linux-kernel - Re: [linux-usb-devel] khubd and ent:sda1 sucking CPU with reiser4 + USB HD

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <Pine.LNX.4.44L0.0703061035030.3401-100000@iolanthe.rowland.org>
Date:	Tue, 6 Mar 2007 10:36:20 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	ebuddington@...leyan.edu, Oliver Neukum <oneukum@...e.de>
cc:	USB development list <linux-usb-devel@...ts.sourceforge.net>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: [linux-usb-devel] khubd and ent:sda1 sucking CPU with reiser4
 + USB HD

On Tue, 6 Mar 2007, Oliver Neukum wrote:

> > Am Dienstag, 6. MÃ¤rz 2007 05:13 schrieb Eric Buddington:
> > reiser4[khubd(163)]: commit_current_atom (fs/reiser4/txnmgr.c:1049)[nikita-3176]:
> > WARNING: Flushing like mad: 16384
> > reiser4[khubd(163)]: commit_current_atom (fs/reiser4/txnmgr.c:1049)[nikita-3176]:
> > WARNING: Flushing like mad: 32768
> > ...<many simiar messages>
> > 
> > Most problematically, khubd and ent:sda1! are conspiring to suck 100%
> > CPU time, even after powering off the drive. A bunch of processes are
> > stuck in 'D' state, possibly because they're trying to access the dead
> > disk, which won't umount ("device is busy").
> 
> It looks like khubd allocates memory and enters reiser4. Possibly we have
> GFP_KERNEL in khubd where we should have GFP_NOIO or reiser4 has
> a problem dealing with IO failures.

A more complete stack trace (for example, Alt-SysRq-T) would help.

Alan Stern

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