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| author | Josef Bacik <josef@toxicpanda.com> | 2026-10-15 19:30:57 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-10-15 14:17:57 -0600 |
| commit | 9c151648780d89e5446e5f89f3fa2e416c3bb911 (patch) | |
| tree | 1a3a4102b68f3f229e9dd7eaa89d627110985a6a /tools/lib/python | |
| parent | 83cce67298ab1f4d2e9205a49f56975475cdb154 (diff) | |
io_uring/napi: make stale entries time out after 60s
With dynamic tracking a NAPI id that hasn't been seen for a minute is
meant to be dropped from the list the ring busy polls. The timeout is
added to jiffies, but it is defined as 60 * SEC_CONVERSION, and
SEC_CONVERSION isn't the number of jiffies in a second. It is the
internal factor of __timespec64_to_jiffies(), HZ scaled up by
SEC_JIFFIE_SC bits. For HZ=1000 that is 1000 << 22, which puts the
timeout at about eight years. On 32-bit the multiplication overflows.
So entries are never removed, and every id that a socket of the ring
ever had keeps being polled on each wait.
Fixes: 8d0c12a80cde ("io-uring: add napi busy poll support")
Assisted-by: LLM
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Link: https://patch.msgid.link/20261015-b4-io-uring-fixes-v1-33-c1556f5d7bf5@toxicpanda.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/lib/python')
0 files changed, 0 insertions, 0 deletions