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 <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2021-01-25 08:58:24 -07:00
..
ABI	Driver core fixes for 5.11-rc5	2021-01-24 11:05:48 -08:00
accounting
admin-guide	dm integrity: conditionally disable "recalculate" feature	2021-01-21 15:05:21 -05:00
arm	ARM updates for 5.11:	2020-12-22 13:34:27 -08:00
arm64	ARM:	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
cdrom
core-api	atomic: remove further references to atomic_ops	2020-12-31 15:51:33 -07:00
cpu-freq
crypto
dev-tools	kasan: fix HW_TAGS boot parameters	2021-01-24 10:34:52 -08:00
devicetree	Staging/IIO fixes for 5.11-rc5	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	RTC for 5.11	2020-12-20 10:12:06 -08:00
fault-injection
fb
features	ARM updates for 5.11:	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
firmware-guide	Documentation: ACPI: EINJ: Fix error type values for PCIe errors	2021-01-14 13:11:25 +01:00
fpga
gpu	drm/docs: Fix todo.rst	2020-11-18 11:51:58 +01:00
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
ia64	docs: archis: add a per-architecture features list	2020-12-03 15:10:15 -07:00
ide
iio
infiniband
input	Input: document inhibiting	2020-12-02 22:10:37 -08:00
isdn
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	Changes for 5.11-rc1. Small cleanups/fixes mostly thanks to Marek,	2020-12-16 14:56:29 -08:00
litmus-tests
livepatch
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
mhi
mips	docs: archis: add a per-architecture features list	2020-12-03 15:10:15 -07:00
misc-devices
netlabel
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
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
pcmcia
power	PM: EM: Update Energy Model with new flag indicating power scale	2020-11-10 20:29:28 +01:00
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	Power management updates for 5.11-rc1	2020-12-15 16:30:31 -08:00
scsi
security
sh	docs: archis: add a per-architecture features list	2020-12-03 15:10:15 -07:00
sound	sound fixes for 5.11-rc4	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	Kbuild updates for v5.11	2020-12-22 14:02:39 -08:00
sphinx-static
spi
staging
target	tweewide: Fix most Shebang lines	2020-12-08 23:30:04 +09:00
timers
trace	Kbuild updates for v5.11	2020-12-22 14:02:39 -08:00
translations	Networking updates for 5.11	2020-12-15 13:22:29 -08:00
usb
userspace-api	"Intel SGX is new hardware functionality that can be used by	2020-12-14 13:14:57 -08:00
virt	KVM/arm64 fixes for 5.11, take #1	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	w1: w1_therm: Rename conflicting sysfs attribute 'eeprom' to 'eeprom_cmd'	2020-11-12 08:50:13 +01:00
watchdog
x86	A much quieter cycle for documentation (happily), with, one hopes, the bulk	2020-12-14 16:55:54 -08:00
xtensa	A much quieter cycle for documentation (happily), with, one hopes, the bulk	2020-12-14 16:55:54 -08:00
.gitignore
asm-annotations.rst
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py	docs: Note that sphinx 1.7 will be required soon	2020-12-11 13:53:38 -07:00
COPYING-logo
docutils.conf
dontdiff
index.rst	docs: archis: add a per-architecture features list	2020-12-03 15:10:15 -07:00
Kconfig
logo.gif
Makefile
memory-barriers.txt	docs/memory-barriers.txt: Fix a typo in CPU MEMORY BARRIERS section	2020-11-06 17:24:51 -08:00
SubmittingPatches
watch_queue.rst