lkml.org 
[lkml]   [2013]   [Mar]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCHv2, RFC 00/30] Transparent huge page cache
Hi Kirill,
On 03/15/2013 01:50 AM, Kirill A. Shutemov wrote:
> From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
>
> Here's the second version of the patchset.
>
> The intend of the work is get code ready to enable transparent huge page
> cache for the most simple fs -- ramfs.
>
> We have read()/write()/mmap() functionality now. Still plenty work ahead.

One offline question.

Why set PG_mlocked to page_tail which be splited in function
__split_huge_page_refcount?

>
> Any feedback is welcome.
>
> Changes since v1:
> - mmap();
> - fix add_to_page_cache_locked() and delete_from_page_cache();
> - introduce mapping_can_have_hugepages();
> - call split_huge_page() only for head page in filemap_fault();
> - wait_split_huge_page(): serialize over i_mmap_mutex too;
> - lru_add_page_tail: avoid PageUnevictable on active/inactive lru lists;
> - fix off-by-one in zero_huge_user_segment();
> - THP_WRITE_ALLOC/THP_WRITE_FAILED counters;
>
> TODO:
> - memcg accounting has not yet evaluated;
> - collapse;
> - migration (?);
> - stats, knobs, etc.;
> - tmpfs/shmem enabling;
>
>
> Kirill A. Shutemov (30):
> block: implement add_bdi_stat()
> mm: implement zero_huge_user_segment and friends
> mm: drop actor argument of do_generic_file_read()
> radix-tree: implement preload for multiple contiguous elements
> thp, mm: avoid PageUnevictable on active/inactive lru lists
> thp, mm: basic defines for transparent huge page cache
> thp, mm: introduce mapping_can_have_hugepages() predicate
> thp, mm: rewrite add_to_page_cache_locked() to support huge pages
> thp, mm: rewrite delete_from_page_cache() to support huge pages
> thp, mm: locking tail page is a bug
> thp, mm: handle tail pages in page_cache_get_speculative()
> thp, mm: add event counters for huge page alloc on write to a file
> thp, mm: implement grab_cache_huge_page_write_begin()
> thp, mm: naive support of thp in generic read/write routines
> thp, libfs: initial support of thp in
> simple_read/write_begin/write_end
> thp: handle file pages in split_huge_page()
> thp: wait_split_huge_page(): serialize over i_mmap_mutex too
> thp, mm: truncate support for transparent huge page cache
> thp, mm: split huge page on mmap file page
> ramfs: enable transparent huge page cache
> x86-64, mm: proper alignment mappings with hugepages
> mm: add huge_fault() callback to vm_operations_struct
> thp: prepare zap_huge_pmd() to uncharge file pages
> thp: move maybe_pmd_mkwrite() out of mk_huge_pmd()
> thp, mm: basic huge_fault implementation for generic_file_vm_ops
> thp: extract fallback path from do_huge_pmd_anonymous_page() to a
> function
> thp: initial implementation of do_huge_linear_fault()
> thp: handle write-protect exception to file-backed huge pages
> thp: call __vma_adjust_trans_huge() for file-backed VMA
> thp: map file-backed huge pages on fault
>
> arch/x86/kernel/sys_x86_64.c | 13 +-
> fs/libfs.c | 50 ++++-
> fs/ramfs/inode.c | 6 +-
> include/linux/backing-dev.h | 10 +
> include/linux/huge_mm.h | 36 +++-
> include/linux/mm.h | 16 ++
> include/linux/pagemap.h | 24 ++-
> include/linux/radix-tree.h | 3 +
> include/linux/vm_event_item.h | 2 +
> lib/radix-tree.c | 32 ++-
> mm/filemap.c | 283 +++++++++++++++++++++----
> mm/huge_memory.c | 462 ++++++++++++++++++++++++++++++++++-------
> mm/memory.c | 31 ++-
> mm/swap.c | 3 +-
> mm/truncate.c | 12 ++
> mm/vmstat.c | 2 +
> 16 files changed, 842 insertions(+), 143 deletions(-)
>



\
 
 \ /
  Last update: 2013-03-18 05:41    [W:0.607 / U:0.400 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site