fs: lockless mntns rbtree lookup

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Currently we use a read-write lock but for the simple search case we can
make this lockless. Creating a new mount namespace is a rather rare
event compared with querying mounts in a foreign mount namespace. Once
this is picked up by e.g., systemd to list mounts in another mount in
it's isolated services or in containers this will be used a lot so this
seems worthwhile doing.

Link: https://lore.kernel.org/r/20241213-work-mount-rbtree-lockless-v3-3-6e3cdaf9b280@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

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Christian Brauner 2024-12-13 00:03:42 +01:00

parent 144acef333

commit 5dcbd85d35

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5

fs/mount.h

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116

fs/namespace.c

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