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def77acf43
[ 158.514382] WARNING: CPU: 5 PID: 15251 at fs/io_uring.c:1141 io_free_batch_list+0x269/0x360
[ 158.514426] RIP: 0010:io_free_batch_list+0x269/0x360
[ 158.514437] Call Trace:
[ 158.514440] __io_submit_flush_completions+0xde/0x180
[ 158.514444] tctx_task_work+0x14a/0x220
[ 158.514447] task_work_run+0x64/0xa0
[ 158.514448] __do_sys_io_uring_enter+0x7c/0x970
[ 158.514450] __x64_sys_io_uring_enter+0x22/0x30
[ 158.514451] do_syscall_64+0x43/0x90
[ 158.514453] entry_SYSCALL_64_after_hwframe+0x44/0xae
We should not touch request internals including req->comp_list.next
after putting our ref if it's not final, e.g. we can start freeing
requests from the free cache.
Fixed: 62ca9cb93e7f8 ("io_uring: optimise io_free_batch_list()")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/b1f4df38fbb8f111f52911a02fd418d0283a4e6f.1634047298.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.