Jan Kara 730633f0b7 mm: Protect operations adding pages to page cache with invalidate_lock ... Currently, serializing operations such as page fault, read, or readahead against hole punching is rather difficult. The basic race scheme is like: fallocate(FALLOC_FL_PUNCH_HOLE) read / fault / .. truncate_inode_pages_range() <create pages in page cache here> <update fs block mapping and free blocks> Now the problem is in this way read / page fault / readahead can instantiate pages in page cache with potentially stale data (if blocks get quickly reused). Avoiding this race is not simple - page locks do not work because we want to make sure there are *no* pages in given range. inode->i_rwsem does not work because page fault happens under mmap_sem which ranks below inode->i_rwsem. Also using it for reads makes the performance for mixed read-write workloads suffer. So create a new rw_semaphore in the address_space - invalidate_lock - that protects adding of pages to page cache for page faults / reads / readahead. Reviewed-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>		2021-07-13 13:14:27 +02:00
..
ABI	f2fs-for-5.14-rc1	2021-07-09 09:37:56 -07:00
accounting	delayacct: Add sysctl to enable at runtime	2021-05-12 11:43:25 +02:00
admin-guide	USB / Thunderbolt patches for 5.14-rc1	2021-07-05 14:16:22 -07:00
arm	docs: Fix typo in Documentation/arm/marvell.rst	2021-06-04 11:28:36 -06:00
arm64	arm64: Document requirement for access to FEAT_HCX	2021-05-25 19:05:28 +01:00
block	for-5.14/block-2021-06-29	2021-06-30 12:12:56 -07:00
bpf	Networking changes for 5.14.	2021-06-30 15:51:09 -07:00
cdrom	docs: cdrom-standard.rst: get rid of uneeded UTF-8 chars	2021-05-11 11:00:17 -06:00
core-api	module: add printk formats to add module build ID to stacktraces	2021-07-08 11:48:22 -07:00
cpu-freq	cpufreq: Remove ->resolve_freq()	2021-06-30 19:45:42 +02:00
crypto
dev-tools	Merge branch 'kcsan.2021.05.18a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu	2021-07-04 12:29:16 -07:00
devicetree	RTC for 5.14	2021-07-10 16:19:10 -07:00
doc-guide	docs: doc-guide: avoid using ReST :doc:foo markup	2021-06-17 13:24:37 -06:00
driver-api	pwm: Changes for v5.14-rc1	2021-07-08 12:18:04 -07:00
fault-injection	docs: fault-injection: fix non-working usage of negative values	2021-06-14 15:58:22 -06:00
fb
features	powerpc updates for 5.13	2021-04-30 12:22:28 -07:00
filesystems	mm: Protect operations adding pages to page cache with invalidate_lock	2021-07-13 13:14:27 +02:00
firmware_class
firmware-guide	pwm: Changes for v5.14-rc1	2021-07-08 12:18:04 -07:00
fpga	Documentation: fpga: dfl: change FPGA indirect article to an	2021-06-09 14:51:25 +02:00
gpu	drm/amd/display: Add Freesync video documentation	2021-06-18 17:06:43 -04:00
hid
hwmon	hwmon: (pmbus) Add driver for Delta DPS-920AB PSU	2021-06-17 04:21:46 -07:00
i2c	Merge branch 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2021-07-04 11:47:18 -07:00
ia64
ide
iio
infiniband
input	docs: networking: Replace strncpy() with strscpy()	2021-06-04 11:21:43 -06:00
isdn
kbuild	Kconfig updates for v5.13	2021-04-29 14:32:00 -07:00
kernel-hacking	docs: kernel-hacking: hacking.rst: avoid using ReST :doc:foo markup	2021-06-17 13:24:38 -06:00
leds
litmus-tests
livepatch
locking	locking/lockdep,doc: Improve readability of the block matrix	2021-05-31 10:14:54 +02:00
m68k
maintainer
mhi
mips
misc-devices
netlabel
networking	TTY / Serial patches for 5.14-rc1	2021-07-05 14:08:24 -07:00
nios2
nvdimm
openrisc
parisc
PCI	pci-v5.14-changes	2021-07-08 12:06:20 -07:00
pcmcia
power	PM: runtime: Clarify documentation when callbacks are unassigned	2021-06-11 19:04:07 +02:00
powerpc	powerpc/64s/syscall: Use pt_regs.trap to distinguish syscall ABI difference between sc and scv syscalls	2021-05-21 00:58:03 +10:00
process	docs: process: submitting-patches.rst: avoid using ReST :doc:foo markup	2021-06-17 13:24:38 -06:00
RCU	Merge branch 'core-rcu-2021.07.04' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu	2021-07-04 12:58:33 -07:00
riscv	riscv: Ensure BPF_JIT_REGION_START aligned with PMD size	2021-06-18 21:10:05 -07:00
s390	vfio/mdev: Remove CONFIG_VFIO_MDEV_DEVICE	2021-06-21 15:29:25 -06:00
scheduler	This was a reasonably active cycle for documentation; this pull includes:	2021-06-28 16:53:05 -07:00
scsi	scsi: core: Kill message byte	2021-05-31 22:48:24 -04:00
security	This was a reasonably active cycle for documentation; this pull includes:	2021-06-28 16:53:05 -07:00
sh
sound	ASoC: Updates for v5.14	2021-07-01 08:36:12 +02:00
sparc
sphinx
sphinx-static
spi	spi: pxa2xx: Update documentation to point out that it's outdated	2021-05-18 14:05:36 +01:00
staging
target
timers	Documentation: drop optional BOMs	2021-05-10 15:17:34 -06:00
trace	Tracing updates for 5.14:	2021-07-03 11:13:22 -07:00
translations	cpufreq: Remove ->resolve_freq()	2021-06-30 19:45:42 +02:00
usb	USB / Thunderbolt patches for 5.14-rc1	2021-07-05 14:16:22 -07:00
userspace-api	Char / Misc driver updates for 5.14-rc1	2021-07-05 13:42:16 -07:00
virt	This was a reasonably active cycle for documentation; this pull includes:	2021-06-28 16:53:05 -07:00
vm	Merge branch 'akpm' (patches from Andrew)	2021-07-02 12:08:10 -07:00
w1	w1: fix build warning in w1_ds2438.rst	2021-05-26 09:11:24 +02:00
watchdog
x86	Fixes and improvements for FPU handling on x86:	2021-07-07 11:12:01 -07:00
xtensa
.gitignore
arch.rst
asm-annotations.rst
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py	docs: Take a little noise out of the build process	2021-06-17 13:49:18 -06:00
COPYING-logo
docutils.conf
dontdiff
index.rst
Kconfig
logo.gif
Makefile	docs: Makefile: Use CONFIG_SHELL not SHELL	2021-06-18 11:26:08 -06:00
memory-barriers.txt
SubmittingPatches
watch_queue.rst