Hello all xen-developers,
I have a query regarding "HOW BIOS VIRTUALISE IN DOMU" in case of
paravirtualisation
or full virtualisation. Actually the doubts comes when i read the code of
blkback.c
i write the code below...
while ((bio == NULL) ||
(bio_add_page(bio,
virt_to_page(vaddr(pending_req, i)),
seg[i].nsec << 9,
seg[i].buf & ~PAGE_MASK) == 0)) {
bio = biolist[nbio++] = bio_alloc(GFP_KERNEL, nseg-i);
if (unlikely(bio == NULL))
goto fail_put_bio;
bio->bi_bdev = preq.bdev;
bio->bi_private = pending_req;
bio->bi_end_io = end_block_io_op;
bio->bi_sector = preq.sector_number;
}
pls if anyone can explain, pls mail me.
e-mailid:amit.singh@nechclst.in
With regards:
AMIT KR. SINGH
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