Re: [PATCH 00/12] Removal of Aiocontext lock through drains: protect bdr

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Re: [PATCH 00/12] Removal of Aiocontext lock through drains: protect bdr

From:	Paolo Bonzini
Subject:	Re: [PATCH 00/12] Removal of Aiocontext lock through drains: protect bdrv_replace_child_noperm.
Date:	Thu, 27 Jan 2022 14:46:13 +0100
User-agent:	Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.4.0

On 1/26/22 12:29, Stefan Hajnoczi wrote:

Still, I'm a bit surprised I didn't notice any
aio_context_acquire/release() removals in this patch series because I
thought callers need that before they switch to
BDRV_POLL_WHILE_UNLOCKED()?

I think the callers are new and were not callingbdrv_subtree_drained_begin() (and thus BDRV_POLL_WHILE) at all?


Emanuele, enlighten us. :)

Paolo

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Re: [PATCH 08/12] reopen: add a transaction to drain_end nodes picked in bdrv_reopen_parse_file_or_backing, (continued)
- [PATCH 04/12] block.c: bdrv_replace_child_noperm: first call ->attach(), and then add child, Emanuele Giuseppe Esposito, 2022/01/18
- [PATCH 02/12] block/io.c: make bdrv_do_drained_begin_quiesce static and introduce bdrv_drained_begin_no_poll, Emanuele Giuseppe Esposito, 2022/01/18
  - Re: [PATCH 02/12] block/io.c: make bdrv_do_drained_begin_quiesce static and introduce bdrv_drained_begin_no_poll, Paolo Bonzini, 2022/01/19
- [PATCH 07/12] block/io.c: introduce bdrv_subtree_drained_{begin/end}_unlocked, Emanuele Giuseppe Esposito, 2022/01/18
  - Re: [PATCH 07/12] block/io.c: introduce bdrv_subtree_drained_{begin/end}_unlocked, Paolo Bonzini, 2022/01/19
  - Re: [PATCH 07/12] block/io.c: introduce bdrv_subtree_drained_{begin/end}_unlocked, Stefan Hajnoczi, 2022/01/26
- [PATCH 11/12] block/io.c: fully enable assert_bdrv_graph_writable, Emanuele Giuseppe Esposito, 2022/01/18
- Re: [PATCH 00/12] Removal of Aiocontext lock through drains: protect bdrv_replace_child_noperm., Paolo Bonzini, 2022/01/19
- Re: [PATCH 00/12] Removal of Aiocontext lock through drains: protect bdrv_replace_child_noperm., Stefan Hajnoczi, 2022/01/26
  - Re: [PATCH 00/12] Removal of Aiocontext lock through drains: protect bdrv_replace_child_noperm., Paolo Bonzini <=
    - Re: [PATCH 00/12] Removal of Aiocontext lock through drains: protect bdrv_replace_child_noperm., Emanuele Giuseppe Esposito, 2022/01/28

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