On Fri, Mar 22, 2019 at 04:44:11PM +0100, Arnd Bergmann wrote: > From: Al Viro <viro@xxxxxxxxxxxxxxxxxx> > > It's not hard to trigger a bunch of d_invalidate() on the same > dentry in parallel. They end up fighting each other - any > dentry picked for removal by one will be skipped by the rest > and we'll go for the next iteration through the entire > subtree, even if everything is being skipped. Morevoer, we > immediately go back to scanning the subtree. The only thing > we really need is to dissolve all mounts in the subtree and > as soon as we've nothing left to do, we can just unhash the > dentry and bugger off. > > Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx> > (cherry picked from commit 81be24d263dbeddaba35827036d6f6787a59c2c3) > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> > --- > fs/dcache.c | 10 ++++------ > 1 file changed, 4 insertions(+), 6 deletions(-) Also added to 4.9.y
