From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx> Back in 2005, we merged a patch from Akamai that sped up /proc/$pid/maps by using f_version to stash the user virtual address that we'd just displayed. That wasn't necessary; we can just use the private *ppos for the same purpose. There have also been some other odd choices made over the years that use the seq_file infrastructure in some non-idiomatic ways. Tested by using 'dd' with various different 'bs=' parameters to check that calling ->start, ->stop and ->next at various offsets work as expected. Matthew Wilcox (Oracle) (5): proc: Inline vma_stop into m_stop proc: remove m_cache_vma proc: Use ppos instead of m->version seq_file: Remove m->version proc: Inline m_next_vma into m_next fs/proc/task_mmu.c | 95 +++++++++++++--------------------------- fs/seq_file.c | 28 ------------ include/linux/seq_file.h | 1 - 3 files changed, 31 insertions(+), 93 deletions(-) base-commit: d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 -- 2.25.0
