From: bugzilla-daemon@kernel.org
To: linux-usb@vger.kernel.org
Subject: [Bug 221103] xhci_hcd: System lockup under CPU load during usbfs polling of USB devices on AMD platforms
Date: Mon, 31 Aug 2026 02:56:31 +0000 [thread overview]
Message-ID: <bug-221103-208809-7BV73Y2Ktd@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-221103-208809@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=221103
--- Comment #34 from Michał Pecio (michal.pecio@gmail.com) ---
Makes sense, I only suggested the alternative placement to confirm that this
line is really the trigger and not merely a timing accident.
Crazy idea - does anything change if you replace xhci_read_64() with readq()
and drop the 'xhci' argument? Probably not, but that would be a very cheap fix.
If not, it looks like the xHCI FW just isn't ready for action and it somehow
manages to bring down the whole CPU.
--
You may reply to this email to add a comment.
You are receiving this mail because:
You are watching the assignee of the bug.
next prev parent reply other threads:[~2026-08-31 2:56 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-18 14:52 [Bug 221103] New: xhci_hcd: System lockup under CPU load during rapid usbfs polling of SuperSpeed root hubs on AMD Ryzen platforms bugzilla-daemon
2026-02-20 7:30 ` [Bug 221103] xhci_hcd: System lockup under CPU load during usbfs polling of USB devices on AMD platforms bugzilla-daemon
2026-02-20 8:31 ` bugzilla-daemon
2026-02-20 9:17 ` Greg KH
2026-02-20 9:16 ` bugzilla-daemon
2026-02-20 9:17 ` bugzilla-daemon
2026-02-20 9:24 ` bugzilla-daemon
2026-02-20 9:26 ` bugzilla-daemon
2026-02-20 9:28 ` bugzilla-daemon
2026-02-20 9:40 ` bugzilla-daemon
2026-02-20 10:07 ` bugzilla-daemon
2026-02-20 10:17 ` Greg KH
2026-02-20 10:17 ` bugzilla-daemon
2026-02-20 10:21 ` bugzilla-daemon
2026-02-20 11:19 ` bugzilla-daemon
2026-02-20 14:07 ` bugzilla-daemon
2026-02-20 17:18 ` bugzilla-daemon
2026-02-21 1:12 ` bugzilla-daemon
2026-02-23 13:05 ` bugzilla-daemon
2026-02-23 17:52 ` bugzilla-daemon
2026-02-23 22:33 ` bugzilla-daemon
2026-02-24 7:45 ` bugzilla-daemon
2026-02-24 8:52 ` bugzilla-daemon
2026-02-24 10:19 ` bugzilla-daemon
2026-02-24 12:03 ` bugzilla-daemon
2026-02-24 12:21 ` bugzilla-daemon
2026-02-24 15:42 ` bugzilla-daemon
2026-03-08 17:56 ` bugzilla-daemon
2026-07-09 11:58 ` bugzilla-daemon
2026-08-28 3:49 ` bugzilla-daemon
2026-08-28 5:52 ` bugzilla-daemon
2026-08-28 12:19 ` bugzilla-daemon
2026-08-28 12:28 ` bugzilla-daemon
2026-08-30 1:50 ` bugzilla-daemon
2026-08-30 20:57 ` bugzilla-daemon
2026-08-30 21:51 ` bugzilla-daemon
2026-08-31 2:56 ` bugzilla-daemon [this message]
2026-08-31 15:51 ` bugzilla-daemon
2026-08-31 19:32 ` bugzilla-daemon
2026-09-01 1:56 ` bugzilla-daemon
2026-09-01 9:09 ` bugzilla-daemon
2026-09-01 9:41 ` bugzilla-daemon
2026-09-03 21:59 ` bugzilla-daemon
2026-09-03 22:12 ` bugzilla-daemon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=bug-221103-208809-7BV73Y2Ktd@https.bugzilla.kernel.org/ \
--to=bugzilla-daemon@kernel.org \
--cc=linux-usb@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.