linux.git/mm/readahead.c, branch v3.11

mm: change invalidatepage prototype to accept length

2013-05-22T03:17:23+00:00

Currently there is no way to truncate partial page where the end
truncate point is not at the end of the page. This is because it was not
needed and the functionality was enough for file system truncate
operation to work properly. However more file systems now support punch
hole feature and it can benefit from mm supporting truncating page just
up to the certain point.

Specifically, with this functionality truncate_inode_pages_range() can
be changed so it supports truncating partial page at the end of the
range (currently it will BUG_ON() if 'end' is not at the end of the
page).

This commit changes the invalidatepage() address space operation
prototype to accept range to be invalidated and update all the instances
for it.

We also change the block_invalidatepage() in the same way and actually
make a use of the new length argument implementing range invalidation.

Actual file system implementations will follow except the file systems
where the changes are really simple and should not change the behaviour
in any way .Implementation for truncate_page_range() which will be able
to accept page unaligned ranges will follow as well.

Signed-off-by: Lukas Czerner 
Cc: Andrew Morton 
Cc: Hugh Dickins

teach SYSCALL_DEFINE how to deal with long long/unsigned long long

2013-03-04T03:46:22+00:00

... and convert a bunch of SYSCALL_DEFINE ones to SYSCALL_DEFINE,
killing the boilerplate crap around them.

Signed-off-by: Al Viro

switch simple cases of fget_light to fdget

2012-09-27T02:20:08+00:00

Signed-off-by: Al Viro

switch readahead(2) to fget_light()

2012-09-27T01:10:04+00:00

Signed-off-by: Al Viro

mm: move readahead syscall to mm/readahead.c

2012-05-29T23:22:23+00:00

It is better to define readahead(2) in mm/readahead.c than in
mm/filemap.c.

Signed-off-by: Cong Wang 
Cc: Fengguang Wu 
Cc: Al Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: Map most files to use export.h instead of module.h

2011-10-31T13:20:12+00:00

The files changed within are only using the EXPORT_SYMBOL
macro variants.  They are not using core modular infrastructure
and hence don't need module.h but only the export.h header.

Signed-off-by: Paul Gortmaker

readahead: readahead page allocations are OK to fail

2011-05-25T15:39:25+00:00

Pass __GFP_NORETRY|__GFP_NOWARN for readahead page allocations.

readahead page allocations are completely optional.  They are OK to fail
and in particular shall not trigger OOM on themselves.

Reported-by: Dave Young 
Reviewed-by: KOSAKI Motohiro 
Signed-off-by: Wu Fengguang 
Reviewed-by: Minchan Kim 
Reviewed-by: Pekka Enberg 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

read-ahead: use plugging

2011-03-10T07:52:26+00:00

Signed-off-by: Jens Axboe

block: remove per-queue plugging

2011-03-10T07:52:07+00:00

Code has been converted over to the new explicit on-stack plugging,
and delay users have been converted to use the new API for that.
So lets kill off the old plugging along with aops->sync_page().

Signed-off-by: Jens Axboe

readahead.c: fix comment

2010-05-25T15:07:00+00:00

Fix a wrong comment over page_cache_async_readahead().

Signed-off-by: Huang Shijie 
Acked-by: Wu Fengguang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds