Amir Goldstein f9a48bc3dd fsnotify: clear PARENT_WATCHED flags lazily ... [ Upstream commit 172e422ffe ] In some setups directories can have many (usually negative) dentries. Hence __fsnotify_update_child_dentry_flags() function can take a significant amount of time. Since the bulk of this function happens under inode->i_lock this causes a significant contention on the lock when we remove the watch from the directory as the __fsnotify_update_child_dentry_flags() call from fsnotify_recalc_mask() races with __fsnotify_update_child_dentry_flags() calls from __fsnotify_parent() happening on children. This can lead upto softlockup reports reported by users. Fix the problem by calling fsnotify_update_children_dentry_flags() to set PARENT_WATCHED flags only when parent starts watching children. When parent stops watching children, clear false positive PARENT_WATCHED flags lazily in __fsnotify_parent() for each accessed child. Suggested-by: Jan Kara <jack@suse.cz> Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Stephen Brennan <stephen.s.brennan@oracle.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-09-12 11:07:41 +02:00
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acpi
asm-generic	vmlinux.lds.h: catch .bss..L* sections into BSS")	2024-08-19 05:44:54 +02:00
clocksource
crypto	crypto: af_alg - Disallow multiple in-flight AIO requests	2024-01-25 14:52:34 -08:00
drm	drm/mipi-dsi: use correct return type for the DSC functions	2024-06-16 13:39:30 +02:00
dt-bindings	dt-bindings: clocks: imx8mp: Add ID for usb suspend clock	2024-03-01 13:21:53 +01:00
keys
kunit
kvm	KVM: arm64: vgic-v4: Make the doorbell request robust w.r.t preemption	2024-07-05 09:14:51 +02:00
linux	fsnotify: clear PARENT_WATCHED flags lazily	2024-09-12 11:07:41 +02:00
math-emu
media	media: cec: core: add adap_nb_transmit_canceled() callback	2024-06-16 13:39:53 +02:00
memory
misc
net	net: busy-poll: use ktime_get_ns() instead of local_clock()	2024-09-04 13:23:40 +02:00
pcmcia
ras
rdma	RDMA/core: Fix umem iterator when PAGE_SIZE is greater then HCA pgsz	2023-12-13 18:36:40 +01:00
scsi	scsi: core: Fix the return value of scsi_logical_block_count()	2024-09-04 13:23:35 +02:00
soc	soc: qcom: rpmh-rsc: Enhance check for VRM in-flight request	2024-06-16 13:39:55 +02:00
sound	ALSA: dmaengine: Synchronize dma channel after drop()	2024-07-27 10:46:11 +02:00
target
trace	mptcp: sched: check both directions for backup	2024-08-19 05:45:47 +02:00
uapi	m68k: amiga: Turn off Warp1260 interrupts during boot	2024-08-19 05:45:13 +02:00
vdso
video
xen