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 |
|---|---|---|
| async_tx | ||
| Kconfig | -rw-r--r-- | 24.2 KB |
| Makefile | -rw-r--r-- | 3.2 KB |
| ablkcipher.c | -rw-r--r-- | 16.5 KB |
| aead.c | -rw-r--r-- | 12.6 KB |
| aes_generic.c | -rw-r--r-- | 61.9 KB |
| af_alg.c | -rw-r--r-- | 9.3 KB |
| ahash.c | -rw-r--r-- | 12.1 KB |
| algapi.c | -rw-r--r-- | 19.0 KB |
| algboss.c | -rw-r--r-- | 6.3 KB |
| algif_hash.c | -rw-r--r-- | 6.7 KB |
| algif_skcipher.c | -rw-r--r-- | 13.2 KB |
| ansi_cprng.c | -rw-r--r-- | 10.9 KB |
| anubis.c | -rw-r--r-- | 27.8 KB |
| api.c | -rw-r--r-- | 13.4 KB |
| arc4.c | -rw-r--r-- | 2.0 KB |
| authenc.c | -rw-r--r-- | 19.6 KB |
| authencesn.c | -rw-r--r-- | 23.4 KB |
| blkcipher.c | -rw-r--r-- | 18.6 KB |
| blowfish.c | -rw-r--r-- | 17.5 KB |
| camellia.c | -rw-r--r-- | 35.9 KB |
| cast5.c | -rw-r--r-- | 33.0 KB |
| cast6.c | -rw-r--r-- | 21.4 KB |
| cbc.c | -rw-r--r-- | 7.4 KB |
| ccm.c | -rw-r--r-- | 21.5 KB |
| chainiv.c | -rw-r--r-- | 8.6 KB |
| cipher.c | -rw-r--r-- | 3.3 KB |
| compress.c | -rw-r--r-- | 1.3 KB |
| crc32c.c | -rw-r--r-- | 8.0 KB |
| cryptd.c | -rw-r--r-- | 24.8 KB |
| crypto_null.c | -rw-r--r-- | 4.9 KB |
| crypto_wq.c | -rw-r--r-- | 942 bytes |
| ctr.c | -rw-r--r-- | 10.8 KB |
| cts.c | -rw-r--r-- | 9.8 KB |
| deflate.c | -rw-r--r-- | 5.5 KB |
| des_generic.c | -rw-r--r-- | 35.6 KB |
| ecb.c | -rw-r--r-- | 4.9 KB |
| eseqiv.c | -rw-r--r-- | 6.5 KB |
| fcrypt.c | -rw-r--r-- | 18.0 KB |
| fips.c | -rw-r--r-- | 705 bytes |
| gcm.c | -rw-r--r-- | 34.5 KB |
| gf128mul.c | -rw-r--r-- | 13.2 KB |
| ghash-generic.c | -rw-r--r-- | 3.7 KB |
| hmac.c | -rw-r--r-- | 6.9 KB |
| internal.h | -rw-r--r-- | 3.9 KB |
| khazad.c | -rw-r--r-- | 51.8 KB |
| krng.c | -rw-r--r-- | 1.5 KB |
| lrw.c | -rw-r--r-- | 7.6 KB |
| lzo.c | -rw-r--r-- | 2.5 KB |
| md4.c | -rw-r--r-- | 6.1 KB |
| md5.c | -rw-r--r-- | 7.5 KB |
| michael_mic.c | -rw-r--r-- | 3.6 KB |
| pcbc.c | -rw-r--r-- | 7.7 KB |
| pcompress.c | -rw-r--r-- | 2.5 KB |
| pcrypt.c | -rw-r--r-- | 14.7 KB |
| proc.c | -rw-r--r-- | 3.6 KB |
| ripemd.h | -rw-r--r-- | 974 bytes |
| rmd128.c | -rw-r--r-- | 10.2 KB |
| rmd160.c | -rw-r--r-- | 12.6 KB |
| rmd256.c | -rw-r--r-- | 10.5 KB |
| rmd320.c | -rw-r--r-- | 13.1 KB |
| rng.c | -rw-r--r-- | 2.8 KB |
| salsa20_generic.c | -rw-r--r-- | 6.7 KB |
| scatterwalk.c | -rw-r--r-- | 2.9 KB |
| seed.c | -rw-r--r-- | 17.4 KB |
| seqiv.c | -rw-r--r-- | 8.6 KB |
| serpent.c | -rw-r--r-- | 19.8 KB |
| sha1_generic.c | -rw-r--r-- | 3.4 KB |
| sha256_generic.c | -rw-r--r-- | 12.2 KB |
| sha512_generic.c | -rw-r--r-- | 8.8 KB |
| shash.c | -rw-r--r-- | 16.2 KB |
| tcrypt.c | -rw-r--r-- | 27.7 KB |
| tcrypt.h | -rw-r--r-- | 3.4 KB |
| tea.c | -rw-r--r-- | 7.1 KB |
| testmgr.c | -rw-r--r-- | 54.4 KB |
| testmgr.h | -rw-r--r-- | 328.3 KB |
| tgr192.c | -rw-r--r-- | 30.8 KB |
| twofish_common.c | -rw-r--r-- | 37.7 KB |
| twofish_generic.c | -rw-r--r-- | 6.3 KB |
| vmac.c | -rw-r--r-- | 17.9 KB |
| wp512.c | -rw-r--r-- | 60.1 KB |
| xcbc.c | -rw-r--r-- | 7.2 KB |
| xor.c | -rw-r--r-- | 3.9 KB |
| xts.c | -rw-r--r-- | 7.1 KB |
| zlib.c | -rw-r--r-- | 9.6 KB |
Computing file changes ...
