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Re: [Qemu-devel] [PATCH 02/11] coroutine-lock: add qemu_co_rwlock_downgr
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-devel] [PATCH 02/11] coroutine-lock: add qemu_co_rwlock_downgrade and qemu_co_rwlock_upgrade |
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Date: |
Wed, 31 May 2017 15:50:04 -0500 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.0 |
On 05/31/2017 04:43 AM, Paolo Bonzini wrote:
> These functions are more efficient in the presence of contention.
> qemu_co_rwlock_downgrade also guarantees not to block, which may
> be useful in some algorithms too.
>
> Signed-off-by: Paolo Bonzini <address@hidden>
> ---
> include/qemu/coroutine.h | 19 +++++++++++++++++++
> util/qemu-coroutine-lock.c | 35 +++++++++++++++++++++++++++++++++++
> 2 files changed, 54 insertions(+)
>
Reviewed-by: Eric Blake <address@hidden>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
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- [Qemu-devel] [RFC PATCH 00/11] Block layer thread-safety, part 2, Paolo Bonzini, 2017/05/31
- [Qemu-devel] [PATCH 05/11] vvfat: make it thread-safe, Paolo Bonzini, 2017/05/31
- [Qemu-devel] [PATCH 01/11] qcow2: call CoQueue APIs under CoMutex, Paolo Bonzini, 2017/05/31
- [Qemu-devel] [PATCH 02/11] coroutine-lock: add qemu_co_rwlock_downgrade and qemu_co_rwlock_upgrade, Paolo Bonzini, 2017/05/31
- Re: [Qemu-devel] [PATCH 02/11] coroutine-lock: add qemu_co_rwlock_downgrade and qemu_co_rwlock_upgrade,
Eric Blake <=
- [Qemu-devel] [PATCH 03/11] vdi: make it thread-safe, Paolo Bonzini, 2017/05/31
- [Qemu-devel] [PATCH 04/11] vpc: make it thread-safe, Paolo Bonzini, 2017/05/31
- [Qemu-devel] [PATCH 06/11] nbd: make it thread-safe, Paolo Bonzini, 2017/05/31
- [Qemu-devel] [PATCH 07/11] qed: move tail of qed_aio_write_main to qed_aio_write_{cow, alloc}, Paolo Bonzini, 2017/05/31
- [Qemu-devel] [PATCH 08/11] block: invoke .bdrv_drain callback in coroutine context and from AioContext, Paolo Bonzini, 2017/05/31
- [Qemu-devel] [PATCH 11/11] ssh: support I/O from any AioContext, Paolo Bonzini, 2017/05/31
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