linux/include
Yu Zhao 4376807bf2 mm/mglru: reclaim offlined memcgs harder
In the effort to reduce zombie memcgs [1], it was discovered that the
memcg LRU doesn't apply enough pressure on offlined memcgs.  Specifically,
instead of rotating them to the tail of the current generation
(MEMCG_LRU_TAIL) for a second attempt, it moves them to the next
generation (MEMCG_LRU_YOUNG) after the first attempt.

Not applying enough pressure on offlined memcgs can cause them to build
up, and this can be particularly harmful to memory-constrained systems.

On Pixel 8 Pro, launching apps for 50 cycles:
                 Before  After  Change
  Zombie memcgs  45      35     -22%

[1] https://lore.kernel.org/CABdmKX2M6koq4Q0Cmp_-=wbP0Qa190HdEGGaHfxNS05gAkUtPA@mail.gmail.com/

Link: https://lkml.kernel.org/r/20231208061407.2125867-4-yuzhao@google.com
Fixes: e4dde56cd2 ("mm: multi-gen LRU: per-node lru_gen_folio lists")
Signed-off-by: Yu Zhao <yuzhao@google.com>
Reported-by: T.J. Mercier <tjmercier@google.com>
Tested-by: T.J. Mercier <tjmercier@google.com>
Cc: Charan Teja Kalla <quic_charante@quicinc.com>
Cc: Hillf Danton <hdanton@sina.com>
Cc: Jaroslav Pulchart <jaroslav.pulchart@gooddata.com>
Cc: Kairui Song <ryncsn@gmail.com>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-12-12 17:20:20 -08:00
..
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 amd-drm-fixes-6.7-2023-11-30: 2023-12-01 13:57:11 +10:00
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 mm/mglru: reclaim offlined memcgs harder 2023-12-12 17:20:20 -08:00
math-emu
media
memory
misc
net wireless fixes: 2023-11-29 19:43:34 -08:00
pcmcia
ras
rdma
rv
scsi scsi: sd: Fix system start for ATA devices 2023-11-24 20:44:21 -05:00
soc IOMMU Updates for Linux v6.7 2023-11-09 13:37:28 -08:00
sound ALSA: cs35l41: Fix for old systems which do not support command 2023-11-20 12:37:01 +01:00
target
trace rxrpc: Fix RTT determination to use any ACK as a source 2023-11-17 02:50:33 +00:00
uapi hardening fixes for v6.7-rc4 2023-12-01 14:17:54 +09:00
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