Public bug reported:
[ Impact ]
Using eventfd feature of io_uring causes system hangs when using eventfd
test [1], as commit [2] states, it needs the cherry-pick of the of
commit [3] but also [4] to expose the IORING_FEAT_CUR_PERSONALITY
feature (and maybe the commits in between).
[ Test case ]
- Compile liburing and run test/eventfd
- The test should run properly and not skipped
+ If only [3] is cherry-picked (that should be enough), the test should run
once the skip code part is commented out.
[ Regression potential ]
These patches are already part of linux 5.6
[1] https://git.kernel.dk/cgit/liburing/tree/test/eventfd.c
[2] https://git.kernel.dk/cgit/liburing/commit/test/eventfd.c?id=dbebec80
[3] https://github.com/torvalds/linux/commit/50167d5bc585
[4] https://github.com/torvalds/linux/commit/cccf0ee83455
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1872092
Title:
io_uring eventfd is not working in 5.4.0
Status in linux package in Ubuntu:
New
Bug description:
[ Impact ]
Using eventfd feature of io_uring causes system hangs when using
eventfd test [1], as commit [2] states, it needs the cherry-pick of
the of commit [3] but also [4] to expose the
IORING_FEAT_CUR_PERSONALITY feature (and maybe the commits in
between).
[ Test case ]
- Compile liburing and run test/eventfd
- The test should run properly and not skipped
+ If only [3] is cherry-picked (that should be enough), the test should run
once the skip code part is commented out.
[ Regression potential ]
These patches are already part of linux 5.6
[1] https://git.kernel.dk/cgit/liburing/tree/test/eventfd.c
[2] https://git.kernel.dk/cgit/liburing/commit/test/eventfd.c?id=dbebec80
[3] https://github.com/torvalds/linux/commit/50167d5bc585
[4] https://github.com/torvalds/linux/commit/cccf0ee83455
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