https://bugzilla.kernel.org/show_bug.cgi?id=195607
Bug ID: 195607
Summary: Megaraid_sas raidcard hotswap wouldn't work if hold
the fd of block devcie in user space
Product: SCSI Drivers
Version: 2.5
Kernel Version: 3.10.0
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
Assignee: [email protected]
Reporter: [email protected]
Regression: No
reproduce :
1.choose a megaraid sas series raidcard, for example:
LSI Logic / Symbios Logic MegaRAID　SAS 2008 [Falcon] (rev 03)
2. configure the raid card as HBA card (all disks are jbod mode)
We assume /dev/sdb is attached to this raid card
3.run process:
fd = open("/dev/sdb", O_RDWR);
while (1) {
sleep (10);
}
4. run "udevadm monitor" watch udev message in a new shell
5.unplug disk sdb and then insert
We can see new udev message about disk's hotswap
6.redo process 5
There will be no udev message only if you reboot the server
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