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 |
|---|---|---|
| cluster | ||
| dlm | ||
| dlmfs | ||
| Kconfig | -rw-r--r-- | 2.4 KB |
| Makefile | -rw-r--r-- | 1005 bytes |
| acl.c | -rw-r--r-- | 11.8 KB |
| acl.h | -rw-r--r-- | 1.0 KB |
| alloc.c | -rw-r--r-- | 183.1 KB |
| alloc.h | -rw-r--r-- | 11.7 KB |
| aops.c | -rw-r--r-- | 51.7 KB |
| aops.h | -rw-r--r-- | 3.3 KB |
| blockcheck.c | -rw-r--r-- | 16.4 KB |
| blockcheck.h | -rw-r--r-- | 3.8 KB |
| buffer_head_io.c | -rw-r--r-- | 10.4 KB |
| buffer_head_io.h | -rw-r--r-- | 2.4 KB |
| dcache.c | -rw-r--r-- | 14.6 KB |
| dcache.h | -rw-r--r-- | 2.1 KB |
| dir.c | -rw-r--r-- | 115.7 KB |
| dir.h | -rw-r--r-- | 3.9 KB |
| dlmglue.c | -rw-r--r-- | 113.0 KB |
| dlmglue.h | -rw-r--r-- | 5.8 KB |
| export.c | -rw-r--r-- | 6.3 KB |
| export.h | -rw-r--r-- | 1.0 KB |
| extent_map.c | -rw-r--r-- | 21.3 KB |
| extent_map.h | -rw-r--r-- | 2.7 KB |
| file.c | -rw-r--r-- | 64.4 KB |
| file.h | -rw-r--r-- | 2.6 KB |
| heartbeat.c | -rw-r--r-- | 3.4 KB |
| heartbeat.h | -rw-r--r-- | 1.5 KB |
| inode.c | -rw-r--r-- | 39.4 KB |
| inode.h | -rw-r--r-- | 6.0 KB |
| ioctl.c | -rw-r--r-- | 13.3 KB |
| ioctl.h | -rw-r--r-- | 330 bytes |
| journal.c | -rw-r--r-- | 56.3 KB |
| journal.h | -rw-r--r-- | 21.9 KB |
| localalloc.c | -rw-r--r-- | 33.3 KB |
| localalloc.h | -rw-r--r-- | 2.0 KB |
| locks.c | -rw-r--r-- | 3.4 KB |
| locks.h | -rw-r--r-- | 1.1 KB |
| mmap.c | -rw-r--r-- | 5.0 KB |
| mmap.h | -rw-r--r-- | 134 bytes |
| namei.c | -rw-r--r-- | 59.9 KB |
| namei.h | -rw-r--r-- | 1.5 KB |
| ocfs1_fs_compat.h | -rw-r--r-- | 2.9 KB |
| ocfs2.h | -rw-r--r-- | 22.6 KB |
| ocfs2_fs.h | -rw-r--r-- | 50.6 KB |
| ocfs2_ioctl.h | -rw-r--r-- | 4.9 KB |
| ocfs2_lockid.h | -rw-r--r-- | 3.2 KB |
| ocfs2_lockingver.h | -rw-r--r-- | 959 bytes |
| ocfs2_trace.h | -rw-r--r-- | 75.1 KB |
| quota.h | -rw-r--r-- | 4.3 KB |
| quota_global.c | -rw-r--r-- | 26.7 KB |
| quota_local.c | -rw-r--r-- | 35.6 KB |
| refcounttree.c | -rw-r--r-- | 113.6 KB |
| refcounttree.h | -rw-r--r-- | 3.7 KB |
| reservations.c | -rw-r--r-- | 20.4 KB |
| reservations.h | -rw-r--r-- | 5.3 KB |
| resize.c | -rw-r--r-- | 15.9 KB |
| resize.h | -rw-r--r-- | 1.1 KB |
| slot_map.c | -rw-r--r-- | 12.2 KB |
| slot_map.h | -rw-r--r-- | 1.4 KB |
| stack_o2cb.c | -rw-r--r-- | 9.9 KB |
| stack_user.c | -rw-r--r-- | 23.2 KB |
| stackglue.c | -rw-r--r-- | 16.8 KB |
| stackglue.h | -rw-r--r-- | 8.9 KB |
| suballoc.c | -rw-r--r-- | 76.5 KB |
| suballoc.h | -rw-r--r-- | 7.1 KB |
| super.c | -rw-r--r-- | 68.8 KB |
| super.h | -rw-r--r-- | 1.7 KB |
| symlink.c | -rw-r--r-- | 4.1 KB |
| symlink.h | -rw-r--r-- | 1.3 KB |
| sysfile.c | -rw-r--r-- | 4.6 KB |
| sysfile.h | -rw-r--r-- | 1.1 KB |
| uptodate.c | -rw-r--r-- | 17.7 KB |
| uptodate.h | -rw-r--r-- | 3.0 KB |
| ver.c | -rw-r--r-- | 1.2 KB |
| ver.h | -rw-r--r-- | 1000 bytes |
| xattr.c | -rw-r--r-- | 193.6 KB |
| xattr.h | -rw-r--r-- | 3.6 KB |
Computing file changes ...
