[v4,0/2] vmalloc enhancements

Message

Roman Gushchin April 17, 2019, 7:40 p.m. UTC

The patchset removes a redundant operation in __vunmap()
and exports a number of pages, used by vmalloc(),
in /proc/meminfo.

Patch (1) removes some redundancy on __vunmap().
Patch (2) adds vmalloc counter to /proc/meminfo.

v4->v3:
  - rebased on top of current mm tree
  - dropped alloc_vmap_area() refactoring

v3->v2:
  - switched back to atomic after more accurate perf measurements:
  no visible perf difference
  - added perf stacktraces in commmit message of (1)

v2->v1:
  - rebased on top of current mm tree
  - switch from atomic to percpu vmalloc page counter

RFC->v1:
  - removed bogus empty lines (suggested by Matthew Wilcox)
  - made nr_vmalloc_pages static (suggested by Matthew Wilcox)
  - dropped patch 3 from RFC patchset, will post later with
  some other changes
  - dropped RFC


Roman Gushchin (2):
  mm: refactor __vunmap() to avoid duplicated call to find_vm_area()
  mm: show number of vmalloc pages in /proc/meminfo

 fs/proc/meminfo.c       |  2 +-
 include/linux/vmalloc.h |  2 ++
 mm/vmalloc.c            | 57 ++++++++++++++++++++++++++---------------
 3 files changed, 40 insertions(+), 21 deletions(-)