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authorVasu Dev <vasu.dev@intel.com>2009-05-06 10:52:34 -0700
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-06-08 13:29:13 -0500
commit4bb6b5153313269b4b328f4f5ddc558c45c50713 (patch)
treea75bdbf690d9f91b7486db40515b61302a44e12b /fs/freevxfs/vxfs_immed.c
parent30121d14f503dac056ee7f68d99eb5d548899b59 (diff)
[SCSI] fcoe: reduces lock cost when adding a new skb to fcoe_pending_queue
Currently fcoe_pending_queue.lock held twice for every new skb adding to this queue when already least one pkt is pending in this queue and that is not uncommon once skb pkts starts getting queued here upon fcoe_start_io => dev_queue_xmit failure. This patch moves most fcoe_pending_queue logic to fcoe_check_wait_queue function, this new logic grabs fcoe_pending_queue.lock only once to add a new skb instead twice as used to be. I think after this patch call flow around fcoe_check_wait_queue calling in fcoe_xmit is bit simplified with modified fcoe_check_wait_queue function taking care of adding and removing pending skb in one function. Signed-off-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'fs/freevxfs/vxfs_immed.c')
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