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Commit cca87bc9 authored by Javier González's avatar Javier González Committed by Jens Axboe
Browse files

lightnvm: do not assume sequential lun alloc. 



When doing GC, rrpc calculates the physical LUN to which the rrpc block
belongs too. This calculation is based on the assumption that LUNs are
assigned sequentially to the LUN list. Use the reference to the LUN
instead. This saves us the calculation and allows us to align LUNs in a
different manner to, for example, take advantage of devide parallelism.

Signed-off-by: default avatarJavier González <javier@cnexlabs.com>
Signed-off-by: default avatarMatias Bjørling <m@bjorling.me>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent b86d8d36

drivers/lightnvm/rrpc.c

+2 −3
Original line number Diff line number Diff line
@@ -405,9 +405,8 @@ static void rrpc_block_gc(struct work_struct *work) 
									ws_gc);

	struct rrpc *rrpc = gcb->rrpc;

	struct rrpc_block *rblk = gcb->rblk;

	struct rrpc_lun *rlun = rblk->rlun;

	struct nvm_dev *dev = rrpc->dev;

	struct nvm_lun *lun = rblk->parent->lun;

	struct rrpc_lun *rlun = &rrpc->luns[lun->id - rrpc->lun_offset];



	mempool_free(gcb, rrpc->gcb_pool);

	pr_debug("nvm: block '%lu' being reclaimed\n", rblk->parent->id);
@@ -508,9 +507,9 @@ static void rrpc_gc_queue(struct work_struct *work) 
									ws_gc);

	struct rrpc *rrpc = gcb->rrpc;

	struct rrpc_block *rblk = gcb->rblk;

	struct rrpc_lun *rlun = rblk->rlun;

	struct nvm_lun *lun = rblk->parent->lun;

	struct nvm_block *blk = rblk->parent;

	struct rrpc_lun *rlun = &rrpc->luns[lun->id - rrpc->lun_offset];



	spin_lock(&rlun->lock);

	list_add_tail(&rblk->prio, &rlun->prio_list);