Hi,
On Sep,Friday 12 2008, at 7:18 PM, rohit vashist wrote:
Hi,
I am currently working on device mapper and logical volume
manager.My question is whether dm-linear.c 's
function linear_ctr and linear_map is called or not when we do
lvcreate.(or vgcreate,pvcreate).I am concentrating
on linear mapping only.I did strace but i m not able to figure it out.
pvcreate and vgcreate are completely independent from device-mapper
driver. Only lvcreate and other lv
commands communicates with dm driver.
I'm not linux expert :), but I think that during lvcreate only
linear_ctr function is called. Because it allocates "linear context"
for loaded table. Context is probably some target specific
configuration memory
area.
linear_map is probably called only during IO. When is IO issued on
virtual device mapped to a real
block device.
Regards
Adam.
--
dm-devel mailing list
dm-devel@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/dm-devel
