Re: [PATCH 4.9 8/8] ext4: avoid unnecessary stalls in ext4_evict_inode()

On Fri, Nov 22, 2019 at 10:52:53AM +0000, Lee Jones wrote:

From: Jan Kara jack@suse.cz

[ Upstream commit 3abb1a0fc2871f2db52199e1748a1d48a54a3427 ]

These days inode reclaim calls evict_inode() only when it has no pages in the mapping. In that case it is not necessary to wait for transaction commit in ext4_evict_inode() as there can be no pages waiting to be committed. So avoid unnecessary transaction waiting in that case.

We still have to keep the check for the case where ext4_evict_inode() gets called from other paths (e.g. umount) where inode still can have some page cache pages.

This reads to me like an optimization?