From: Jens Axboe <axboe@kernel.dk>
To: io-uring@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, brauner@kernel.org
Subject: [PATCHSET 0/5] io_uring related epoll cleanups
Date: Sun, 3 May 2026 02:49:11 -0600 [thread overview]
Message-ID: <20260503085101.112698-1-axboe@kernel.dk> (raw)
Hi,
One of the nastier things about epoll is how it allows nesting contexts
inside each other, leading to the necessity of loop detection and the
issues that have come with that.
I don't believe there's any reason to support nesting on the io_uring
side, in fact IORING_OP_EPOLL_CTL is a historical mistake, imho. But
let's at least try and contain the damage and disallow nested contexts
from our side.
fs/eventpoll.c | 86 +++++++++++++++++++--------------------
include/linux/eventpoll.h | 8 ++++
io_uring/epoll.c | 18 +++++++-
3 files changed, 65 insertions(+), 47 deletions(-)
--
Jens Axboe
next reply other threads:[~2026-05-03 8:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-03 8:49 Jens Axboe [this message]
2026-05-03 8:49 ` [PATCH 1/5] eventpoll: pass struct epoll_filefd through ep_find() and ep_insert() Jens Axboe
2026-05-03 8:49 ` [PATCH 2/5] eventpoll: export is_file_epoll() Jens Axboe
2026-05-03 8:49 ` [PATCH 3/5] eventpoll: add file based control interface Jens Axboe
2026-05-03 8:49 ` [PATCH 4/5] io_uring/epoll: switch to using do_epoll_ctl_file() interface Jens Axboe
2026-05-03 8:49 ` [PATCH 5/5] io_uring/epoll: disallow adding an epoll file to an epoll context Jens Axboe
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