linux.git/fs/ceph/addr.c, branch v4.17

ceph: don't wait on writeback when there is no more dirty pages

2018-04-02T08:12:48+00:00

In sync mode, writepages() needs to write all dirty pages. But
it can only write dirty pages associated with the oldest snapc.
To write dirty pages associated with next snapc, it needs to wait
until current writes complete.

If there is no more dirty pages, writepages() should not wait on
writeback. Otherwise, dirty page writeback becomes very slow.

Signed-off-by: "Yan, Zheng" 
Signed-off-by: Ilya Dryomov

ceph: invalidate pages that beyond EOF in ceph_writepages_start()

2018-04-02T08:12:47+00:00

Dirty pages can be associated with different capsnap. Different capsnap
may have different EOF value. So invalidating dirty pages according to
the largest EOF value is wrong. Dirty pages beyond EOF, but associated
with other capsnap, do not get invalidated.

Signed-off-by: "Yan, Zheng" 
Signed-off-by: Ilya Dryomov

ceph: change variable name to follow common rule

2018-04-02T08:12:47+00:00

Variable name ci is mostly used for ceph_inode_info.
Variable name fi is mostly used for ceph_file_info.
Variable name cf is mostly used for ceph_cap_flush.

Change variable name to follow above common rules
in case of confusing.

Signed-off-by: Chengguang Xu 
Reviewed-by: "Yan, Zheng" 
Signed-off-by: Ilya Dryomov

libceph, ceph: move ceph_calc_file_object_mapping() to striper.c

2018-04-02T08:12:43+00:00

ceph_calc_file_object_mapping() has nothing to do with osdmaps.

Signed-off-by: Ilya Dryomov

libceph, ceph: change ceph_calc_file_object_mapping() signature

2018-04-02T08:12:38+00:00

- make it void
- xlen (object extent length) out parameter should be u32 because only
  a single stripe unit is mapped at a time

Signed-off-by: Ilya Dryomov 
Reviewed-by: Alex Elder

ceph: fix un-balanced fsc->writeback_count update

2018-01-29T17:36:09+00:00

Signed-off-by: "Yan, Zheng" 
Signed-off-by: Ilya Dryomov

ceph: track read contexts in ceph_file_info

2018-01-29T17:36:08+00:00

Previously ceph_read_iter() uses current->journal to pass context info
to ceph_readpages(), so that ceph_readpages() can distinguish read(2)
from readahead(2)/fadvise(2)/madvise(2). The problem is that page fault
can happen when copying data to userspace memory. Page fault may call
other filesystem's page_mkwrite() if the userspace memory is mapped to a
file. The later filesystem may also want to use current->journal.

The fix is define a on-stack data structure in ceph_read_iter(), add it
to context list in ceph_file_info. ceph_readpages() searches the list,
find if there is a context belongs to current thread.

Signed-off-by: "Yan, Zheng" 
Signed-off-by: Ilya Dryomov

mm, pagevec: remove cold parameter for pagevecs

2017-11-16T02:21:06+00:00

Every pagevec_init user claims the pages being released are hot even in
cases where it is unlikely the pages are hot.  As no one cares about the
hotness of pages being released to the allocator, just ditch the
parameter.

No performance impact is expected as the overhead is marginal.  The
parameter is removed simply because it is a bit stupid to have a useless
parameter copied everywhere.

Link: http://lkml.kernel.org/r/20171018075952.10627-6-mgorman@techsingularity.net
Signed-off-by: Mel Gorman 
Acked-by: Vlastimil Babka 
Cc: Andi Kleen 
Cc: Dave Chinner 
Cc: Dave Hansen 
Cc: Jan Kara 
Cc: Johannes Weiner 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: remove nr_pages argument from pagevec_lookup_{,range}_tag()

2017-11-16T02:21:04+00:00

All users of pagevec_lookup() and pagevec_lookup_range() now pass
PAGEVEC_SIZE as a desired number of pages.  Just drop the argument.

Link: http://lkml.kernel.org/r/20171009151359.31984-15-jack@suse.cz
Signed-off-by: Jan Kara 
Reviewed-by: Daniel Jordan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ceph: use pagevec_lookup_range_nr_tag()

2017-11-16T02:21:04+00:00

Use new function for looking up pages since nr_pages argument from
pagevec_lookup_range_tag() is going away.

Link: http://lkml.kernel.org/r/20171009151359.31984-14-jack@suse.cz
Signed-off-by: Jan Kara 
Reviewed-by: "Yan, Zheng" 
Reviewed-by: Daniel Jordan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds