Messages in this thread | | | From | Tejun Heo <> | Subject | [PATCHSET] FUSE: implement direct mmap, take#2 | Date | Tue, 14 Apr 2009 11:04:17 +0900 |
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Hello, Miklos, Nick, Andrew.
This is the second take of fuse-implement-direct-mmap patchset. This patchset implements direct mmap support for FUSE (and CUSE). Each direct mmap area is backed by anonymous mapping (shmem_file) and the FUSE server can decide how they are shared.
mmap request is handled in two steps. MMAP first queries the server whether it wants to share the mapping with an existing one or create a new one, and if so, with which flags. MMAP_COMMIT notifies the server the result of mmap and if successful the fd the server can use to access the mmap region.
Changes from the last take[L] are
* 0003-FUSE-don-t-let-fuse_req-end-put-the-base-referen.patch was merged and thus dropped from this series.
* Updated to the current master + implement-cuse, take#3.
This patchset contains the following patches.
0001-mmap-don-t-assume-f_op-mmap-doesn-t-change-vma.patch 0002-fdtable-export-alloc_fd.patch 0003-FUSE-make-request_wait_answer-wait-for-end-co.patch 0004-FUSE-implement-fuse_req-prep.patch 0005-FUSE-implement-direct-mmap.patch
0001-0002 update mm and fdtable for following FUSE changes. 0003-0004 update fuse_req->end() handling and add ->prep(). 0005 implements direct mmap.
Nick, Andrew, can you guys please review and ack 0001-0002?
This patchset is on top of
linus#master(80a04d3f2f94fb68b5df05e3ac6697130bc3467a) + [1] implement-cuse patchset, take#3
and is available in the following git tree.
git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git fuse-mmap
diffstat follows.
fs/file.c | 1 fs/fuse/cuse.c | 1 fs/fuse/dev.c | 70 ++++++-- fs/fuse/file.c | 424 +++++++++++++++++++++++++++++++++++++++++++++++++-- fs/fuse/fuse_i.h | 19 ++ include/linux/fuse.h | 47 +++++ mm/mmap.c | 1 7 files changed, 533 insertions(+), 30 deletions(-)
Thanks.
-- tejun
[L] http://thread.gmane.org/gmane.comp.file-systems.fuse.devel/7212 [1] http://thread.gmane.org/gmane.comp.file-systems.fuse.devel/7705
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