| Message ID | 1476969135-32732-4-git-send-email-hch@lst.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Oct 20, 2016 at 8:12 AM, Christoph Hellwig <hch@lst.de> wrote: > The information that am I/O is a read-ahead can be useful for drivers. > In fact the NVMe driver already checks it, even if it won't ever be set > at the moment. > > Signed-off-by: Christoph Hellwig <hch@lst.de> > --- > include/linux/blk_types.h | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h > index b541425..44f9bca 100644 > --- a/include/linux/blk_types.h > +++ b/include/linux/blk_types.h > @@ -163,9 +163,9 @@ enum rq_flag_bits { > __REQ_INTEGRITY, /* I/O includes block integrity payload */ > __REQ_FUA, /* forced unit access */ > __REQ_PREFLUSH, /* request for cache flush */ > + __REQ_RAHEAD, /* read ahead, can fail anytime */ > > /* bio only flags */ > - __REQ_RAHEAD, /* read ahead, can fail anytime */ > __REQ_THROTTLED, /* This bio has already been subjected to > * throttling rules. Don't do it again. */ > > @@ -205,7 +205,7 @@ enum rq_flag_bits { > (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER) > #define REQ_COMMON_MASK \ > (REQ_FAILFAST_MASK | REQ_SYNC | REQ_META | REQ_PRIO | REQ_NOIDLE | \ > - REQ_PREFLUSH | REQ_FUA | REQ_INTEGRITY | REQ_NOMERGE) > + REQ_PREFLUSH | REQ_FUA | REQ_INTEGRITY | REQ_NOMERGE | REQ_RAHEAD) > #define REQ_CLONE_MASK REQ_COMMON_MASK > > /* This mask is used for both bio and request merge checking */ > -- > 2.1.4 Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com> > > -- > To unsubscribe from this list: send the line "unsubscribe linux-block" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at https://urldefense.proofpoint.com/v2/url?u=http-3A__vger.kernel.org_majordomo-2Dinfo.html&d=DQIBAg&c=IGDlg0lD0b-nebmJJ0Kp8A&r=Wg5NqlNlVTT7Ugl8V50qIHLe856QW0qfG3WVYGOrWzA&m=XkkC-0hl62SE88NTIGyxf05FrIFOVR74KhU2MfZe7RU&s=6Clviz-d2h1fRYEApTAKfnBboE81JScmM43jCtDQeMU&e=
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index b541425..44f9bca 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -163,9 +163,9 @@ enum rq_flag_bits { __REQ_INTEGRITY, /* I/O includes block integrity payload */ __REQ_FUA, /* forced unit access */ __REQ_PREFLUSH, /* request for cache flush */ + __REQ_RAHEAD, /* read ahead, can fail anytime */ /* bio only flags */ - __REQ_RAHEAD, /* read ahead, can fail anytime */ __REQ_THROTTLED, /* This bio has already been subjected to * throttling rules. Don't do it again. */ @@ -205,7 +205,7 @@ enum rq_flag_bits { (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER) #define REQ_COMMON_MASK \ (REQ_FAILFAST_MASK | REQ_SYNC | REQ_META | REQ_PRIO | REQ_NOIDLE | \ - REQ_PREFLUSH | REQ_FUA | REQ_INTEGRITY | REQ_NOMERGE) + REQ_PREFLUSH | REQ_FUA | REQ_INTEGRITY | REQ_NOMERGE | REQ_RAHEAD) #define REQ_CLONE_MASK REQ_COMMON_MASK /* This mask is used for both bio and request merge checking */
The information that am I/O is a read-ahead can be useful for drivers. In fact the NVMe driver already checks it, even if it won't ever be set at the moment. Signed-off-by: Christoph Hellwig <hch@lst.de> --- include/linux/blk_types.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)