On Tue, Mar 19, 2013 at 2:06 PM, folkert <[email protected]> wrote:
>> > > Am I right that discard/trim is in kernel 3.9? Or is it already in 3.8?
>> > Patch was merged into Linus's tree on 5Oct12, so it should have made 3.7.
>>
>> There are problems with it, it seems.
Doesn't seem to be anything related to trim/discard. Does your kernel
have the kill_bdev calls in nbd? Look for:
@@ -627,6 +635,7 @@ static int __nbd_ioctl(struct block_devi
nbd_clear_que(nbd);
BUG_ON(!list_empty(&nbd->queue_head));
BUG_ON(!list_empty(&nbd->waiting_queue));
+ kill_bdev(bdev);
if (file)
fput(file);
return 0;
@@ -719,6 +728,7 @@ static int __nbd_ioctl(struct block_devi
nbd->file = NULL;
nbd_clear_que(nbd);
dev_warn(disk_to_dev(nbd->disk), "queue cleared\n");
+ kill_bdev(bdev);
queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, nbd->disk->queue);
if (file)
fput(file);
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