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author | Miklos Szeredi <mszeredi@suse.cz> | 2007-10-18 03:07:05 -0700 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-18 14:37:31 -0700 |
commit | 0e9663ee452ffce0d429656ebbcfe69417a30e92 (patch) | |
tree | a72825f122c9e38d4adc42ebcfd127f366da4a0f /include/sound/gus.h | |
parent | f33321141b273d60cbb3a8f56a5489baad82ba5e (diff) |
fuse: add blksize field to fuse_attr
There are cases when the filesystem will be passed the buffer from a single
read or write call, namely:
1) in 'direct-io' mode (not O_DIRECT), read/write requests don't go
through the page cache, but go directly to the userspace fs
2) currently buffered writes are done with single page requests, but
if Nick's ->perform_write() patch goes it, it will be possible to
do larger write requests. But only if the original write() was
also bigger than a page.
In these cases the filesystem might want to give a hint to the app
about the optimal I/O size.
Allow the userspace filesystem to supply a blksize value to be returned by
stat() and friends. If the field is zero, it defaults to the old
PAGE_CACHE_SIZE value.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/sound/gus.h')
0 files changed, 0 insertions, 0 deletions