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authorArtem Bityutskiy <artem.bityutskiy@linux.intel.com>2012-07-12 18:28:49 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-07-22 23:58:09 +0400
commit5687b5780e90278a62d4cd916a3632087066f59d (patch)
tree362f5c4b25cc1edd9ae69ac561192859cfd9c201 /fs/sysv
parentb16ca626358cbf056b752eab63ba8f20087afeaf (diff)
downloadlinux-5687b5780e90278a62d4cd916a3632087066f59d.tar.xz
hfs: get rid of hfs_sync_super
This patch makes hfs stop using the VFS '->write_super()' method along with the 's_dirt' superblock flag, because they are on their way out. The whole "superblock write-out" VFS infrastructure is served by the 'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and writes out all dirty superblocks using the '->write_super()' call-back. But the problem with this thread is that it wastes power by waking up the system every 5 seconds, even if there are no diry superblocks, or there are no client file-systems which would need this (e.g., btrfs does not use '->write_super()'). So we want to kill it completely and thus, we need to make file-systems to stop using the '->write_super()' VFS service, and then remove it together with the kernel thread. Tested using fsstress from the LTP project. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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