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 |
---|---|---|
Makefile | -rw-r--r-- | 1.4 KB |
callback_srm.S | -rw-r--r-- | 2.8 KB |
checksum.c | -rw-r--r-- | 4.5 KB |
clear_page.S | -rw-r--r-- | 401 bytes |
clear_user.S | -rw-r--r-- | 2.6 KB |
copy_page.S | -rw-r--r-- | 532 bytes |
copy_user.S | -rw-r--r-- | 2.5 KB |
csum_ipv6_magic.S | -rw-r--r-- | 2.8 KB |
csum_partial_copy.c | -rw-r--r-- | 8.7 KB |
dbg_current.S | -rw-r--r-- | 402 bytes |
dbg_stackcheck.S | -rw-r--r-- | 427 bytes |
dbg_stackkill.S | -rw-r--r-- | 575 bytes |
dec_and_lock.c | -rw-r--r-- | 809 bytes |
divide.S | -rw-r--r-- | 4.2 KB |
ev6-clear_page.S | -rw-r--r-- | 602 bytes |
ev6-clear_user.S | -rw-r--r-- | 7.2 KB |
ev6-copy_page.S | -rw-r--r-- | 4.2 KB |
ev6-copy_user.S | -rw-r--r-- | 7.3 KB |
ev6-csum_ipv6_magic.S | -rw-r--r-- | 5.1 KB |
ev6-divide.S | -rw-r--r-- | 6.2 KB |
ev6-memchr.S | -rw-r--r-- | 5.2 KB |
ev6-memcpy.S | -rw-r--r-- | 6.1 KB |
ev6-memset.S | -rw-r--r-- | 15.8 KB |
ev6-strncpy_from_user.S | -rw-r--r-- | 11.3 KB |
ev6-stxcpy.S | -rw-r--r-- | 9.4 KB |
ev6-stxncpy.S | -rw-r--r-- | 11.2 KB |
ev67-strcat.S | -rw-r--r-- | 1.5 KB |
ev67-strchr.S | -rw-r--r-- | 2.7 KB |
ev67-strlen.S | -rw-r--r-- | 1.2 KB |
ev67-strlen_user.S | -rw-r--r-- | 2.5 KB |
ev67-strncat.S | -rw-r--r-- | 2.4 KB |
ev67-strrchr.S | -rw-r--r-- | 3.2 KB |
fls.c | -rw-r--r-- | 1.1 KB |
fpreg.c | -rw-r--r-- | 6.0 KB |
memchr.S | -rw-r--r-- | 4.9 KB |
memcpy.c | -rw-r--r-- | 4.0 KB |
memmove.S | -rw-r--r-- | 2.6 KB |
memset.S | -rw-r--r-- | 2.9 KB |
srm_printk.c | -rw-r--r-- | 656 bytes |
srm_puts.c | -rw-r--r-- | 370 bytes |
stacktrace.c | -rw-r--r-- | 2.6 KB |
strcat.S | -rw-r--r-- | 946 bytes |
strchr.S | -rw-r--r-- | 1.9 KB |
strcpy.S | -rw-r--r-- | 407 bytes |
strlen.S | -rw-r--r-- | 1.1 KB |
strlen_user.S | -rw-r--r-- | 1.9 KB |
strncat.S | -rw-r--r-- | 1.8 KB |
strncpy.S | -rw-r--r-- | 1.5 KB |
strncpy_from_user.S | -rw-r--r-- | 9.9 KB |
strrchr.S | -rw-r--r-- | 2.7 KB |
stxcpy.S | -rw-r--r-- | 8.7 KB |
stxncpy.S | -rw-r--r-- | 10.6 KB |
udelay.c | -rw-r--r-- | 1.1 KB |
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...