LinuxQuestions.org - [SOLVED] ext4-dio-unwrit process count info

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ext4-dio-unwrit process count info

Hi All,

Hardware: IBM x3550M3
CPU: Xeon 2 x E5630 @ 2.53GHz
RAM: 16GB
HDD: 2x146GB SAS 10K

Kernel: 2.6.32-71.29.1.el6.centos.plus.x86_64 x86_64
OS: CentOS Linux release 6.0 (Final)

Code:

df -h

Filesystem            Size  Used Avail Use% Mounted on

/dev/mapper/vg0-lv0  9.7G  2.9G  6.3G  32% /

tmpfs                7.8G    0  7.8G  0% /dev/shm

/dev/mapper/vg0-backups

                      15G  5.2G  8.6G  38% /backups

/dev/sda1            291M  58M  218M  21% /boot

/dev/mapper/vg0-home  9.7G  151M  9.0G  2% /home

/dev/mapper/vg0-tmp  7.7G  793M  6.6G  11% /tmp

/dev/mapper/vg0-apps  9.7G  888M  8.3G  10% /usr/apps

/dev/mapper/vg0-isa  9.7G  619M  8.6G  7% /usr/isa

/dev/mapper/vg0-log_jboss

                      15G  173M  14G  2% /var/log/jboss

tmpfs                1.0G    0  1.0G  0% /usr/apps/ramdisk

Is it normal to have >= 128 processes of ext4-dio-unwrit?

IIRC, it's one ext4-dio-unwrit process per CPU per ext4 filesystem.

Ted may have updated that in later kernels (I haven't looked).
On this (i7) laptop I only see two - for two mounted f/s and 4 h/t processors (kernel is 3.2.9).