search for: dio_iodone_t

...iles changed, 36 insertions(+), 8 deletions(-) diff --git a/fs/direct-io.c b/fs/direct-io.c index e82adc2..21ec032 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -82,6 +82,8 @@ struct dio { int reap_counter; /* rate limit reaping */ get_block_t *get_block; /* block mapping function */ dio_iodone_t *end_io; /* IO completion function */ + dio_submit_t *submit_io; /* IO submition function */ + loff_t logical_offset_in_bio; /* current first logical block in bio */ sector_t final_block_in_bio; /* current final block in bio + 1 */ sector_t next_block_for_io; /* next block to be put under IO,...

V1->V2: Check to see if our current ppos is >= i_size after a short DIO read, just in case it was actually a short read and we need to just return. This is similar to what already happens in the write case. If we have a short read while doing O_DIRECT, instead of just returning, fallthrough and try to read the rest via buffered IO. BTRFS needs this because if we encounter a compressed or

...ge */ unsigned first_block_in_page; /* doesn''t change, Used only once */ int boundary; /* prev block is at a boundary */ + int separate_meta_reads; /* separate in I/O submission */ int reap_counter; /* rate limit reaping */ get_block_t *get_block; /* block mapping function */ dio_iodone_t *end_io; /* IO completion function */ @@ -659,7 +661,7 @@ static int dio_send_cur_page(struct dio *dio) * Submit now if the underlying fs is about to perform a * metadata read */ - else if (dio->boundary) + else if (dio->separate_meta_reads && dio->boundary) dio...

i_alloc_sem has always been a bit of an odd "lock". It''s the only remaining rw_semaphore that can be released by a different thread than the one that locked it, and it''s use case in the core direct I/O code is more like a counter given that the writers already have external serialization. This series removes it in favour of a simpler counter scheme, thus getting rid