dd7aef2877
- kvm-block-nbd-Fix-hang-in-.bdrv_close.patch [bz#1640894] - kvm-block-Generic-file-creation-fallback.patch [bz#1640894] - kvm-file-posix-Drop-hdev_co_create_opts.patch [bz#1640894] - kvm-iscsi-Drop-iscsi_co_create_opts.patch [bz#1640894] - kvm-iotests-Add-test-for-image-creation-fallback.patch [bz#1640894] - kvm-block-Fix-leak-in-bdrv_create_file_fallback.patch [bz#1640894] - kvm-iotests-Use-complete_and_wait-in-155.patch [bz#1790482 bz#1805143] - kvm-block-Introduce-bdrv_reopen_commit_post-step.patch [bz#1790482 bz#1805143] - kvm-block-qcow2-Move-bitmap-reopen-into-bdrv_reopen_comm.patch [bz#1790482 bz#1805143] - kvm-iotests-Refactor-blockdev-reopen-test-for-iothreads.patch [bz#1790482 bz#1805143] - kvm-block-bdrv_reopen-with-backing-file-in-different-Aio.patch [bz#1790482 bz#1805143] - kvm-block-Versioned-x-blockdev-reopen-API-with-feature-f.patch [bz#1790482 bz#1805143] - kvm-block-Make-bdrv_get_cumulative_perm-public.patch [bz#1790482 bz#1805143] - kvm-block-Relax-restrictions-for-blockdev-snapshot.patch [bz#1790482 bz#1805143] - kvm-iotests-Fix-run_job-with-use_log-False.patch [bz#1790482 bz#1805143] - kvm-iotests-Test-mirror-with-temporarily-disabled-target.patch [bz#1790482 bz#1805143] - kvm-block-Fix-cross-AioContext-blockdev-snapshot.patch [bz#1790482 bz#1805143] - kvm-iotests-Add-iothread-cases-to-155.patch [bz#1790482 bz#1805143] - kvm-qapi-Add-allow-write-only-overlay-feature-for-blockd.patch [bz#1790482 bz#1805143] - kvm-exec-rom_reset-Free-rom-data-during-inmigrate-skip.patch [bz#1809380] - Resolves: bz#1640894 (Fix generic file creation fallback for qemu-img nvme:// image creation support) - Resolves: bz#1790482 (bitmaps in backing images can't be modified) - Resolves: bz#1805143 (allow late/lazy opening of backing chain for shallow blockdev-mirror) - Resolves: bz#1809380 (guest hang during reboot process after migration from RHEl7.8 to RHEL8.2.0.)
79 lines
2.6 KiB
Diff
79 lines
2.6 KiB
Diff
From 4ef2c464a54b0b618d933641ac0a7012e629fed9 Mon Sep 17 00:00:00 2001
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From: Maxim Levitsky <mlevitsk@redhat.com>
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Date: Wed, 11 Mar 2020 10:51:42 +0000
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Subject: [PATCH 01/20] block/nbd: Fix hang in .bdrv_close()
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RH-Author: Maxim Levitsky <mlevitsk@redhat.com>
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Message-id: <20200311105147.13208-2-mlevitsk@redhat.com>
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Patchwork-id: 94224
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O-Subject: [RHEL-AV-8.2.0 qemu-kvm PATCH v2 1/6] block/nbd: Fix hang in .bdrv_close()
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Bugzilla: 1640894
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RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
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RH-Acked-by: John Snow <jsnow@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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From: Max Reitz <mreitz@redhat.com>
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When nbd_close() is called from a coroutine, the connection_co never
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gets to run, and thus nbd_teardown_connection() hangs.
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This is because aio_co_enter() only puts the connection_co into the main
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coroutine's wake-up queue, so this main coroutine needs to yield and
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wait for connection_co to terminate.
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Suggested-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Message-Id: <20200122164532.178040-2-mreitz@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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(cherry picked from commit 78c81a3f108870d325b0a39d88711366afe6f703)
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Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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block/nbd.c | 14 +++++++++++++-
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1 file changed, 13 insertions(+), 1 deletion(-)
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diff --git a/block/nbd.c b/block/nbd.c
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index 5f18f78..a73f0d9 100644
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--- a/block/nbd.c
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+++ b/block/nbd.c
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@@ -70,6 +70,7 @@ typedef struct BDRVNBDState {
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CoMutex send_mutex;
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CoQueue free_sema;
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Coroutine *connection_co;
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+ Coroutine *teardown_co;
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QemuCoSleepState *connection_co_sleep_ns_state;
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bool drained;
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bool wait_drained_end;
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@@ -203,7 +204,15 @@ static void nbd_teardown_connection(BlockDriverState *bs)
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qemu_co_sleep_wake(s->connection_co_sleep_ns_state);
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}
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}
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- BDRV_POLL_WHILE(bs, s->connection_co);
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+ if (qemu_in_coroutine()) {
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+ s->teardown_co = qemu_coroutine_self();
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+ /* connection_co resumes us when it terminates */
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+ qemu_coroutine_yield();
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+ s->teardown_co = NULL;
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+ } else {
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+ BDRV_POLL_WHILE(bs, s->connection_co);
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+ }
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+ assert(!s->connection_co);
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}
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static bool nbd_client_connecting(BDRVNBDState *s)
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@@ -395,6 +404,9 @@ static coroutine_fn void nbd_connection_entry(void *opaque)
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s->ioc = NULL;
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}
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+ if (s->teardown_co) {
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+ aio_co_wake(s->teardown_co);
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+ }
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aio_wait_kick();
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}
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--
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1.8.3.1
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