lkml.org 
[lkml]   [2003]   [Aug]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
Subject[retry] deadlock (and mailer error)
(1) Deadlock

A few hours ago I wrote:

---
Now that I mentioned that inserting usb-storage hangs forever
and then causes a SCSI oops, the question arises how the hang
is caused. It turns out to be a semaphore deadlock.

What happens is that base/bus.c:bus_add_driver() downs
down_write(&bus->subsys.rwsem);
and then later usb/core/hub.c:usb_reset_device() downs
down_read(&gdev->bus->subsys.rwsem);

This is the same semaphore, and we have a deadlock.
---


(2) Mailer error

but vger didnt like this letter (?) and confusingly answered

---
The following addresses had permanent fatal errors
<linux-kernel@vger.kernel.org>

... while talking to vger.kernel.org.:
>>> MAIL From:<aeb@hera.cwi.nl.> SIZE=463
<<< 501-5.1.7 For input: <aeb@hera.cwi.nl.> SIZE=463
<<< 501 5.1.7 Path data: Spurious dot (.) at the end of the domain name
501 <linux-kernel@vger.kernel.org>... Data format error
<aeb@smtp.cwi.nl>... Deferred: Connection refused by hera.cwi.nl.
---

Andries
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:47    [W:0.038 / U:0.664 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site