Andrew Morton c64610ba58 [PATCH] block_read_full_page() get_block() error handling fix ... If block_read_full_page() detects an error when running get_block() it will run SetPageError(), then it will zero out the block in pagecache and will mark the buffer_head uptodate. So at the end of readahead we end up with a non-uptodate pagecache page which is marked PageError. But it has uptodate buffers. The pagefault code will run ClearPageError, will launch readpage a second time and block_read_full_page() will notice the uptodate buffers and will mark the page uptodate as well. We end up with an uptodate, !PageError page full of zeros and the error is lost. (It seems a little odd that filemap_nopage() runs ClearPageError(). I guess all of this adds up to meaning that for each attempted access to the page, the pagefault handler will retry the I/O. Which is good and bad. If the app is ignoring SIGBUS for some reason we could get a lot of back-to-back I/O errors.) Fix it by not marking the pagecache buffer_head as uptodate if the attempt to map that buffer to a disk block failed. Credit-to: Qu Fuping <fs@ercist.iscas.ac.cn> For reporting the bug and identifying its source. Signed-off-by: Qu Fuping <fs@ercist.iscas.ac.cn> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2005-05-17 07:59:20 -07:00
..
adfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
affs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
afs	[PATCH] Exterminate PAGE_BUG	2005-05-01 08:59:01 -07:00
autofs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
autofs4	[PATCH] autofs4: tree race fix	2005-05-01 08:59:17 -07:00
befs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
bfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
cifs	[PATCH] remove BK documentation	2005-05-05 16:36:42 -07:00
coda	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
cramfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
debugfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
devfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
devpts	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
efs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
exportfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
ext2	[PATCH] ext2 corruption - regression between 2.6.9 and 2.6.10	2005-04-16 15:25:45 -07:00
ext3	[PATCH] revert ext3-writepages-support-for-writeback-mode	2005-05-05 16:36:44 -07:00
fat	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
freevxfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
hfs	[PATCH] hfs, hfsplus: don't leak s_fs_info and fix an oops	2005-05-01 08:59:16 -07:00
hfsplus	[PATCH] hfs, hfsplus: don't leak s_fs_info and fix an oops	2005-05-01 08:59:16 -07:00
hostfs	[PATCH] uml: hostfs failed mount handling	2005-05-05 16:36:37 -07:00
hpfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
hppfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
hugetlbfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
isofs	[PATCH] isofs includes sanitized	2005-04-25 18:32:12 -07:00
jbd	[PATCH] jbd dirty buffer leak fix	2005-04-16 15:26:36 -07:00
jffs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
jffs2	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
jfs	JFS: Endian errors	2005-05-04 09:11:49 -05:00
lockd	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
minix	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
msdos	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
ncpfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
nfs	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
nfsd	[PATCH] nfsd4: fix struct file leak	2005-04-16 15:26:38 -07:00
nls	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
ntfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
openpromfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
partitions	[PATCH] revert msdos partitioning fix	2005-05-06 22:09:27 -07:00
proc	[PATCH] fix impossible VmallocChunk	2005-05-17 07:59:10 -07:00
qnx4	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
ramfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
reiserfs	[PATCH] reiserfs: use NULL instead of 0	2005-05-05 16:36:48 -07:00
romfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
smbfs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
sysfs	[PATCH] DocBook: fix some descriptions	2005-05-01 08:59:26 -07:00
sysv	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
udf	[PATCH] fs/udf/udftime.c: fix off by one error	2005-05-05 16:36:51 -07:00
ufs	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
umsdos	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
vfat	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
xfs	[XFS] Cleanup use of loff_t vs xfs_off_t in the core code.	2005-05-05 13:33:40 -07:00
aio.c	[PATCH] aio: optimize io_submit_one()	2005-05-01 08:59:16 -07:00
attr.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
bad_inode.c	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
binfmt_aout.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
binfmt_elf_fdpic.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
binfmt_elf.c	[PATCH] fix Linux kernel ELF core dump privilege elevation	2005-05-16 21:07:05 -07:00
binfmt_em86.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
binfmt_flat.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
binfmt_misc.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
binfmt_script.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
binfmt_som.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
bio.c	[PATCH] DocBook: fix some descriptions	2005-05-01 08:59:26 -07:00
block_dev.c	[PATCH] remove do_sync parameter from __invalidate_device	2005-05-05 16:36:44 -07:00
buffer.c	[PATCH] block_read_full_page() get_block() error handling fix	2005-05-17 07:59:20 -07:00
char_dev.c	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
compat_ioctl.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
compat.c	[PATCH] NFS4: Don't use __user with compat_uptr_t	2005-04-27 15:39:03 -07:00
dcache.c	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
dcookies.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
direct-io.c	[PATCH] Direct IO async short read fix	2005-04-16 15:25:50 -07:00
dnotify.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
dquot.c	[PATCH] quota: fix possible oops on quotaoff	2005-04-16 15:25:46 -07:00
eventpoll.c	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
exec.c	[PATCH] comments on locking of task->comm	2005-05-05 16:36:48 -07:00
fcntl.c	[PATCH] convert that currently tests _NSIG directly to use valid_signal()	2005-05-01 08:59:14 -07:00
fifo.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
file_table.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
file.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
filesystems.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
fs-writeback.c	[PATCH] DocBook: fix some descriptions	2005-05-01 08:59:26 -07:00
inode.c	[PATCH] remove do_sync parameter from __invalidate_device	2005-05-05 16:36:44 -07:00
ioctl.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
Kconfig	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
Kconfig.binfmt	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
libfs.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
locks.c	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
Makefile	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
mbcache.c	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
mpage.c	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
namei.c	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
namespace.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
nfsctl.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
open.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
pipe.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
posix_acl.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
quota_v1.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
quota_v2.c	[PATCH] quota: possible bug in quota format v2 support	2005-04-16 15:25:47 -07:00
quota.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
read_write.c	[PATCH] undo do_readv_writev() behavior change	2005-04-16 15:25:49 -07:00
readdir.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
select.c	[PATCH] make some things static	2005-05-05 16:36:47 -07:00
seq_file.c	[PATCH] DocBook: fix some descriptions	2005-05-01 08:59:26 -07:00
stat.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
super.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
xattr_acl.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
xattr.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00