Re: [PATCHSET v5 0/12] Add support for async buffered reads

[Jens Axboe]

On 5/30/20 12:57 PM, Sedat Dilek wrote:
> Here are the numbers with your patchset:
> 
> # cat systemd-analyze-time_5.7.0-rc7-4-amd64-clang_2nd-try.txt
> Startup finished in 7.229s (kernel) + 1min 18.304s (userspace) = 1min 25.534s
> graphical.target reached after 1min 18.286s in userspace

Can you see if this makes a difference?

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index c296463c15eb..ccb895f911b1 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -374,8 +374,7 @@ enum req_flag_bits {
 #define REQ_INTEGRITY		(1ULL << __REQ_INTEGRITY)
 #define REQ_FUA			(1ULL << __REQ_FUA)
 #define REQ_PREFLUSH		(1ULL << __REQ_PREFLUSH)
-#define REQ_RAHEAD		\
-	((1ULL << __REQ_RAHEAD) | (1ULL << __REQ_NOWAIT))
+#define REQ_RAHEAD		(1ULL << __REQ_RAHEAD)
 #define REQ_BACKGROUND		(1ULL << __REQ_BACKGROUND)
 #define REQ_NOWAIT		(1ULL << __REQ_NOWAIT)
 #define REQ_CGROUP_PUNT		(1ULL << __REQ_CGROUP_PUNT)

-- 
Jens Axboe