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| author |   Kent Overstreet <kent.overstreet@gmail.com> | 2016-10-31 11:59:24 -0600 |
|---|---|---|
| committer |   Jens Axboe <axboe@fb.com> | 2016-11-02 10:50:18 -0600 |
| commit | 2cefe4dbaadf83b236caab46705b4b5a4958e3b6 (patch) | |
| tree | bee7e525f1145ad55b6abd02f97d10222ae90cc9 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | writeback: mark background writeback as such (diff) | |
| download | linux-dev-2cefe4dbaadf83b236caab46705b4b5a4958e3b6.tar.xz linux-dev-2cefe4dbaadf83b236caab46705b4b5a4958e3b6.zip | |
block: add bio_iov_iter_get_pages()
This is a helper that pins down a range from an iov_iter and adds it to
a bio without requiring a separate memory allocation for the page array.
It will be used for upcoming direct I/O implementations for block devices
and iomap based file systems.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
[hch: ported to the iov_iter interface, renamed and added comments.
All blame should be directed to me and all fame should go to Kent
after this!]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
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