Revision c4f675cd40d955d539180506c09515c90169b15b authored by Sergei Trofimovich on 20 May 2011, 20:20:30 UTC, committed by Chris Mason on 23 May 2011, 17:24:14 UTC
Observed as a large delay when --mixed filesystem is filled up.
Test example:
1. create tiny --mixed FS:
$ dd if=/dev/zero of=2G.img seek=$((2048 * 1024 * 1024 - 1)) count=1 bs=1
$ mkfs.btrfs --mixed 2G.img
$ mount -oloop 2G.img /mnt/ut/
2. Try to fill it up:
$ dd if=/dev/urandom of=10M.file bs=10240 count=1024
$ seq 1 256 | while read file_no; do echo $file_no; time cp 10M.file ${file_no}.copy; done
Up to '200.copy' it goes fast, but when disk fills-up each -ENOSPC
message takes 3 seconds to pop-up _every_ ENOSPC (and in usermode linux
it's even more: 30-60 seconds!). (Maybe, time depends on kernel's timer resolution).
No IO, no CPU load, just rescheduling. Some debugging revealed busy spinning
in shrink_delalloc.
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Reviewed-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
1 parent 0f3b708
| File | Mode | Size |
|---|---|---|
| 9p | ||
| adfs | ||
| affs | ||
| afs | ||
| autofs4 | ||
| befs | ||
| bfs | ||
| btrfs | ||
| cachefiles | ||
| ceph | ||
| cifs | ||
| coda | ||
| configfs | ||
| cramfs | ||
| debugfs | ||
| devpts | ||
| dlm | ||
| ecryptfs | ||
| efs | ||
| exofs | ||
| exportfs | ||
| ext2 | ||
| ext3 | ||
| ext4 | ||
| fat | ||
| freevxfs | ||
| fscache | ||
| fuse | ||
| gfs2 | ||
| hfs | ||
| hfsplus | ||
| hostfs | ||
| hpfs | ||
| hppfs | ||
| hugetlbfs | ||
| isofs | ||
| jbd | ||
| jbd2 | ||
| jffs2 | ||
| jfs | ||
| lockd | ||
| logfs | ||
| minix | ||
| ncpfs | ||
| nfs | ||
| nfs_common | ||
| nfsd | ||
| nilfs2 | ||
| nls | ||
| notify | ||
| ntfs | ||
| ocfs2 | ||
| omfs | ||
| openpromfs | ||
| partitions | ||
| proc | ||
| pstore | ||
| qnx4 | ||
| quota | ||
| ramfs | ||
| reiserfs | ||
| romfs | ||
| squashfs | ||
| sysfs | ||
| sysv | ||
| ubifs | ||
| udf | ||
| ufs | ||
| xfs | ||
| Kconfig | -rw-r--r-- | 5.3 KB |
| Kconfig.binfmt | -rw-r--r-- | 6.4 KB |
| Makefile | -rw-r--r-- | 4.0 KB |
| aio.c | -rw-r--r-- | 45.9 KB |
| anon_inodes.c | -rw-r--r-- | 6.3 KB |
| attr.c | -rw-r--r-- | 6.6 KB |
| bad_inode.c | -rw-r--r-- | 7.8 KB |
| binfmt_aout.c | -rw-r--r-- | 12.4 KB |
| binfmt_elf.c | -rw-r--r-- | 53.7 KB |
| binfmt_elf_fdpic.c | -rw-r--r-- | 48.7 KB |
| binfmt_em86.c | -rw-r--r-- | 2.8 KB |
| binfmt_flat.c | -rw-r--r-- | 26.8 KB |
| binfmt_misc.c | -rw-r--r-- | 15.2 KB |
| binfmt_script.c | -rw-r--r-- | 2.8 KB |
| binfmt_som.c | -rw-r--r-- | 7.4 KB |
| bio-integrity.c | -rw-r--r-- | 21.2 KB |
| bio.c | -rw-r--r-- | 39.5 KB |
| block_dev.c | -rw-r--r-- | 39.8 KB |
| buffer.c | -rw-r--r-- | 86.3 KB |
| char_dev.c | -rw-r--r-- | 13.8 KB |
| compat.c | -rw-r--r-- | 55.5 KB |
| compat_binfmt_elf.c | -rw-r--r-- | 3.5 KB |
| compat_ioctl.c | -rw-r--r-- | 45.8 KB |
| dcache.c | -rw-r--r-- | 77.4 KB |
| dcookies.c | -rw-r--r-- | 6.8 KB |
| direct-io.c | -rw-r--r-- | 35.1 KB |
| drop_caches.c | -rw-r--r-- | 1.4 KB |
| eventfd.c | -rw-r--r-- | 11.0 KB |
| eventpoll.c | -rw-r--r-- | 43.8 KB |
| exec.c | -rw-r--r-- | 48.9 KB |
| fcntl.c | -rw-r--r-- | 18.7 KB |
| fhandle.c | -rw-r--r-- | 6.5 KB |
| fifo.c | -rw-r--r-- | 3.2 KB |
| file.c | -rw-r--r-- | 12.0 KB |
| file_table.c | -rw-r--r-- | 13.2 KB |
| filesystems.c | -rw-r--r-- | 6.4 KB |
| fs-writeback.c | -rw-r--r-- | 35.4 KB |
| fs_struct.c | -rw-r--r-- | 3.9 KB |
| generic_acl.c | -rw-r--r-- | 4.7 KB |
| inode.c | -rw-r--r-- | 44.1 KB |
| internal.h | -rw-r--r-- | 3.4 KB |
| ioctl.c | -rw-r--r-- | 15.7 KB |
| ioprio.c | -rw-r--r-- | 5.0 KB |
| libfs.c | -rw-r--r-- | 25.3 KB |
| locks.c | -rw-r--r-- | 58.3 KB |
| mbcache.c | -rw-r--r-- | 16.3 KB |
| mpage.c | -rw-r--r-- | 19.9 KB |
| namei.c | -rw-r--r-- | 84.1 KB |
| namespace.c | -rw-r--r-- | 65.0 KB |
| nfsctl.c | -rw-r--r-- | 2.1 KB |
| no-block.c | -rw-r--r-- | 688 bytes |
| open.c | -rw-r--r-- | 26.7 KB |
| pipe.c | -rw-r--r-- | 28.4 KB |
| pnode.c | -rw-r--r-- | 9.3 KB |
| pnode.h | -rw-r--r-- | 1.1 KB |
| posix_acl.c | -rw-r--r-- | 8.6 KB |
| read_write.c | -rw-r--r-- | 20.8 KB |
| read_write.h | -rw-r--r-- | 542 bytes |
| readdir.c | -rw-r--r-- | 6.9 KB |
| select.c | -rw-r--r-- | 24.2 KB |
| seq_file.c | -rw-r--r-- | 17.8 KB |
| signalfd.c | -rw-r--r-- | 7.5 KB |
| splice.c | -rw-r--r-- | 46.5 KB |
| stack.c | -rw-r--r-- | 2.7 KB |
| stat.c | -rw-r--r-- | 10.6 KB |
| statfs.c | -rw-r--r-- | 5.0 KB |
| super.c | -rw-r--r-- | 24.3 KB |
| sync.c | -rw-r--r-- | 10.2 KB |
| timerfd.c | -rw-r--r-- | 6.5 KB |
| utimes.c | -rw-r--r-- | 5.7 KB |
| xattr.c | -rw-r--r-- | 15.7 KB |
| xattr_acl.c | -rw-r--r-- | 2.3 KB |
Computing file changes ...
