diff mbox series

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

Message ID 20210811193533.766613-3-axboe@kernel.dk (mailing list archive)
State New, archived
Headers show
Series Enable bio recycling for polled IO | expand

Commit Message

Jens Axboe Aug. 11, 2021, 7:35 p.m. UTC 
If this kiocb can safely use the polled bio allocation cache, then this
flag must be set.

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

Comments

Christoph Hellwig Aug. 12, 2021, 6:54 a.m. UTC | #1 
On Wed, Aug 11, 2021 at 01:35:29PM -0600, Jens Axboe wrote:
> If this kiocb can safely use the polled bio allocation cache, then this
> flag must be set.

Looks fine, but it might be worth to define the semantics a little bit
better.
Jens Axboe Aug. 12, 2021, 2:52 p.m. UTC | #2 
On 8/12/21 12:54 AM, Christoph Hellwig wrote:
> On Wed, Aug 11, 2021 at 01:35:29PM -0600, Jens Axboe wrote:
>> If this kiocb can safely use the polled bio allocation cache, then this
>> flag must be set.
> 
> Looks fine, but it might be worth to define the semantics a little bit
> better.

Sure, I'll expand that explanation a bit.
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;