From: Michael Tokarev <mjt@tls.msk.ru>
To: Linux-scsi@vger.kernel.org
Subject: why disk info gets printk'ed twice?
Date: Tue, 23 Oct 2007 01:37:28 +0400 [thread overview]
Message-ID: <471D1818.3070509@msgid.tls.msk.ru> (raw)
Every dmesg users provide contains double info
about identification of [scsi,ata,..] disk drives
found in the system. Here's mine:
scsi 2:0:0:0: Direct-Access ATA ST3808110AS n/a PQ: 0 ANSI: 5
loading module sd_mod
sd 2:0:0:0: [sda] 156301488 512-byte hardware sectors (80026 MB)
sd 2:0:0:0: [sda] Write Protect is off
sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 2:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
sd 2:0:0:0: [sda] 156301488 512-byte hardware sectors (80026 MB)
sd 2:0:0:0: [sda] Write Protect is off
sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 2:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7 >
sd 2:0:0:0: [sda] Attached SCSI disk
Why the lines beginning with "sd 2:0:0:0:" gets duplicated?
Can this be fixed somehow?
All the messages are in drivers/scsi/sd_mod.c, printed out by
functions called from within sd_revalidate_disk(). This routine
gets called from two contexts:
sd_store_cache_type(), which is a sysfs thing, it seems, and
sd_probe(), which gets called from .probe method of scsi_driver
So it seems to me that scsi_driver.probe() method gets called
twice for some reason...
This question has been asked several times, but I don't recall
any answers to it.
Thanks.
/mjt
next reply other threads:[~2007-10-22 21:45 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-22 21:37 Michael Tokarev [this message]
2007-10-23 0:08 ` why disk info gets printk'ed twice? David Miller
2007-10-23 0:13 ` Matthew Wilcox
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