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Pavel Begunkov c42bca92be bio: don't copy bvec for direct IO 
The block layer spends quite a while in blkdev_direct_IO() to copy and
initialise bio's bvec. However, if we've already got a bvec in the input
iterator it might be reused in some cases, i.e. when new
ITER_BVEC_FLAG_FIXED flag is set. Simple tests show considerable
performance boost, and it also reduces memory footprint.

Suggested-by: Matthew Wilcox <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Pavel Begunkov <[email protected]>
Reviewed-by: Ming Lei <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
2021-01-25 08:58:24 -07:00
..
ABI
Merge tag 'driver-core-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
2021-01-24 11:05:48 -08:00
accounting
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admin-guide
dm integrity: conditionally disable "recalculate" feature
2021-01-21 15:05:21 -05:00
arm
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux
2020-12-22 13:34:27 -08:00
arm64
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2020-12-20 10:44:05 -08:00
block
bvec/iter: disallow zero-length segment bvecs
2021-01-25 08:58:24 -07:00
bpf
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cdrom
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core-api
atomic: remove further references to atomic_ops
2020-12-31 15:51:33 -07:00
cpu-freq
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crypto
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dev-tools
kasan: fix HW_TAGS boot parameters
2021-01-24 10:34:52 -08:00
devicetree
Merge tag 'staging-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
2021-01-24 11:02:01 -08:00
doc-guide
Documentation: doc-guide: fixes to sphinx.rst
2020-12-31 15:49:51 -07:00
driver-api
Merge tag 'rtc-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
2020-12-20 10:12:06 -08:00
fault-injection
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fb
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features
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux
2020-12-22 13:34:27 -08:00
filesystems
bio: don't copy bvec for direct IO
2021-01-25 08:58:24 -07:00
firmware_class
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firmware-guide
Documentation: ACPI: EINJ: Fix error type values for PCIe errors
2021-01-14 13:11:25 +01:00
fpga
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gpu
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hid
Merge branch 'for-5.11/core' into for-linus
2020-12-16 11:38:38 +01:00
hwmon
hwmon: (sbtsi_temp) Fix Documenation kernel-doc warning
2020-12-30 08:05:20 -08:00
i2c
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ia64
docs: archis: add a per-architecture features list
2020-12-03 15:10:15 -07:00
ide
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iio
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infiniband
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input
Input: document inhibiting
2020-12-02 22:10:37 -08:00
isdn
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kbuild
Documentation: kbuild: Fix section reference
2021-01-11 05:14:38 +09:00
kernel-hacking
docs: Fix reST markup when linking to sections
2020-12-31 15:44:47 -07:00
leds
Merge tag 'leds-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds
2020-12-16 14:56:29 -08:00
litmus-tests
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livepatch
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locking
Documentation: seqlock: s/LOCKTYPE/LOCKNAME/g
2020-12-09 17:08:49 +01:00
m68k
docs: archis: add a per-architecture features list
2020-12-03 15:10:15 -07:00
maintainer
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mhi
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mips
docs: archis: add a per-architecture features list
2020-12-03 15:10:15 -07:00
misc-devices
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netlabel
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networking
net: Disable NETIF_F_HW_TLS_RX when RXCSUM is disabled
2021-01-19 15:58:05 -08:00
nios2
docs: nios2: add missing ReST file
2020-12-07 08:35:21 -07:00
nvdimm
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openrisc
docs: archis: add a per-architecture features list
2020-12-03 15:10:15 -07:00
parisc
docs: archis: add a per-architecture features list
2020-12-03 15:10:15 -07:00
PCI
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pcmcia
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power
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powerpc
docs: archis: add a per-architecture features list
2020-12-03 15:10:15 -07:00
process
docs: remove mention of ENABLE_MUST_CHECK
2021-01-07 14:41:38 -07:00
RCU
docs: Fix reST markup when linking to sections
2020-12-31 15:44:47 -07:00
riscv
docs: archis: add a per-architecture features list
2020-12-03 15:10:15 -07:00
s390
docs: archis: add a per-architecture features list
2020-12-03 15:10:15 -07:00
scheduler
Merge tag 'pm-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2020-12-15 16:30:31 -08:00
scsi
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security
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sh
docs: archis: add a per-architecture features list
2020-12-03 15:10:15 -07:00
sound
Merge tag 'sound-5.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
2021-01-13 11:55:14 -08:00
sparc
docs: archis: add a per-architecture features list
2020-12-03 15:10:15 -07:00
sphinx
Merge tag 'kbuild-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2020-12-22 14:02:39 -08:00
sphinx-static
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spi
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staging
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target
tweewide: Fix most Shebang lines
2020-12-08 23:30:04 +09:00
timers
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trace
Merge tag 'kbuild-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2020-12-22 14:02:39 -08:00
translations
Merge tag 'net-next-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2020-12-15 13:22:29 -08:00
usb
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userspace-api
Merge tag 'x86_sgx_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-12-14 13:14:57 -08:00
virt
Merge tag 'kvmarm-fixes-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
2021-01-08 05:02:40 -05:00
vm
mm/lru: revise the comments of lru_lock
2020-12-15 14:48:04 -08:00
w1
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watchdog
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x86
Merge tag 'docs-5.11' of git://git.lwn.net/linux
2020-12-14 16:55:54 -08:00
xtensa
Merge tag 'docs-5.11' of git://git.lwn.net/linux
2020-12-14 16:55:54 -08:00
.gitignore
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asm-annotations.rst
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atomic_bitops.txt
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atomic_t.txt
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Changes
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CodingStyle
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conf.py
docs: Note that sphinx 1.7 will be required soon
2020-12-11 13:53:38 -07:00
COPYING-logo
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docutils.conf
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dontdiff
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index.rst
docs: archis: add a per-architecture features list
2020-12-03 15:10:15 -07:00
Kconfig
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logo.gif
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Makefile
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memory-barriers.txt
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SubmittingPatches
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watch_queue.rst
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