| Message ID | 20171110215410.9943-1-hch@lst.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 10 November 2017 at 22:54, Christoph Hellwig <hch@lst.de> wrote: > Signed-off-by: Christoph Hellwig <hch@lst.de> > --- Thanks, Christoph. (And thanks, Matthew, for the help.) Patch applied. Cheers, Michael > Changes since V1: > - better wording provided by Matthew Wilcox > > man2/readv.2 | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/man2/readv.2 b/man2/readv.2 > index 831cf6260..880435edf 100644 > --- a/man2/readv.2 > +++ b/man2/readv.2 > @@ -232,6 +232,25 @@ This flag is meaningful only for > .BR pwritev2 (), > and its effect applies only to the data range written by the system call. > .\" commit e864f39569f4092c2b2bc72c773b6e486c7e3bd9 > +.TP > +.BR RWF_NOWAIT " (since Linux 4.14)" > +Do not wait for data which is not immediately available. > +If this flag is specified the > +.BR preadv2 () > +system call will return instantly if it would have to read data from > +the backing storage or wait for a lock. > +If some data was successfully read, it will return the number of bytes read. > +If no bytes were read, it will return -1 and set > +.IR errno > +to > +.BR EAGAIN . > +This flag is meaningful only for > +.BR preadv2 () > +at the moment. > +.\" commit 3239d834847627b6634a4139cf1dc58f6f137a46 > +.\" commit 91f9943e1c7b6638f27312d03fe71fcc67b23571 > + > + > .SH RETURN VALUE > On success, > .BR readv (), > -- > 2.14.2 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-man" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/man2/readv.2 b/man2/readv.2 index 831cf6260..880435edf 100644 --- a/man2/readv.2 +++ b/man2/readv.2 @@ -232,6 +232,25 @@ This flag is meaningful only for .BR pwritev2 (), and its effect applies only to the data range written by the system call. .\" commit e864f39569f4092c2b2bc72c773b6e486c7e3bd9 +.TP +.BR RWF_NOWAIT " (since Linux 4.14)" +Do not wait for data which is not immediately available. +If this flag is specified the +.BR preadv2 () +system call will return instantly if it would have to read data from +the backing storage or wait for a lock. +If some data was successfully read, it will return the number of bytes read. +If no bytes were read, it will return -1 and set +.IR errno +to +.BR EAGAIN . +This flag is meaningful only for +.BR preadv2 () +at the moment. +.\" commit 3239d834847627b6634a4139cf1dc58f6f137a46 +.\" commit 91f9943e1c7b6638f27312d03fe71fcc67b23571 + + .SH RETURN VALUE On success, .BR readv (),
Signed-off-by: Christoph Hellwig <hch@lst.de> --- Changes since V1: - better wording provided by Matthew Wilcox man2/readv.2 | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)