Jason A. Donenfeld 534d2eaf19 random: schedule mix_interrupt_randomness() less often ... It used to be that mix_interrupt_randomness() would credit 1 bit each time it ran, and so add_interrupt_randomness() would schedule mix() to run every 64 interrupts, a fairly arbitrary number, but nonetheless considered to be a decent enough conservative estimate. Since e3e33fc2ea ("random: do not use input pool from hard IRQs"), mix() is now able to credit multiple bits, depending on the number of calls to add(). This was done for reasons separate from this commit, but it has the nice side effect of enabling this patch to schedule mix() less often. Currently the rules are: a) Credit 1 bit for every 64 calls to add(). b) Schedule mix() once a second that add() is called. c) Schedule mix() once every 64 calls to add(). Rules (a) and (c) no longer need to be coupled. It's still important to have _some_ value in (c), so that we don't "over-saturate" the fast pool, but the once per second we get from rule (b) is a plenty enough baseline. So, by increasing the 64 in rule (c) to something larger, we avoid calling queue_work_on() as frequently during irq storms. This commit changes that 64 in rule (c) to be 1024, which means we schedule mix() 16 times less often. And it does *not* need to change the 64 in rule (a). Fixes: 58340f8e95 ("random: defer fast pool mixing to worker") Cc: stable@vger.kernel.org Cc: Dominik Brodowski <linux@dominikbrodowski.net> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>		2022-06-19 23:50:45 +02:00
..
agp	x86/amd_nb: Unexport amd_cache_northbridges()	2022-04-05 19:22:27 +02:00
hw_random	virtio-rng: make device ready before making request	2022-06-08 08:56:03 -04:00
ipmi	ipmi:ipmb: Fix refcount leak in ipmi_ipmb_probe	2022-05-12 10:00:04 -05:00
mwave	char/mwave: Adjust io port register size	2021-12-03 14:27:06 +01:00
pcmcia	Char / Misc / Other smaller driver subsystem updates for 5.19-rc1	2022-06-03 11:36:34 -07:00
tpm	tpmdd updates for v5.19-rc1	2022-05-24 13:16:50 -07:00
xilinx_hwicap	xilinx_hwicap: cleanup comments	2022-02-25 12:08:57 +01:00
xillybus	char: xillybus: fix a refcount leak in cleanup_dev()	2022-04-24 17:30:45 +02:00
adi.c
apm-emulation.c
applicom.c	applicom: unneed to initialise statics to 0	2021-12-21 10:14:08 +01:00
applicom.h
bsr.c	powerpc/BSR: Make use of the helper macro LIST_HEAD()	2022-02-25 12:10:15 +01:00
ds1620.c
dsp56k.c
dtlk.c
hangcheck-timer.c
hpet.c	hpet: remove unused writeq/readq function definitions	2022-02-04 16:45:39 +01:00
Kconfig	random: credit cpu and bootloader seeds by default	2022-06-10 11:29:48 +02:00
lp.c	char: lp: remove redundant initialization of err	2022-06-10 15:29:50 +02:00
Makefile
mem.c	/dev/mem: make reads and writes interruptible	2022-04-24 17:31:01 +02:00
misc.c	char: misc: remove usage of list iterator past the loop body	2022-04-24 17:15:12 +02:00
mspec.c
nsc_gpio.c
nvram.c
nwbutton.c
nwbutton.h
nwflash.c
pc8736x_gpio.c
powernv-op-panel.c
ppdev.c
ps3flash.c
random.c	random: schedule mix_interrupt_randomness() less often	2022-06-19 23:50:45 +02:00
scx200_gpio.c
sonypi.c
tb0219.c
tlclk.c
toshiba.c
ttyprintk.c	char: ttyprintk: register console	2022-04-22 16:24:47 +02:00
uv_mmtimer.c
virtio_console.c	Char/Misc and other driver updates for 5.18-rc1	2022-03-28 12:27:35 -07:00