From: Matthew Wilcox <matthew.r.wilcox@intel.com>
To: linux-scsi@vger.kernel.org
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>, willy@linux.intel.com
Subject: [PATCH 0/7] Performance improvements for LSI SCSI cards
Date: Thu, 27 Mar 2014 16:40:29 -0400 [thread overview]
Message-ID: <cover.1395952569.git.matthew.r.wilcox@intel.com> (raw)
The host lock is a serious scalability problem on 2-socket and larger
systems which are doing a lot of I/O. Before removing the temporary
usgae of DEF_SCSI_QCMD, we need to remove all uses of serial_number.
An unrelated performance issue is that reusing the most recent
driver-specific data structure to track the I/O instead of the least
recently used keeps the cache-hot lines in use, which is a nice
performance improvement. It's already present in the mpt3sas driver,
it just didn't make it into the fusion or mpt2sas drivers yet.
Matthew Wilcox (7):
mpt3sas: Remove uses of serial_number
mpt3sas: Remove use of DEF_SCSI_QCMD
mpt2sas: Remove uses of serial_number
mpt2sas: Remove use of DEF_SCSI_QCMD
mpt2sas: Add free smids to the head, not tail of list
fusion: Add free msg frames to the head, not tail of list
fusion: Remove use of DEF_SCSI_QCMD
drivers/message/fusion/mptbase.c | 2 +-
drivers/message/fusion/mptfc.c | 12 +++++-------
drivers/message/fusion/mptsas.c | 10 ++++------
drivers/message/fusion/mptscsih.c | 8 +++-----
drivers/message/fusion/mptscsih.h | 2 +-
drivers/message/fusion/mptspi.c | 12 +++++-------
drivers/scsi/mpt2sas/mpt2sas_base.c | 8 ++++----
drivers/scsi/mpt2sas/mpt2sas_base.h | 2 +-
drivers/scsi/mpt2sas/mpt2sas_ctl.c | 2 +-
drivers/scsi/mpt2sas/mpt2sas_scsih.c | 24 +++++++++---------------
drivers/scsi/mpt3sas/mpt3sas_base.h | 2 +-
drivers/scsi/mpt3sas/mpt3sas_ctl.c | 2 +-
drivers/scsi/mpt3sas/mpt3sas_scsih.c | 24 +++++++++---------------
13 files changed, 45 insertions(+), 65 deletions(-)
--
1.9.0
next reply other threads:[~2014-03-27 20:40 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-27 20:40 Matthew Wilcox [this message]
2014-03-27 20:40 ` [PATCH 1/7] mpt3sas: Remove uses of serial_number Matthew Wilcox
2014-04-02 10:39 ` Christoph Hellwig
2014-03-27 20:40 ` [PATCH 2/7] mpt3sas: Remove use of DEF_SCSI_QCMD Matthew Wilcox
2014-04-02 10:41 ` Christoph Hellwig
2014-04-02 13:20 ` Matthew Wilcox
2014-03-27 20:40 ` [PATCH 3/7] mpt2sas: Remove uses of serial_number Matthew Wilcox
2014-04-02 10:41 ` Christoph Hellwig
2014-03-27 20:40 ` [PATCH 4/7] mpt2sas: Remove use of DEF_SCSI_QCMD Matthew Wilcox
2014-03-27 20:40 ` [PATCH 5/7] mpt2sas: Add free smids to the head, not tail of list Matthew Wilcox
2014-04-02 10:41 ` Christoph Hellwig
2014-03-27 20:40 ` [PATCH 6/7] fusion: Add free msg frames " Matthew Wilcox
2014-04-02 10:42 ` Christoph Hellwig
2014-03-27 20:40 ` [PATCH 7/7] fusion: Remove use of DEF_SCSI_QCMD Matthew Wilcox
2014-03-31 5:54 ` [PATCH 0/7] Performance improvements for LSI SCSI cards Nicholas A. Bellinger
2014-04-02 8:06 ` Desai, Kashyap
2014-04-02 22:28 ` Krishnamoorthy, Praveen
2014-04-07 11:51 ` Reddy, Sreekanth
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