From: Joe Eykholt <jeykholt-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
To: "devel-s9riP+hp16TNLxjTenLetw@public.gmane.org"
<devel-s9riP+hp16TNLxjTenLetw@public.gmane.org>,
Linux SCSI Mailing List
<linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: duplicated host_no
Date: Mon, 15 Jun 2009 23:05:50 -0700 [thread overview]
Message-ID: <4A37363E.7090605@cisco.com> (raw)
Cool bug. Two SCSI devs with the same host_id.
This is with fcoe and a bunch of patches in development.
I ran a loop including creating and deleting a bunch of fcoe instances on an MP system.
After 140 some times, I see this:
[ 7250.276749] scsi148 : FCoE Driver
[ 7250.276752] device eth0 entered promiscuous mode
[ 7250.276784] scsi148 : FCoE Driver
[ 7250.277526] host148: lport ffffffff: Entered RESET state from none state
[ 7250.277530] libfc: Link up on port ( 0)
[ 7250.277532] host148: lport 0: Entered FLOGI state from reset state
[ 7250.305961] ------------[ cut here ]------------
[ 7250.310653] WARNING: at fs/sysfs/dir.c:487 sysfs_add_one+0xc7/0xde()
[ 7250.317096] Hardware name: X7DB8
[ 7250.320372] sysfs: cannot create duplicate filename '/bus/scsi/devices/host148'
This is unlikely to show up in real life, but it can happen in
stress tests like this, and the system doesn't work so well afterwards.
I'll submit a patch that uses atomic_inc_return for the host numbers.
Joe
reply other threads:[~2009-06-16 6:05 UTC|newest]
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