Re: [PATCH 2/3] mm: Provide address_space operation for filling pages for read
From: Christoph Hellwig <hch@infradead.org>
Date: 2021-01-20 16:56:31
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linux-fsdevel
On Wed, Jan 20, 2021 at 05:06:10PM +0100, Jan Kara wrote:
Provide an address_space operation for filling pages needed for read into page cache. Filesystems can use this operation to seriealize page cache filling with e.g. hole punching properly.
Besides the impending rewrite of the area - having another indirection here is just horrible for performance. If we want locking in this area it should be in core code and common for multiple file systems.