io-wq: fork worker threads from original task

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Instead of using regular kthread kernel threads, create kernel threads
that are like a real thread that the task would create. This ensures that
we get all the context that we need, without having to carry that state
around. This greatly reduces the code complexity, and the risk of missing
state for a given request type.

With the move away from kthread, we can also dump everything related to
assigned state to the new threads.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Jens Axboe 2021-02-16 14:15:30 -07:00

parent 6fb8f43ced

commit 3bfe610669

4 changed files with 116 additions and 198 deletions

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301

fs/io-wq.c

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3

fs/io-wq.h

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7

fs/io_uring.c

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3

include/linux/sched.h

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