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authorArtem Bityutskiy <artem.bityutskiy@linux.intel.com>2012-06-06 17:56:57 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2012-07-14 14:32:45 +0200
commit3dd847820d138c9d60764b0e920380373285ff10 (patch)
tree3eb6584eac00b8a6cf859d003ad0c1940e7e299c /fs/direct-io.c
parentaffs: introduce VFS superblock object back-reference (diff)
downloadlinux-3dd847820d138c9d60764b0e920380373285ff10.tar.xz
linux-3dd847820d138c9d60764b0e920380373285ff10.zip
affs: get rid of affs_sync_super
This patch makes affs 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. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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