From: Russell King - ARM Linux <linux@armlinux.org.uk>
To: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: yamada.masahiro@socionext.com, linux-mtd@lists.infradead.org,
dwmw2@infradead.org, marek.vasut@gmail.com,
computersforpeace@gmail.com,
thorsten.christiansson@idquantique.com,
laurent.monat@idquantique.com, dinguyen@kernel.org,
artem.bityutskiy@linux.intel.com, grmoore@opensource.altera.com,
ejo@pengutronix.de, chuanxiao.dong@intel.com,
mhiramat@kernel.org, jaswinder.singh@linaro.org, robh@kernel.org
Subject: Re: [RESEND PATCH v2 50/53] mtd: nand: allocate aligned buffers if NAND_OWN_BUFFERS is unset
Date: Tue, 28 Mar 2017 11:22:28 +0100 [thread overview]
Message-ID: <20170328102228.GX7909@n2100.armlinux.org.uk> (raw)
In-Reply-To: <20170328100721.0918dbda@bbrezillon>
On Tue, Mar 28, 2017 at 10:07:21AM +0200, Boris Brezillon wrote:
> Hm, it seems that alignment for kmalloc SLAB caches is set to
> ARCH_KMALLOC_MINALIGN which is set to ARCH_DMA_MINALIGN by default and
> ARCH_DMA_MINALIGN is usually equal to the L1 cache line size, so I was
> wrong here.
Yes, we set kmalloc() up to always return L1 cache line aligned data,
where "L1 cache line aligned" is the _maximum_ cache line alignment
that the kernel has been built for, not the cache line alignment of
the CPU we're running on.
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
next prev parent reply other threads:[~2017-03-28 10:23 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-23 0:17 [RESEND PATCH v2 27/53] mtd: nand: denali: avoid hard-coding ecc.strength and ecc.bytes Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 28/53] mtd: nand: denali: support "nand-ecc-strength" DT property Masahiro Yamada
2017-03-23 8:43 ` Boris Brezillon
2017-03-23 0:17 ` [RESEND PATCH v2 29/53] mtd: nand: denali: remove Toshiba and Hynix specific fixup code Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 30/53] mtd: nand: denali_dt: add compatible strings for UniPhier SoC variants Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 31/53] mtd: nand: denali: set NAND_ECC_CUSTOM_PAGE_ACCESS Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 32/53] mtd: nand: denali: do not propagate NAND_STATUS_FAIL to waitfunc() Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 33/53] mtd: nand: denali: use BIT() and GENMASK() for register macros Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 34/53] mtd: nand: denali: remove unneeded find_valid_banks() Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 35/53] mtd: nand: denali: handle timing parameters by setup_data_interface() Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 36/53] mtd: nand: denali: remove meaningless pipeline read-ahead operation Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 37/53] mtd: nand: denali: rework interrupt handling Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 38/53] mtd: nand: denali: fix NAND_CMD_STATUS handling Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 39/53] mtd: nand: denali: fix NAND_CMD_PARAM handling Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 40/53] mtd: nand: do not check R/B# for CMD_READID in nand_command(_lp) Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 41/53] mtd: nand: do not check R/B# for CMD_SET_FEATURES " Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 42/53] mtd: nand: denali: switch over to cmd_ctrl instead of cmdfunc Masahiro Yamada
2017-03-23 8:52 ` Boris Brezillon
2017-03-23 0:17 ` [RESEND PATCH v2 43/53] mtd: nand: denali: fix bank reset function Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 44/53] mtd: nand: denali: use interrupt instead of polling for bank reset Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 45/53] mtd: nand: denali: propagate page to helpers via function argument Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 46/53] mtd: nand: denali: merge struct nand_buf into struct denali_nand_info Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 47/53] mtd: nand: denali: use flag instead of register macro for direction Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 48/53] mtd: nand: denali: fix raw and oob accessors for syndrome page layout Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 49/53] mtd: nand: denali: support hardware-assisted erased page detection Masahiro Yamada
2017-03-23 0:17 ` [RESEND PATCH v2 50/53] mtd: nand: allocate aligned buffers if NAND_OWN_BUFFERS is unset Masahiro Yamada
2017-03-27 8:00 ` Boris Brezillon
2017-03-28 1:13 ` yamada.masahiro
2017-03-28 7:59 ` Boris Brezillon
2017-03-28 8:07 ` Boris Brezillon
2017-03-28 10:22 ` Russell King - ARM Linux [this message]
2017-03-28 10:17 ` Russell King - ARM Linux
2017-03-28 12:13 ` Boris Brezillon
2017-03-29 3:22 ` yamada.masahiro
2017-03-29 7:03 ` Boris Brezillon
2017-03-23 0:18 ` [RESEND PATCH v2 51/53] mtd: nand: denali: skip driver internal bounce buffer when possible Masahiro Yamada
2017-03-23 0:18 ` [RESEND PATCH v2 52/53] mtd: nand: denali: use non-managed kmalloc() for DMA buffer Masahiro Yamada
2017-03-23 11:33 ` Robin Murphy
2017-03-24 1:41 ` yamada.masahiro
2017-03-24 17:09 ` Robin Murphy
2017-03-23 0:18 ` [RESEND PATCH v2 53/53] mtd: nand: denali: enable bad block table scan Masahiro Yamada
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