[RFC PATCH 0/7] mm: Make more use of readahead_control

David Howells
2020-09-01T16:28:29Z

Hi Willy,

Here's a set of patches to expand the use of the readahead_control struct,
essentially from do_sync_mmap_readahead() down. Note that I've been
passing the number of pages to read in rac->_nr_pages, and then saving it
and changing it certain points, e.g. page_cache_readahead_unbounded().

Also pass file_ra_state into force_page_cache_readahead().

Also there's an apparent minor bug in khugepaged.c that I've included a
patch for: page_cache_sync_readahead() looks to be given the wrong size in
collapse_file().

David
---
David Howells (7):
Fix khugepaged's request size in collapse_file()
mm: Make ondemand_readahead() take a readahead_control struct
mm: Push readahead_control down into force_page_cache_readahead()
mm: Pass readahead_control into page_cache_{sync,async}_readahead()
mm: Make __do_page_cache_readahead() use rac->_nr_pages
mm: Fold ra_submit() into do_sync_mmap_readahead()
mm: Pass a file_ra_state struct into force_page_cache_readahead()

fs/btrfs/free-space-cache.c | 7 +--
fs/btrfs/ioctl.c | 10 +++--
fs/btrfs/relocation.c | 14 +++---
fs/btrfs/send.c | 15 ++++---
fs/ext4/dir.c | 12 ++---
fs/ext4/verity.c | 8 ++--
fs/f2fs/dir.c | 10 +++--
fs/f2fs/verity.c | 8 ++--
include/linux/pagemap.h | 11 ++---
mm/fadvise.c | 6 ++-
mm/filemap.c | 33 +++++++-------
mm/internal.h | 16 +------
mm/khugepaged.c | 6 +--
mm/readahead.c | 89 ++++++++++++++++++-------------------
14 files changed, 127 insertions(+), 118 deletions(-)