Nicholas Bellinger 5f544cfac9 tcm_fc: Convert to per-cpu command map pre-allocation of ft_cmd ... This patch converts tcm_fc to use transport_init_session_tags() pre-allocation logic for struct ft_cmd descriptors using per-cpu session tag pooling in order to effectively avoid memory allocation + release for each received I/O. It adds percpu_ida_alloc() in ft_recv_cmd() to obtain an tag and locate ft_cmd from se_sess->sess_cmd_map[], and percpu_ida_free() in ft_free_cmd() to release the tag based upon se_cmd->map_tag id. It also uses a TCM_FC_DEFAULT_TAGS value of 512, that puts the per se_sess->sess_cmd_map allocation at ~360K on 64-bit. v2 changes: - Handle possible tag < 0 failure with GFP_ATOMIC Cc: Mark Rustad <mark.d.rustad@intel.com> Cc: Robert Love <robert.w.love@intel.com> Cc: Kent Overstreet <kmo@daterainc.com> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>		2013-10-01 21:40:55 -07:00
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Kconfig	[SCSI] tcm_fc: Adding FC_FC4 provider (tcm_fc) for FCoE target (TCM - target core) support	2011-05-17 10:52:46 +04:00
Makefile	tcm_fc: Makefile cleanups	2011-07-22 09:37:47 +00:00
tcm_fc.h	tcm_fc: Convert to per-cpu command map pre-allocation of ft_cmd	2013-10-01 21:40:55 -07:00
tfc_cmd.c	tcm_fc: Convert to per-cpu command map pre-allocation of ft_cmd	2013-10-01 21:40:55 -07:00
tfc_conf.c	target: replace strict_strto*() with kstrto*()	2013-08-12 20:31:44 -07:00
tfc_io.c	tcm_fc: Check for aborted sequence	2013-04-25 01:05:28 -07:00
tfc_sess.c	tcm_fc: Convert to per-cpu command map pre-allocation of ft_cmd	2013-10-01 21:40:55 -07:00