From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
From: Christoph Hellwig <hch@lst.de>
To: linux-xfs@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org,
	linux-mm@kvack.org
Subject: iomap based buffered reads & iomap cleanups v4
Date: Wed, 30 May 2018 11:58:00 +0200
Message-Id: <20180530095813.31245-1-hch@lst.de>
Sender: owner-linux-mm@kvack.org
List-ID: <linux-fsdevel.vger.kernel.org>

Hi all,

this series adds support for buffered reads without buffer heads to
the iomap and XFS code.  It has been split from the larger series
for easier review.


A git tree is available at:

    git://git.infradead.org/users/hch/xfs.git xfs-iomap-read.4

Gitweb:

    http://git.infradead.org/users/hch/xfs.git/shortlog/refs/heads/xfs-iomap-read.4

Changes since v3:
 - remove iomap_read_bio_alloc
 - set REQ_RAHEAD flag for readpages
 - better commen on the add_to_page_cache_lru semantics for readpages
 - move all write related patches to a separate series

Changes since v2:
 - minor page_seek_hole_data tweaks
 - don't read data entirely covered by the write operation in write_begin
 - fix zeroing on write_begin I/O failure
 - remove iomap_block_needs_zeroing to make the code more clear
 - update comments on __do_page_cache_readahead

Changes since v1:
 - fix the iomap_readpages error handling
 - use unsigned file offsets in a few places to avoid arithmetic overflows
 - allocate a iomap_page in iomap_page_mkwrite to fix generic/095
 - improve a few comments
 - add more asserts
 - warn about truncated block numbers from ->bmap
 - new patch to change the __do_page_cache_readahead return value to
   unsigned int
 - remove an incorrectly added empty line
 - make inline data an explicit iomap type instead of a flag
 - add a IOMAP_F_BUFFER_HEAD flag to force use of buffers heads for gfs2,
   and keep the basic buffer head infrastructure around for now.