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de1fafab64
linux/drivers
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Coly Li de1fafab64 bcache: introduce meta_bucket_pages() related helper routines 
Currently the in-memory meta data like c->uuids or c->disk_buckets
are allocated by alloc_bucket_pages(). The macro alloc_bucket_pages()
calls __get_free_pages() to allocated continuous pages with order
indicated by ilog2(bucket_pages(c)),
 #define alloc_bucket_pages(gfp, c)                      \
     ((void *) __get_free_pages(__GFP_ZERO|gfp, ilog2(bucket_pages(c))))

The maximum order is defined as MAX_ORDER, the default value is 11 (and
can be overwritten by CONFIG_FORCE_MAX_ZONEORDER). In bcache code the
maximum bucket size width is 16bits, this is restricted both by KEY_SIZE
size and bucket_size size from struct cache_sb_disk. The maximum 16bits
width and power-of-2 value is (1<<15) in unit of sector (512byte). It
means the maximum value of bucket size in bytes is (1<<24) bytes a.k.a
4096 pages.

When the bucket size is set to maximum permitted value, ilog2(4096) is
12, which exceeds the default maximum order __get_free_pages() can
accepted, the failed pages allocation will fail cache set registration
procedure and print a kernel oops message for the exceeded pages order.

This patch introduces meta_bucket_pages(), meta_bucket_bytes(), and
alloc_bucket_pages() helper routines. meta_bucket_pages() indicates the
maximum pages can be allocated to meta data bucket, meta_bucket_bytes()
indicates the according maximum bytes, and alloc_bucket_pages() does
the pages allocation for meta bucket. Because meta_bucket_pages()
chooses the smaller value among the bucket size and MAX_ORDER_NR_PAGES,
it still works when MAX_ORDER overwritten by CONFIG_FORCE_MAX_ZONEORDER.

Following patches will use these helper routines to decide maximum pages
can be allocated for different meta data buckets. If the bucket size is
larger than meta_bucket_bytes(), the bcache registration can continue to
success, just the space more than meta_bucket_bytes() inside the bucket
is wasted. Comparing bcache failed for large bucket size, wasting some
space for meta data buckets is acceptable at this moment.

Signed-off-by: Coly Li <colyli@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-25 07:38:20 -06:00
..
accessibility treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
acpi Merge branch 'acpi-fan' 2020-07-03 16:15:31 +02:00
amba ARM: tegra: Replace zero-length array with flexible-array 2020-06-15 23:08:28 -05:00
android binder: fix null deref of proc->context 2020-06-23 07:54:46 +02:00
ata libata-5.8-2020-06-19 2020-06-19 13:09:40 -07:00
atm treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
auxdisplay treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
base Power management fixes for 5.8-rc3 2020-06-26 12:32:11 -07:00
bcma
block rsxx: switch from 'pci_free_consistent()' to 'dma_free_coherent()' 2020-07-11 09:27:09 -06:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
bus Fixes for omaps for v5.8 2020-06-28 14:41:55 +02:00
cdrom Merge branch 'work.sysctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-06-10 16:05:54 -07:00
char tpm_tis: Remove the HID IFX0102 2020-07-02 17:49:00 +03:00
clk clk: sifive: allocate sufficient memory for struct __prci_data 2020-06-25 15:04:13 -07:00
clocksource clocksource/drivers/timer-riscv: Use per-CPU timer interrupt 2020-06-09 19:11:22 -07:00
connector treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
counter
cpufreq cpufreq: intel_pstate: Add one more OOB control bit 2020-06-23 17:24:32 +02:00
cpuidle cpuidle: Rearrange s2idle-specific idle state entry code 2020-06-25 13:52:53 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-06-21 10:01:03 -07:00
dax block: remove the bd_queue field from struct block_device 2020-07-01 08:08:20 -06:00
dca
devfreq
dio maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault 2020-06-17 10:57:41 -07:00
dma dmaengine: tegra-apb: Replace zero-length array with flexible-array 2020-06-15 23:08:32 -05:00
dma-buf dma-buf: Move dma_buf_release() from fops to dentry_ops 2020-06-25 16:05:40 +05:30
edac EDAC/amd64: Read back the scrub rate PCI register on F15h 2020-06-18 20:25:25 +02:00
eisa treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
extcon
firewire firewire: ohci: Replace zero-length array with flexible-array 2020-06-15 23:08:31 -05:00
firmware ARM: SoC fixes for v5.8 2020-06-28 14:55:18 -07:00
fpga FPGA Manager fixes for 5.8-rc1 2020-06-26 17:26:31 +02:00
fsi treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
gnss treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
gpio treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
gpu * dma-buf: fix a use-after-free bug 2020-07-03 11:18:21 +10:00
greybus treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
hid treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
hsi treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
hv Drivers: hv: Change flag to write log level in panic msg to false 2020-06-29 10:30:35 +00:00
hwmon hwmon: (pmbus) fix a typo in Kconfig SENSORS_IR35221 option 2020-07-02 17:43:14 -07:00
hwspinlock
hwtracing stm class: Replace zero-length array with flexible-array 2020-06-15 23:08:32 -05:00
i2c i2c: mlxcpld: check correct size of maximum RECV_LEN packet 2020-07-04 08:20:38 +02:00
i3c
ide treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
idle
iio treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
infiniband IB/hfi1: Add atomic triggered sleep/wakeup 2020-06-24 16:13:38 -03:00
input maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault 2020-06-17 10:57:41 -07:00
interconnect More power management updates for 5.8-rc1 2020-06-10 14:04:39 -07:00
iommu iommu/vt-d: Fix misuse of iommu_domain_identity_map() 2020-06-23 10:08:32 +02:00
ipack treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
irqchip irqchip/gic: Atomically update affinity 2020-06-21 15:24:46 +01:00
isdn treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
leds LEDs pull request for 5.8-rc1. 2020-06-04 11:03:45 -07:00
lightnvm block: rename generic_make_request to submit_bio_noacct 2020-07-01 07:27:24 -06:00
macintosh treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
mailbox mailbox: qcom: Add ipq6018 apcs compatible 2020-06-10 22:43:57 -05:00
mcb
md bcache: introduce meta_bucket_pages() related helper routines 2020-07-25 07:38:20 -06:00
media media: omap3isp: remove cacheflush.h 2020-06-26 00:27:37 -07:00
memory
memstick
message scsi: mptfusion: Don't use GFP_ATOMIC for larger DMA allocations 2020-06-26 22:51:53 -04:00
mfd mfd: mt6360: Fix register driver NULL pointer by adding driver name 2020-06-16 09:32:43 +01:00
misc habanalabs: increase h/w timer when checking idle 2020-06-24 12:35:23 +03:00
mmc blk-mq: move failure injection out of blk_mq_complete_request 2020-06-24 09:15:57 -06:00
most
mtd This pull request contains a single change for UBI: 2020-06-10 13:24:40 -07:00
mux
net wil6210: account for napi_gro_receive never returning GRO_DROP 2020-06-25 16:16:21 -07:00
nfc treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
ntb NTB: perf: Fix race condition when run with ntb_test 2020-06-05 20:02:09 -04:00
nubus
nvdimm block: move ->make_request_fn to struct block_device_operations 2020-07-01 07:27:24 -06:00
nvme block: add max_active_zones to blk-sysfs 2020-07-15 14:26:11 -06:00
nvmem
of of: of_mdio: Correct loop scanning logic 2020-06-19 13:39:00 -07:00
opp treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
oprofile oprofile: Replace zero-length array with flexible-array 2020-06-15 23:08:32 -05:00
parisc
parport treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
pci Kbuild updates for v5.8 (2nd) 2020-06-13 13:29:16 -07:00
pcmcia treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
perf arm64 merge window fixes for -rc1 2020-06-11 12:53:23 -07:00
phy phy: samsung: Replace zero-length array with flexible-array 2020-06-15 23:08:32 -05:00
pinctrl pinctrl: single: fix function name in documentation 2020-06-20 22:41:32 +02:00
platform Kbuild updates for v5.8 (2nd) 2020-06-13 13:29:16 -07:00
pnp treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
power power supply and reset changes for the v5.8 series 2020-06-10 11:28:35 -07:00
powercap Kbuild updates for v5.8 (2nd) 2020-06-13 13:29:16 -07:00
pps treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
ps3
ptp treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
pwm pwm: Add missing "CONFIG_" prefix 2020-06-04 19:09:28 +02:00
rapidio rapidio: Replace zero-length array with flexible-array 2020-06-15 23:08:32 -05:00
ras
regulator regulator: mt6358: Remove BROKEN dependency 2020-06-17 13:01:19 +01:00
remoteproc remoteproc updates for v5.8 2020-06-08 13:01:08 -07:00
reset Char/Misc driver patches for 5.8-rc1 2020-06-07 10:59:32 -07:00
rpmsg remoteproc updates for v5.8 2020-06-08 13:01:08 -07:00
rtc RTC for 5.8 2020-06-07 16:11:23 -07:00
s390 s390/dasd: Use struct_size() helper 2020-07-15 08:47:11 -06:00
sbus treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
scsi block: add max_active_zones to blk-sysfs 2020-07-15 14:26:11 -06:00
sfi treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
sh
siox
slimbus
soc ARM: OMAP fixes for v5.8 2020-06-28 14:57:14 -07:00
soundwire
spi spi: Fixes for v5.8 2020-06-29 10:10:16 -07:00
spmi
ssb
staging Staging: rtl8723bs: prevent buffer overflow in update_sta_support_rate() 2020-06-16 21:25:38 +02:00
target Kbuild updates for v5.8 (2nd) 2020-06-13 13:29:16 -07:00
tc
tee mmap locking API: use coccinelle to convert mmap_sem rwsem call sites 2020-06-09 09:39:14 -07:00
thermal thermal/drivers/rcar_gen3: Fix undefined temperature if negative 2020-06-29 12:15:34 +02:00
thunderbolt USB/PHY driver updates for 5.8-rc1 2020-06-07 09:42:16 -07:00
tty Linux 5.8-rc4 2020-07-08 08:02:13 -06:00
uio
usb USB fixes for 5.8-rc3 2020-06-27 13:12:10 -07:00
vdpa vdpa: fix typos in the comments for __vdpa_alloc_device() 2020-06-22 12:34:21 -04:00
vfio vfio/pci: Fix SR-IOV VF handling with MMIO blocking 2020-06-25 11:04:23 -06:00
vhost tools/virtio: Add --reset 2020-06-22 12:34:21 -04:00
video Short summary of fixes pull (less than what git shortlog provides): 2020-06-26 13:49:17 +10:00
virt treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
virtio virtio-mem: add memory via add_memory_driver_managed() 2020-06-22 12:34:21 -04:00
visorbus treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
vlynq
vme treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
w1 w1: Replace zero-length array with flexible-array 2020-06-15 23:08:32 -05:00
watchdog treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
xen xen: branch for v5.8-rc4 2020-07-03 23:58:12 -07:00
zorro treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Kconfig
Makefile