From: Jens Axboe <axboe@kernel.dk>
To: Christian Brauner <brauner@kernel.org>
Cc: io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCHSET 0/5] io_uring related epoll cleanups
Date: Tue, 12 May 2026 14:04:55 -0600 [thread overview]
Message-ID: <ab0c9639-e636-4603-9e86-2db2d139c472@kernel.dk> (raw)
In-Reply-To: <177861542127.846060.15247420422293788438.b4-review@b4>
On 5/12/26 1:50 PM, Christian Brauner wrote:
> On Sun, 03 May 2026 02:49:11 -0600, Jens Axboe <axboe@kernel.dk> wrote:
>> 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.
>
> I can stuff the epoll preliminaries onto
>
> vfs-7.2.eventpoll
>
> which is where the refactor I did lives and you can just pull it.
Sounds good to me - I'll send out a v2 with the rename of the
struct, then we can proceed from there.
--
Jens Axboe
prev parent reply other threads:[~2026-05-12 20:04 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-03 8:49 [PATCHSET 0/5] io_uring related epoll cleanups Jens Axboe
2026-05-03 8:49 ` [PATCH 1/5] eventpoll: pass struct epoll_filefd through ep_find() and ep_insert() Jens Axboe
2026-05-12 19:50 ` Christian Brauner
2026-05-03 8:49 ` [PATCH 2/5] eventpoll: export is_file_epoll() Jens Axboe
2026-05-12 19:50 ` Christian Brauner
2026-05-03 8:49 ` [PATCH 3/5] eventpoll: add file based control interface Jens Axboe
2026-05-12 19:50 ` Christian Brauner
2026-05-12 20:03 ` 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
2026-05-12 19:50 ` Christian Brauner
2026-05-12 20:04 ` Jens Axboe
2026-05-12 19:50 ` [PATCHSET 0/5] io_uring related epoll cleanups Christian Brauner
2026-05-12 20:04 ` Jens Axboe [this message]
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