| Message ID | 87por9lufn.fsf@notabene.neil.brown.name (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
> On Jun 22, 2016, at 00:27, NeilBrown <neilb@suse.com> wrote: > > > > The total timeout for a "mount" attempt to an non-responsive server > will always be a multiple of time a single mount attempt in the kernel takes, > which for TCP defaults to about 4 minutes. > The documentation for the "retry" option seems to suggest that this can be used > to set a maximum but it really sets a time after which to stop retrying. > The total can be as much as "retry" plus the time for a single attempt. > > So clarify the documentation a bit, and also note that retrans > defaults are different for UDP and TCP: > #define NFS_DEF_UDP_RETRANS (3) > #define NFS_DEF_TCP_RETRANS (2) > > Reported-by: Howard Guo<hguo@suse.com> > Signed-off-by: NeilBrown <neilb@suse.com> > > diff --git a/utils/mount/nfs.man b/utils/mount/nfs.man > index e541cdc95cb1..fab24f898f64 100644 > --- a/utils/mount/nfs.man > +++ b/utils/mount/nfs.man > @@ -391,6 +391,13 @@ is 2 minutes, and the default value for background mounts is 10000 minutes > If a value of zero is specified, the > .BR mount (8) > command exits immediately after the first failure. > +.IP > +Note that the total timeout will always be a multiple of the time > +determined by the > +.BR timeo > +and > +.BR retrans > +options, which by default will be 30 minutes. How do we get to 30 minutes? -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" 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/utils/mount/nfs.man b/utils/mount/nfs.man index e541cdc95cb1..fab24f898f64 100644 --- a/utils/mount/nfs.man +++ b/utils/mount/nfs.man @@ -391,6 +391,13 @@ is 2 minutes, and the default value for background mounts is 10000 minutes If a value of zero is specified, the .BR mount (8) command exits immediately after the first failure. +.IP +Note that the total timeout will always be a multiple of the time +determined by the +.BR timeo +and +.BR retrans +options, which by default will be 30 minutes. .TP 1.5i .BI sec= flavors A colon-separated list of one or more security flavors to use for accessing
The total timeout for a "mount" attempt to an non-responsive server will always be a multiple of time a single mount attempt in the kernel takes, which for TCP defaults to about 4 minutes. The documentation for the "retry" option seems to suggest that this can be used to set a maximum but it really sets a time after which to stop retrying. The total can be as much as "retry" plus the time for a single attempt. So clarify the documentation a bit, and also note that retrans defaults are different for UDP and TCP: #define NFS_DEF_UDP_RETRANS (3) #define NFS_DEF_TCP_RETRANS (2) Reported-by: Howard Guo<hguo@suse.com> Signed-off-by: NeilBrown <neilb@suse.com>