Messages in this thread | | | Date | Thu, 15 May 2008 01:16:00 +0400 | From | Alexey Dobriyan <> | Subject | 2.6.26-rc2-mm1: sloooow mkfs.ext2 |
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mkfs.ext2 became kick-ass slow:
+ sudo mkfs.ext2 -F mke2fs 1.40.6 (09-Feb-2008) Warning: 256-byte inodes not usable on older systems Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 9773056 inodes, 39072726 blocks 1953636 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=4294967296 1193 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: ...
Writing inode tables: 193/1193 ^^^^ counter moves slowly, occasional counting at what seems to be normal speed occur.
160 GB SATA disk, no partitions. According to sysfs, CFQ is in use, the rest is compiled out. 2.6.26-rc2 is fine, mkfs takes ~1 min.
Slowdown is totally reproducible.
CONFIG_ATA=y CONFIG_ATA_ACPI=y CONFIG_SATA_AHCI=y CONFIG_ATA_SFF=y CONFIG_ATA_PIIX=y CONFIG_PATA_JMICRON=y
/sys/block/sdb/queue/iosched/back_seek_max 16384 /sys/block/sdb/queue/iosched/back_seek_penalty 2 /sys/block/sdb/queue/iosched/fifo_expire_async 250 /sys/block/sdb/queue/iosched/fifo_expire_sync 120 /sys/block/sdb/queue/iosched/quantum 4 /sys/block/sdb/queue/iosched/slice_async 40 /sys/block/sdb/queue/iosched/slice_async_rq 2 /sys/block/sdb/queue/iosched/slice_idle 10 /sys/block/sdb/queue/iosched/slice_sync 100
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