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[PATCH v2 0/7] block-copy: protect block-copy internal structures
From: |
Emanuele Giuseppe Esposito |
Subject: |
[PATCH v2 0/7] block-copy: protect block-copy internal structures |
Date: |
Tue, 18 May 2021 12:07:50 +0200 |
This serie of patches aims to reduce the usage of the global
AioContexlock in block-copy, by introducing smaller granularity
locks thus on making the block layer thread safe.
This serie depends on Paolo's coroutine_sleep API and my previous
serie that brings thread safety to the smaller API used by block-copy,
like ratelimit, progressmeter abd co-shared-resource.
What's missing for block-copy to be fully thread-safe is fixing
the CoSleep API to allow cross-thread sleep and wakeup.
Paolo is working on it and will post the patches once his new
CoSleep API is accepted.
Patch 1 introduces the .method field instead of .use_copy_range
and .copy_size, so that it can be later used as atomic.
Patch 2-3 provide comments and refactoring in preparation to
the locks added in patch 4 on BlockCopyTask, patch 5-6 on
BlockCopyCallState and 7 BlockCopyState.
Based-on: <20210517100548.28806-1-pbonzini@redhat.com>
Based-on: <20210518094058.25952-1-eesposit@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
v1 -> v2:
* More field categorized as IN/State/OUT in the various struct, better
documentation in the structs
* Fix a couple of places where I missed locks [Vladimir, Paolo]
Emanuele Giuseppe Esposito (6):
block-copy: improve documentation of BlockCopyTask and BlockCopyState
types and functions
block-copy: move progress_set_remaining in block_copy_task_end
block-copy: add a CoMutex to the BlockCopyTask list
block-copy: add QemuMutex lock for BlockCopyCallState list
block-copy: atomic .cancelled and .finished fields in
BlockCopyCallState
block-copy: protect BlockCopyState .method fields
Paolo Bonzini (1):
block-copy: streamline choice of copy_range vs. read/write
block/block-copy.c | 234 +++++++++++++++++++++++++++++----------------
1 file changed, 150 insertions(+), 84 deletions(-)
--
2.30.2
- [PATCH v2 0/7] block-copy: protect block-copy internal structures,
Emanuele Giuseppe Esposito <=
Re: [PATCH v2 1/7] block-copy: streamline choice of copy_range vs. read/write, Stefan Hajnoczi, 2021/05/27