linux/fs/autofs4
Ian Kent 43694d4bf8 autofs: revert "autofs: take more care to not update last_used on path walk"
While commit 092a53452b ("autofs: take more care to not update
last_used on path walk") helped (partially) resolve a problem where
automounts were not expiring due to aggressive accesses from user space
it has a side effect for very large environments.

This change helps with the expire problem by making the expire more
aggressive but, for very large environments, that means more mount
requests from clients.  When there are a lot of clients that can mean
fairly significant server load increases.

It turns out I put the last_used in this position to solve this very
problem and failed to update my own thinking of the autofs expire
policy.  So the patch being reverted introduces a regression which
should be fixed.

Link: http://lkml.kernel.org/r/151174729420.6162.1832622523537052460.stgit@pluto.themaw.net
Fixes: 092a53452b ("autofs: take more care to not update last_used on path walk")
Signed-off-by: Ian Kent <raven@themaw.net>
Reviewed-by: NeilBrown <neilb@suse.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: <stable@vger.kernel.org>	[4.11+]
Cc: Colin Walters <walters@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Ondrej Holy <oholy@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-11-29 18:40:43 -08:00
..
Kconfig Fix dead URLs to ftp.kernel.org 2017-03-28 16:16:52 +02:00
Makefile autofs4: add miscellaneous device for ioctls 2008-10-16 11:21:39 -07:00
autofs_i.h autofs: non functional header inclusion cleanup 2017-09-08 18:26:50 -07:00
dev-ioctl.c autofs: use unsigned int/long instead of uint/ulong for ioctl args 2017-09-08 18:26:50 -07:00
expire.c autofs - dont hold spin lock over direct mount expire 2016-12-03 20:51:50 -05:00
init.c autofs4: coding style fixes 2016-03-15 16:55:16 -07:00
inode.c don't open-code file_inode() 2016-12-04 18:29:28 -05:00
root.c autofs: revert "autofs: take more care to not update last_used on path walk" 2017-11-29 18:40:43 -08:00
symlink.c vfs: remove ".readlink = generic_readlink" assignments 2016-12-09 16:45:04 +01:00
waitq.c autofs: don't fail mount for transient error 2017-11-17 16:10:02 -08:00