Buffered write deadlock fix and new aops for 2.6.21-rc6-mm1

Nick Piggin linux-ext4 linux-fsdevel linux-mm 1 version Apr 24, 2007 In review

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v1 Latest Apr 24, 200744 patches 16 repliesIn review

Patches in v1 No applies recorded yet

#	Subject and files	Size	Replies
1/44	mm: revert KERNEL_DS buffered write optimisation`mm/filemap.c`	+13 ~~-19~~	0 replies
2/44	Revert 81b0c8713385ce1b1b9058e916edcf9561ad76d6`mm/filemap.c` `mm/filemap.h`	+3 ~~-10~~	0 replies
3/44	Revert 6527c2bdf1f833cc18e8f42bd97973d583e4aa83`mm/filemap.c`	+7 ~~-11~~	0 replies
4/44	mm: clean up buffered write code`mm/filemap.c`	+18 ~~-17~~	0 replies
5/44	mm: debug write deadlocks`mm/filemap.c`	+2 -0	0 replies
6/44	mm: trim more holes`mm/filemap.c`	+40 ~~-40~~	2 replies
7/44	mm: buffered write cleanup`fs/mpage.c` `mm/filemap.c` `mm/readahead.c`	+66 ~~-118~~	0 replies
8/44	mm: write iovec cleanup`mm/filemap.c` `mm/filemap.h` `mm/filemap_xip.c`	+69 ~~-88~~	0 replies
9/44	mm: fix pagecache write deadlocks`include/linux/pagemap.h` `mm/filemap.c`	+112 ~~-21~~	0 replies
10/44	mm: buffered write iterator`include/linux/fs.h` `mm/filemap.c` `mm/filemap.h`	+150 ~~-130~~	0 replies
11/44	fs: fix data-loss on error`fs/buffer.c`	+2 -0	0 replies
12/44	fs: introduce write_begin, write_end, and perform_write aops`Documentation/filesystems/Locking` `Documentation/filesystems/vfs.txt` `drivers/block/loop.c` +8 more	+561 ~~-210~~	4 replies
13/44	mm: restore KERNEL_DS optimisations`mm/filemap.c`	+9 -2	2 replies
14/44	implement simple fs aops`fs/configfs/inode.c` `fs/hugetlbfs/inode.c` `fs/ramfs/file-mmu.c` +3 more	+46 ~~-21~~	0 replies
15/44	block_dev convert to new aops`fs/block_dev.c`	+19 -7	0 replies
16/44	rd convert to new aops`drivers/block/rd.c`	+73 ~~-52~~	7 replies
17/44	ext2 convert to new aops`fs/ext2/dir.c` `fs/ext2/ext2.h` `fs/ext2/inode.c`	+45 ~~-29~~	0 replies
18/44	ext3 convert to new aops`fs/ext3/inode.c`	+88 ~~-48~~	0 replies
19/44	ext4 convert to new aops`fs/ext4/inode.c`	+93 ~~-54~~	0 replies
20/44	xfs convert to new aops`fs/xfs/linux-2.6/xfs_aops.c` `fs/xfs/linux-2.6/xfs_lrw.c`	+24 ~~-30~~	0 replies
21/44	fs: new cont helpers`fs/buffer.c` `include/linux/buffer_head.h` `include/linux/fs.h` +1 more	+110 ~~-105~~	0 replies
22/44	fat convert to new aops`fs/fat/inode.c`	+16 ~~-11~~	0 replies
23/44	adfs convert to new aops`fs/adfs/inode.c`	+9 -5	0 replies
24/44	affs convert to new aops`fs/affs/file.c`	+58 ~~-48~~	0 replies
25/44	hfs convert to new aops`fs/hfs/extent.c` `fs/hfs/inode.c`	+20 ~~-19~~	0 replies
26/44	hfsplus convert to new aops`fs/hfsplus/extents.c` `fs/hfsplus/inode.c`	+21 ~~-20~~	0 replies
27/44	hpfs convert to new aops`fs/hpfs/file.c`	+14 -6	0 replies
28/44	bfs convert to new aops`fs/bfs/file.c`	+8 -4	0 replies
29/44	qnx4 convert to new aops`fs/qnx4/inode.c`	+13 -8	0 replies
30/44	nfs convert to new aops`fs/nfs/file.c`	+36 ~~-13~~	0 replies
31/44	smb convert to new aops`fs/smbfs/file.c`	+25 -9	0 replies
32/44	ocfs2: convert to new aops`fs/ocfs2/aops.c` `fs/ocfs2/aops.h` `fs/ocfs2/file.c`	+453 ~~-624~~	0 replies
33/44	gfs2 convert to new aops`fs/gfs2/ops_address.c`	+125 ~~-84~~	0 replies
34/44	fs: no AOP_TRUNCATED_PAGE for writes`Documentation/filesystems/vfs.txt` `fs/ecryptfs/mmap.c` `include/linux/fs.h` +1 more	+20 ~~-48~~	0 replies
35/44	ecryptfs convert to new aops`fs/ecryptfs/crypto.c` `fs/ecryptfs/ecryptfs_kernel.h` `fs/ecryptfs/mmap.c`	+119 ~~-130~~	0 replies
36/44	fuse convert to new aops`fs/fuse/file.c`	+33 ~~-15~~	0 replies
37/44	hostfs convert to new aops`fs/hostfs/hostfs_kern.c`	+28 ~~-42~~	1 reply
38/44	jffs2 convert to new aops`fs/jffs2/file.c`	+66 ~~-39~~	0 replies
39/44	cifs convert to new aops`fs/cifs/file.c`	+51 ~~-38~~	0 replies
40/44	ufs convert to new aops`fs/ufs/dir.c` `fs/ufs/inode.c`	+50 ~~-23~~	0 replies
41/44	udf convert to new aops`fs/udf/file.c` `fs/udf/inode.c`	+20 ~~-23~~	0 replies
42/44	sysv convert to new aops`fs/sysv/dir.c` `fs/sysv/itree.c`	+44 ~~-24~~	0 replies
43/44	minix convert to new aops`fs/minix/dir.c` `fs/minix/inode.c`	+44 ~~-22~~	0 replies
44/44	jfs convert to new aops`fs/jfs/inode.c`	+11 -8	0 replies

Reviews trailers per patch

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Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.

Read the v1 thread

Cover letter [patch 00/44] Buffered write deadlock fix and new aops for 2.6.21-rc6-mm1

Hi, these patches are against 2.6.21-rc6-mm1. Aside from OCFS2, there were no major clashes between -mm and mainline diffs, which is nice.

These patches aim to solve the long standing buffered write deadlocks, and then go on to introduce a pair of new write a_op methods which allow the deadlock to be solved without taking the performance hit of the backwards compatible solutions using the old APIs.

Reiserfs (and Reiser4, in -mm) are the only filesystems left unconverted, although there are a number of less common ones still untested.

Thanks,
Nick

Read the cover letter in its thread