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>
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File | Mode | Size |
---|---|---|
Kconfig | -rw-r--r-- | 473 bytes |
Makefile | -rw-r--r-- | 251 bytes |
attr.c | -rw-r--r-- | 2.6 KB |
bfind.c | -rw-r--r-- | 4.6 KB |
bitmap.c | -rw-r--r-- | 5.8 KB |
bnode.c | -rw-r--r-- | 11.3 KB |
brec.c | -rw-r--r-- | 13.5 KB |
btree.c | -rw-r--r-- | 8.5 KB |
btree.h | -rw-r--r-- | 5.4 KB |
catalog.c | -rw-r--r-- | 9.2 KB |
dir.c | -rw-r--r-- | 7.7 KB |
extent.c | -rw-r--r-- | 13.5 KB |
hfs.h | -rw-r--r-- | 9.1 KB |
hfs_fs.h | -rw-r--r-- | 8.4 KB |
inode.c | -rw-r--r-- | 17.9 KB |
mdb.c | -rw-r--r-- | 10.2 KB |
part_tbl.c | -rw-r--r-- | 2.9 KB |
string.c | -rw-r--r-- | 3.8 KB |
super.c | -rw-r--r-- | 12.2 KB |
sysdep.c | -rw-r--r-- | 1.0 KB |
trans.c | -rw-r--r-- | 3.3 KB |
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