github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-28 00:53:34 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

iomap: support ioends for direct reads

Browse Source 
Support using the ioend structure to defer I/O completion for direct
reads in addition to writes.  This requires a check for the operation
to not merge reads and writes in iomap_ioend_can_merge.  This support
will be used for bounce buffered direct I/O reads that need to copy
data back to the user address space on read completion.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Tested-by: Anuj Gupta <anuj20.g@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2026-01-26 06:53:44 +01:00 committed by Jens Axboe
parent c96b8b2202
commit d969bd72cf
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/iomap/ioend.c
View File

@ -299,6 +299,14 @@ EXPORT_SYMBOL_GPL(iomap_finish_ioends);
static bool iomap_ioend_can_merge(struct iomap_ioend *ioend,
struct iomap_ioend *next)
{
/*
* There is no point in merging reads as there is no completion
* processing that can be easily batched up for them.
*/
if (bio_op(&ioend->io_bio) == REQ_OP_READ ||
bio_op(&next->io_bio) == REQ_OP_READ)
return false;
if (ioend->io_bio.bi_status != next->io_bio.bi_status)
return false;
if (next->io_flags & IOMAP_IOEND_BOUNDARY)