Minchan Kim 243418e392 mm: fs: invalidate bh_lrus for only cold path ... The kernel test robot reported the regression of fio.write_iops[1] with commit 8cc621d2f4 ("mm: fs: invalidate BH LRU during page migration"). Since lru_add_drain is called frequently, invalidate bh_lrus there could increase bh_lrus cache miss ratio, which needs more IO in the end. This patch moves the bh_lrus invalidation from the hot path( e.g., zap_page_range, pagevec_release) to cold path(i.e., lru_add_drain_all, lru_cache_disable). Zhengjun Xing confirmed "I test the patch, the regression reduced to -2.9%" [1] https://lore.kernel.org/lkml/20210520083144.GD14190@xsang-OptiPlex-9020/ [2] 8cc621d2f4, mm: fs: invalidate BH LRU during page migration Link: https://lkml.kernel.org/r/20210907212347.1977686-1-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Reported-by: kernel test robot <oliver.sang@intel.com> Reviewed-by: Chris Goldsworthy <cgoldswo@codeaurora.org> Tested-by: "Xing, Zhengjun" <zhengjun.xing@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2021-09-24 16:13:35 -07:00
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acpi	Revert "ACPI: Add memory semantics to acpi_os_map_memory()"	2021-09-23 20:39:36 +02:00
asm-generic	pci_iounmap'2: Electric Boogaloo: try to make sense of it all	2021-09-19 17:13:35 -07:00
clocksource
crypto
drm
dt-bindings	linux-watchdog 5.15-rc1 tag	2021-09-07 13:52:46 -07:00
keys
kunit
kvm
linux	mm: fs: invalidate bh_lrus for only cold path	2021-09-24 16:13:35 -07:00
math-emu
media
memory
misc
net	net: dsa: tear down devlink port regions when tearing down the devlink port on error	2021-09-19 13:05:44 +01:00
pcmcia
ras
rdma
scsi
soc	Merge branches 'clk-nvidia', 'clk-rockchip', 'clk-at91' and 'clk-vc5' into clk-next	2021-09-01 15:26:58 -07:00
sound
target
trace	AFS fixes	2021-09-20 15:49:02 -07:00
uapi	5 smb3client fixes: two deferred close fixes (for bugs found with xfstests 478 and 461) and a deferred close improvement in rename, and two trivial fixes for incorrect Linux comment formatting pointed out by automated tools	2021-09-20 15:30:29 -07:00
vdso
video
xen