Le Fri, 29 Aug 2008 10:51:10 +0200,
Thomas Petazzoni <[EMAIL PROTECTED]> a écrit :
> So, who is doing the bounce buffering of the bio page when it's stored
> in ZONE_HIGHMEM ? Is it safe for a block driver to blindly use
> rq->buffer without knowing if the bio's page is in HIGHMEM or not ?
After
Hi,
In Linux Device Drivers, chapter 16 about Block Devices, page 12-13, a
simple block device request() method is presented:
static void sbull_request(request_queue_t *q)
{
struct request *req;
while ((req = elv_next_request(q)) != NULL) {
struct sbull_dev *dev = req->rq_disk->pr
