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

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On Fri, Nov 22, 2019 at 10:52:53AM +0000, Lee Jones wrote:
From: Jan Kara <jack@xxxxxxx>

[ 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?

--
Thanks,
Sasha



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