diff mbox series

[2/6] fs: add kiocb alloc cache flag

Message ID 20210812154149.1061502-3-axboe@kernel.dk (mailing list archive)
State New, archived
Headers show
Series Enable bio recycling for polled IO | expand

Commit Message

Jens Axboe Aug. 12, 2021, 3:41 p.m. UTC 
If this kiocb can safely use the polled bio allocation cache, then this
flag must be set. Generally this can be set for polled IO, where we will
not see IRQ completions of the request.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 include/linux/fs.h | 2 ++
 1 file changed, 2 insertions(+)

Comments

Christoph Hellwig Aug. 12, 2021, 4:20 p.m. UTC | #1 
On Thu, Aug 12, 2021 at 09:41:45AM -0600, Jens Axboe wrote:
> If this kiocb can safely use the polled bio allocation cache, then this
> flag must be set. Generally this can be set for polled IO, where we will
> not see IRQ completions of the request.
> 
> Signed-off-by: Jens Axboe <axboe@kernel.dk>

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 640574294216..0dcc5de779c9 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -319,6 +319,8 @@  enum rw_hint {
 /* iocb->ki_waitq is valid */
 #define IOCB_WAITQ		(1 << 19)
 #define IOCB_NOIO		(1 << 20)
+/* can use bio alloc cache */
+#define IOCB_ALLOC_CACHE	(1 << 21)
 
 struct kiocb {
 	struct file		*ki_filp;