[RFC,0/4] vmalloc enhancements

Message

Roman Gushchin Dec. 14, 2018, 6:07 p.m. UTC

The patchset contains few changes to the vmalloc code, which are
leading to some performance gains and code simplification.

Also, it exports a number of pages, used by vmalloc(),
in /proc/meminfo.

Patch (1) removes some redundancy on __vunmap().
Patch (2) is a preparation for patch (3).
Patch (3) merges independent 3 metadata allocations into one.
Patch (4) adds vmalloc counter to /proc/meminfo.

Roman Gushchin (4):
  mm: refactor __vunmap() to avoid duplicated call to find_vm_area()
  mm: separate memory allocation and actual work in alloc_vmap_area()
  mm: allocate vmalloc metadata in one allocation
  mm: show number of vmalloc pages in /proc/meminfo

 arch/mips/mm/ioremap.c      |   7 +-
 arch/nios2/mm/ioremap.c     |   4 +-
 arch/sh/kernel/cpu/sh4/sq.c |   5 +-
 arch/sh/mm/ioremap.c        |   8 +-
 arch/x86/mm/ioremap.c       |   4 +-
 fs/proc/meminfo.c           |   2 +-
 include/linux/vmalloc.h     |   6 +-
 mm/vmalloc.c                | 206 ++++++++++++++++++++++--------------
 8 files changed, 140 insertions(+), 102 deletions(-)