ext4: improve smp scalability for inode generation

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->s_next_generation is protected by s_next_gen_lock but its usage
pattern is very primitive.  We don't actually need sequentially
increasing new generation numbers, so let's use prandom_u32() instead.

Reported-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

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This commit is contained in:

Theodore Ts'o 2017-11-08 22:23:20 -05:00

parent d77147ff44

commit 2325306802

4 changed files with 4 additions and 12 deletions

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2

fs/ext4/ext4.h

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4

fs/ext4/ialloc.c

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8

fs/ext4/ioctl.c

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2

fs/ext4/super.c

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