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Paulo Alcantara 4ac0536f88 cifs: set a minimum of 120s for next dns resolution 
With commit 506c1da44f ("cifs: use the expiry output of dns_query to
schedule next resolution") and after triggering the first reconnect,
the next async dns resolution of tcp server's hostname would be
scheduled based on dns_resolver's key expiry default, which happens to
default to 5s on most systems that use key.dns_resolver for upcall.

As per key.dns_resolver.conf(5):

       default_ttl=<number>
              The  number  of  seconds  to  set  as the expiration on a cached
              record.  This will be overridden if the program manages  to  re-
              trieve  TTL  information along with the addresses (if, for exam-
              ple, it accesses the DNS directly).  The default is  5  seconds.
              The value must be in the range 1 to INT_MAX.

Make the next async dns resolution no shorter than 120s as we do not
want to be upcalling too often.

Cc: stable@vger.kernel.org
Fixes: 506c1da44f ("cifs: use the expiry output of dns_query to schedule next resolution")
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-09 23:03:08 -06:00
arch Xtensa updates for v5.16 2021-11-06 14:54:03 -07:00
block for-5.16/inode-sync-2021-10-29 2021-11-01 10:25:27 -07:00
certs
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2021-11-01 21:24:02 -07:00
Documentation \n 2021-11-06 16:43:20 -07:00
drivers s390 updates for the 5.16 merge window 2021-11-06 14:48:06 -07:00
fs cifs: set a minimum of 120s for next dns resolution 2021-11-09 23:03:08 -06:00
include \n 2021-11-06 16:43:20 -07:00
init Merge branch 'akpm' (patches from Andrew) 2021-11-06 14:08:17 -07:00
ipc
kernel \n 2021-11-06 16:43:20 -07:00
lib Merge branch 'akpm' (patches from Andrew) 2021-11-06 14:08:17 -07:00
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mm Merge branch 'akpm' (patches from Andrew) 2021-11-06 14:08:17 -07:00
net Merge branch 'akpm' (patches from Andrew) 2021-11-06 14:08:17 -07:00
samples \n 2021-11-06 16:43:20 -07:00
scripts Merge branch 'akpm' (patches from Andrew) 2021-11-06 14:08:17 -07:00
security Merge branch 'akpm' (patches from Andrew) 2021-11-06 14:08:17 -07:00
sound TTY / Serial driver update for 5.16-rc1 2021-11-04 09:09:37 -07:00
tools s390 updates for the 5.16 merge window 2021-11-06 14:48:06 -07:00
usr
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.mailmap ARM: SoC DT updates for v5.16 2021-11-03 16:56:03 -07:00
COPYING
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MAINTAINERS pci-v5.16-changes 2021-11-06 14:36:12 -07:00
Makefile Merge branch 'akpm' (patches from Andrew) 2021-11-06 14:08:17 -07:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.