linux/include
Jens Axboe 0c734c5ea7 block: improve struct request_queue layout
It's clearly been a while since someone looked at this, so I gave it a
quick shot. There are few issues in here:

- Random bundling of members that are mostly read-only and often written
- Random holes that need not be there

This moves the most frequently used bits into cacheline 1 and 2, with
the 2nd one being more write intensive than the first one, which is
basically read-only.

Outside of making this work a bit more efficiently, it also reduces the
size of struct request_queue for my test setup from 864 bytes (spanning
14 cachelines!) to 832 bytes and 13 cachelines.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/d2b7b61c-4868-45c0-9060-4f9c73de9d7e@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-12-15 07:34:51 -07:00
..
acpi ACPI: PM: Add acpi_device_fix_up_power_children() function 2023-11-20 17:31:49 +01:00
asm-generic asm-generic: qspinlock: fix queued_spin_value_unlocked() implementation 2023-11-22 09:32:49 -08:00
clocksource
crypto crypto: FIPS 202 SHA-3 register in hash info for IMA 2023-10-27 18:04:30 +08:00
drm drm next and fixes for 6.7-rc1 2023-11-07 17:10:02 -08:00
dt-bindings linux-watchdog 6.7-rc1 tag 2023-11-09 13:54:25 -08:00
keys
kunit
kvm KVM/arm64 updates for 6.7 2023-10-31 16:37:07 -04:00
linux block: improve struct request_queue layout 2023-12-15 07:34:51 -07:00
math-emu
media
memory
misc
net bpf, netkit: Add indirect call wrapper for fetching peer dev 2023-11-20 10:15:16 -08:00
pcmcia
ras
rdma
rv
scsi SCSI misc on 20231102 2023-11-02 15:13:50 -10:00
soc IOMMU Updates for Linux v6.7 2023-11-09 13:37:28 -08:00
sound ASoC: Updates for v6.7 2023-10-31 09:01:25 +01:00
target
trace rxrpc: Fix RTT determination to use any ACK as a source 2023-11-17 02:50:33 +00:00
uapi vfs-6.7-rc3.fixes 2023-11-24 09:45:40 -08:00
ufs
vdso
video fbdev: stifb: Make the STI next font pointer a 32-bit signed offset 2023-10-30 14:54:41 +01:00
xen xen/events: reduce externally visible helper functions 2023-11-14 09:29:28 +01:00