max_ns, int64_t grow, int64_t shrink, Error **err= p) { diff --git a/util/aio-win32.c b/util/aio-win32.c index 729d533faf..953c56ab48 100644 --- a/util/aio-win32.c +++ b/util/aio-win32.c @@ -414,6 +414,10 @@ void aio_context_destroy(AioContext *ctx) { } =20 +void aio_context_use_g_source(AioContext *ctx) +{ +} + void aio_context_set_poll_params(AioContext *ctx, int64_t max_ns, int64_t grow, int64_t shrink, Error **err= p) { diff --git a/util/async.c b/util/async.c index 3165a28f2f..1319eee3bc 100644 --- a/util/async.c +++ b/util/async.c @@ -362,6 +362,7 @@ static GSourceFuncs aio_source_funcs =3D { =20 GSource *aio_get_g_source(AioContext *ctx) { + aio_context_use_g_source(ctx); g_source_ref(&ctx->source); return &ctx->source; } --=20 2.25.3