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| author | Theodore Ts'o <tytso@mit.edu> | 2017-11-08 22:23:20 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2017-11-08 22:23:20 -0500 |
| commit | 232530680290ba94ca37852ab10d9556ea28badf (patch) | |
| tree | cf23ba2b6c563adc685f3b9fee830ac7d202546c /fs/ext4/super.c | |
| parent | d77147ff443b255d82c907a632c825b2cc610b10 (diff) | |
| download | linux-232530680290ba94ca37852ab10d9556ea28badf.tar.gz linux-232530680290ba94ca37852ab10d9556ea28badf.tar.bz2 linux-232530680290ba94ca37852ab10d9556ea28badf.zip | |
ext4: improve smp scalability for inode generation
->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>
Diffstat (limited to 'fs/ext4/super.c')
| -rw-r--r-- | fs/ext4/super.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 3a278faf5868..9f2e3eb5131f 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3982,8 +3982,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) } sbi->s_gdb_count = db_count; - get_random_bytes(&sbi->s_next_generation, sizeof(u32)); - spin_lock_init(&sbi->s_next_gen_lock); timer_setup(&sbi->s_err_report, print_daily_error_info, 0); |