https://github.com/torvalds/linux
Revision a982eeb09b6030e567b8b815277c8c9197168040 authored by Jackie Liu on 14 August 2019, 09:35:22 UTC, committed by Jens Axboe on 15 August 2019, 17:21:39 UTC
This patch may fix two issues:
First, when IOSQE_IO_DRAIN set, the next IOs need to be inserted into
defer list to delay execution, but link io will be actively scheduled to
run by calling io_queue_sqe.
Second, when multiple LINK_IOs are inserted together with defer_list,
the LINK_IO is no longer keep order.
|-------------|
| LINK_IO | ----> insert to defer_list -----------
|-------------| |
| LINK_IO | ----> insert to defer_list ----------|
|-------------| |
| LINK_IO | ----> insert to defer_list ----------|
|-------------| |
| NORMAL_IO | ----> insert to defer_list ----------|
|-------------| |
|
queue_work at same time <-----|
Fixes: 9e645e1105c ("io_uring: add support for sqe links")
Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 parent 7b6620d
Tip revision: a982eeb09b6030e567b8b815277c8c9197168040 authored by Jackie Liu on 14 August 2019, 09:35:22 UTC
io_uring: fix an issue when IOSQE_IO_LINK is inserted into defer list
io_uring: fix an issue when IOSQE_IO_LINK is inserted into defer list
Tip revision: a982eeb
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| .clang-format | -rw-r--r-- | 14.6 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 71 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
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| COPYING | -rw-r--r-- | 423 bytes |
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| Kconfig | -rw-r--r-- | 595 bytes |
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| Makefile | -rw-r--r-- | 59.2 KB |
| README | -rw-r--r-- | 727 bytes |
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