From: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: Michael Schmitz <schmitzmic@gmail.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Christoph Hellwig <hch@lst.de>,
linux-ide@vger.kernel.org, linux-m68k@lists.linux-m68k.org,
linux-kernel@vger.kernel.org, b.zolnierkie@samsung.com
Subject: [PATCH v3 00/27] ata: optimize core code size on PATA only setups
Date: Thu, 27 Feb 2020 19:21:59 +0100 [thread overview]
Message-ID: <20200227182226.19188-1-b.zolnierkie@samsung.com> (raw)
In-Reply-To: CGME20200227182238eucas1p1a4a5546e46b2385057f41528bd759aea@eucas1p1.samsung.com
Hi,
There have been reports in the past of libata core code size
being a problem in migration from deprecated IDE subsystem on
legacy PATA only systems, i.e.:
https://lore.kernel.org/linux-ide/db2838b7-4862-785b-3a1d-3bf09811340a@gmail.com/
This patchset re-organizes libata core code to exclude SATA
specific code from being built for PATA only setups.
The end result is up to 24% (by 23949 bytes, from 101769 bytes to
77820 bytes) smaller libata core code size (as measured for m68k
arch using modified atari_defconfig) on affected setups.
I've tested this patchset using pata_falcon driver under ARAnyM
emulator.
patches #1-11 are general fixes/cleanups done in the process of
making the patchset (there should be no inter-dependencies between
them except patch #10 which depends on patch #9)
patch #12 separates PATA timings code to libata-pata-timings.c file
patches #13-15 let compiler optimize out SATA specific code on
non-SATA hosts by adding !IS_ENABLED(CONFIG_SATA_HOST) instances
patches #16-22 separate SATA only code from libata-core.c file to
libata-sata.c one
patches #23-24 separate SATA only code from libata-scsi.c file to
libata-sata.c one
patches #25-26 separate SATA only code from libata-eh.c file to
libata-sata.c one
patch #27 makes "libata.force" kernel parameter optional
Changes since v2
(https://lore.kernel.org/linux-ide/20200207142734.8431-1-b.zolnierkie@samsung.com/):
- rebased on top of next-20200227
- added "ata: optimize ata_scsi_rbuf[] size" patch
Changes since v1
(https://lore.kernel.org/linux-ide/20200128133343.29905-1-b.zolnierkie@samsung.com/):
- added Acked-by: tag from Tejun to "ata: remove stale maintainership
information from core code" patch
- added Reviewed-by: tag from Martin to "ata: make SATA_PMP option
selectable only if any SATA host driver is enabled" patch
- added Reviewed-by: tag from Christoph to following patches:
- "ata: simplify ata_scsiop_inq_89()"
- "ata: use COMMAND_LINE_SIZE for ata_force_param_buf[] size"
- "ata: optimize struct ata_force_param size"
- "ata: move EXPORT_SYMBOL_GPL()s close to exported code"
- "ata: remove EXPORT_SYMBOL_GPL()s not used by modules"
- converted "ata: add CONFIG_SATA_HOST=n version of ata_ncq_enabled()"
patch to use IS_ENABLED()
- added "ata: let compiler optimize out ata_dev_config_ncq() on
non-SATA hosts" and "ata: let compiler optimize out ata_eh_set_lpm()
on non-SATA hosts" patches
- moved "ata: move sata_scr_*() to libata-core-sata.c" patch just
after "ata: start separating SATA specific code from libata-core.c"
one
- dropped no longer needed patches (code savings <= 8 bytes):
- "ata: move ata_do_link_spd_horkage() to libata-core-sata.c"
- "ata: move ata_dev_config_ncq*() to libata-core-sata.c"
- "ata: move sata_print_link_status() to libata-core-sata.c"
- "ata: move sata_down_spd_limit() to libata-core-sata.c"
- "ata: move sata_link_init_spd() to libata-core-sata.c"
- "ata: move ata_eh_set_lpm() to libata-core-sata.c"
- removed superfluos ifdefs
- dropped file names in top of file headers
- merged libata-scsi-sata.c and libata-eh-sata.c into libata-sata.c
- emphasised in patch descriptions that atari_defconfig used for
measurements has been modified (original one is still using
deprecated IDE subsystem)
- added "ata: make "libata.force" kernel parameter optional" patch
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
Bartlomiej Zolnierkiewicz (27):
ata: remove stale maintainership information from core code
ata: expose ncq_enable_prio sysfs attribute only on NCQ capable hosts
ata: make SATA_PMP option selectable only if any SATA host driver is
enabled
sata_promise: use ata_cable_sata()
ata: simplify ata_scsiop_inq_89()
ata: use COMMAND_LINE_SIZE for ata_force_param_buf[] size
ata: optimize struct ata_force_param size
ata: optimize ata_scsi_rbuf[] size
ata: move EXPORT_SYMBOL_GPL()s close to exported code
ata: remove EXPORT_SYMBOL_GPL()s not used by modules
ata: fix CodingStyle issues in PATA timings code
ata: separate PATA timings code from libata-core.c
ata: add CONFIG_SATA_HOST=n version of ata_ncq_enabled()
ata: let compiler optimize out ata_dev_config_ncq() on non-SATA hosts
ata: let compiler optimize out ata_eh_set_lpm() on non-SATA hosts
ata: start separating SATA specific code from libata-core.c
ata: move sata_scr_*() to libata-sata.c
ata: move *sata_set_spd*() to libata-sata.c
ata: move sata_link_{debounce,resume}() to libata-sata.c
ata: move sata_link_hardreset() to libata-sata.c
ata: move ata_qc_complete_multiple() to libata-sata.c
ata: move sata_deb_timing_*() to libata-sata.c
ata: start separating SATA specific code from libata-scsi.c
ata: move ata_sas_*() to libata-sata.c
ata: start separating SATA specific code from libata-eh.c
ata: move ata_eh_analyze_ncq_error() & co. to libata-sata.c
ata: make "libata.force" kernel parameter optional
drivers/ata/Kconfig | 77 ++
drivers/ata/Makefile | 2 +
drivers/ata/libata-core.c | 1126 ++--------------------
drivers/ata/libata-eh.c | 224 +----
drivers/ata/libata-pata-timings.c | 192 ++++
drivers/ata/libata-sata.c | 1483 +++++++++++++++++++++++++++++
drivers/ata/libata-scsi.c | 544 +----------
drivers/ata/libata-sff.c | 4 -
drivers/ata/libata.h | 25 +-
drivers/ata/sata_promise.c | 8 +-
drivers/scsi/Kconfig | 1 +
drivers/scsi/libsas/Kconfig | 1 +
include/linux/libata.h | 163 ++--
13 files changed, 2009 insertions(+), 1841 deletions(-)
create mode 100644 drivers/ata/libata-pata-timings.c
create mode 100644 drivers/ata/libata-sata.c
--
2.24.1
next parent reply other threads:[~2020-02-27 18:22 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20200227182238eucas1p1a4a5546e46b2385057f41528bd759aea@eucas1p1.samsung.com>
2020-02-27 18:21 ` Bartlomiej Zolnierkiewicz [this message]
[not found] ` <CGME20200227182239eucas1p1166cd4b92fc84479634d6bcf67a672cf@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 01/27] ata: remove stale maintainership information from core code Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182239eucas1p2fe76dcb686bea8f0a527461807b9292e@eucas1p2.samsung.com>
2020-02-27 18:22 ` [PATCH v3 02/27] ata: expose ncq_enable_prio sysfs attribute only on NCQ capable hosts Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182240eucas1p1035546a1fb97cfb9920542af289bf5ca@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 03/27] ata: make SATA_PMP option selectable only if any SATA host driver is enabled Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182240eucas1p272bac5df6668bbb7fee7638b4022a7b1@eucas1p2.samsung.com>
2020-02-27 18:22 ` [PATCH v3 04/27] sata_promise: use ata_cable_sata() Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182241eucas1p10cf24570346137befa34c6fd800db058@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 05/27] ata: simplify ata_scsiop_inq_89() Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182241eucas1p12ef86c45356afb2230871d84dab04431@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 06/27] ata: use COMMAND_LINE_SIZE for ata_force_param_buf[] size Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182242eucas1p16f2af7ee2771f11f21f35c7f80636723@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 07/27] ata: optimize struct ata_force_param size Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182242eucas1p1c1de818156ec670f4744725618375303@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 08/27] ata: optimize ata_scsi_rbuf[] size Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182243eucas1p138c6ac2b516bf318680498caf05ed8df@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 09/27] ata: move EXPORT_SYMBOL_GPL()s close to exported code Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182243eucas1p2d95b61a6a3941ffd3bbead3a6ff4a813@eucas1p2.samsung.com>
2020-02-27 18:22 ` [PATCH v3 10/27] ata: remove EXPORT_SYMBOL_GPL()s not used by modules Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182244eucas1p1e8e9e9567acda2a8cd02844685b6b12a@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 11/27] ata: fix CodingStyle issues in PATA timings code Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182244eucas1p200b1a33d037208b1998a2c9c659ae6f6@eucas1p2.samsung.com>
2020-02-27 18:22 ` [PATCH v3 12/27] ata: separate PATA timings code from libata-core.c Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182245eucas1p219dee00956358ee0018caf2a07a8d602@eucas1p2.samsung.com>
2020-02-27 18:22 ` [PATCH v3 13/27] ata: add CONFIG_SATA_HOST=n version of ata_ncq_enabled() Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182245eucas1p22d7a52d7786fc8cdfa4dc898662ef087@eucas1p2.samsung.com>
2020-02-27 18:22 ` [PATCH v3 14/27] ata: let compiler optimize out ata_dev_config_ncq() on non-SATA hosts Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182246eucas1p2b20cf3379bb774d236e53301e2180252@eucas1p2.samsung.com>
2020-02-27 18:22 ` [PATCH v3 15/27] ata: let compiler optimize out ata_eh_set_lpm() " Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182246eucas1p1d189bdc4d74efcd0c08193ce81b7acd7@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 16/27] ata: start separating SATA specific code from libata-core.c Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182247eucas1p2d83a212c200832402cc17817fab4f650@eucas1p2.samsung.com>
2020-02-27 18:22 ` [PATCH v3 17/27] ata: move sata_scr_*() to libata-sata.c Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182247eucas1p1e9042300d9ad7dd56a1319afb980bdfe@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 18/27] ata: move *sata_set_spd*() " Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182248eucas1p12ce0e7ce8d0653085591eea64604c656@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 19/27] ata: move sata_link_{debounce,resume}() " Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182248eucas1p296773cdb2ab7ae9f4114f7052ff08414@eucas1p2.samsung.com>
2020-02-27 18:22 ` [PATCH v3 20/27] ata: move sata_link_hardreset() " Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182248eucas1p12149429eae76c2a869d7323ab9abff1e@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 21/27] ata: move ata_qc_complete_multiple() " Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182249eucas1p14e64b8693929cd84a289909bbdb4506e@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 22/27] ata: move sata_deb_timing_*() " Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182249eucas1p19b8af9cc8b7e8fac33cf400702322c7d@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 23/27] ata: start separating SATA specific code from libata-scsi.c Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182250eucas1p1885e8264beb19b9d6eba638748fd1ff0@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 24/27] ata: move ata_sas_*() to libata-sata.c Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182250eucas1p2140d4ae6f3f65f2b712027dab63de3bd@eucas1p2.samsung.com>
2020-02-27 18:22 ` [PATCH v3 25/27] ata: start separating SATA specific code from libata-eh.c Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182251eucas1p1857e44a8f0860829e821748464bb936d@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 26/27] ata: move ata_eh_analyze_ncq_error() & co. to libata-sata.c Bartlomiej Zolnierkiewicz
[not found] ` <CGME20200227182251eucas1p1f8f29d3df1a07a6997e3b7c3a3176cb3@eucas1p1.samsung.com>
2020-02-27 18:22 ` [PATCH v3 27/27] ata: make "libata.force" kernel parameter optional Bartlomiej Zolnierkiewicz
2020-03-12 14:09 ` [PATCH v3 00/27] ata: optimize core code size on PATA only setups Jens Axboe
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