when I am studying blktap mechanism , I faced a problem that I can''t
understand.
In tapdisk.c(xen-3.3.0/tools/blktap/drivers) line 687-689
page = (char *)MMAP_VADDR(info->vstart,
(unsigned long)req->id, i);
page += (req->seg[i].first_sect << SECTOR_SHIFT);
how was the page address caculated? I am not quite understanding.
thanks a lot!
--
Min Li
School of Computer Science and Technology
Cluster and Grid Computing Lab
Services Computing Technology and System Lab
Huazhong University of Science and Technology
Wuhan, 430074, China
Tel: 13986251431 027-65236831
Email: fly.limin@gmail.com
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