linux-kernel - Problem with size after growing a device

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <468A27B8.9000107@swip.net>
Date:	Tue, 03 Jul 2007 12:40:56 +0200
From:	Lars Michael Jogbäck <lm@...p.net>
To:	linux-kernel@...r.kernel.org
Subject: Problem with size after growing a device

Hi,

I don't know really which subsystem this, so I'm sending this to the 
linux-kernel list.
Please direct me to a more appropriate place if this is not correct.

I'm using a 3ware 9500 with Linux 2.6.18.1. I've grown the HW 
raid5-array and here is where the problem begins. After the card had 
expanded the array, I used "blockdev --rereadpt /dev/sdk" to get the 
kernel to recognize the now larger device. The last step was to do a 
"pvresize /dev/sdk". The problem is that pvresize still thought that the 
device was at the original size.

 From the lvm mailinglist I found out that pvresize used the same 
mechanism as "blockdev --getsz" to get the size of the disks, so I 
tested this and found that blockdev also reported the device to have the 
wrong size.

So, if I do:
# cat /sys/block/sdk/size
4882708480

and
# blockdev --getsz /dev/sdk
3906166784

Apparently /sys/block/sdk/size is updated with the new size, but 
whatever "blockdev --getsz" and "pvresize" is querying is not. If I 
reboot, everything works correctly.

Best Regards,
/LM

Ps. please keep me as Cc: on this; since I'm not subscibed to the 
linux-kernel list..

-
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/