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SubjectRe: Strange performance change 59 -> 61/62
>> Some more stats ... which look rather suspicious. 600% increase for
>> dentry_open and __mark_inode_dirty? Hmmmmm.
> __mark_inode_dirty() just got itself an smp_mb(). Would be instructive to
> disable that.
> dentry_open(): don't know - fs/open.c hasn't changed at all. Perhaps
> dcache_rcu has caused additional pingpong?

2.5.59-mjb6 84 __mark_inode_dirty
2.5.61-mjb1 594 __mark_inode_dirty
2.5.61-mjb1-no_mb 74 __mark_inode_dirty

Yup, that fixed that one ... but presumably it was put there for a reason,
so I can't just rip it out ;-) Thanks, I'll go take a closer look at the


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