linux-kernel - [PATCH 0/3] vmalloc enhancements

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Message-Id: <20190225203037.1317-1-guro@fb.com>
Date:   Mon, 25 Feb 2019 12:30:34 -0800
From:   Roman Gushchin <guroan@...il.com>
To:     linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org, Matthew Wilcox <willy@...radead.org>,
        Johannes Weiner <hannes@...xchg.org>, kernel-team@...com,
        Roman Gushchin <guro@...com>
Subject: [PATCH 0/3] vmalloc enhancements

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) separates memory allocation and data initialization
  in alloc_vmap_area()
Patch (3) adds vmalloc counter to /proc/meminfo.

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 (3):
  mm: refactor __vunmap() to avoid duplicated call to find_vm_area()
  mm: separate memory allocation and actual work in alloc_vmap_area()
  mm: show number of vmalloc pages in /proc/meminfo

 fs/proc/meminfo.c       |   2 +-
 include/linux/vmalloc.h |   2 +
 mm/vmalloc.c            | 107 ++++++++++++++++++++++++++--------------
 3 files changed, 73 insertions(+), 38 deletions(-)

-- 
2.20.1