Re: Linux 3.0+ Disk performance problem - wrong pdflush behaviour

2012-10-11 Thread Viktor Nagy
Hi, On 2012.10.10. 22:27, Jan Kara wrote: On Wed 10-10-12 22:44:41, Viktor Nagy wrote: On 10/10/2012 06:57 PM, Jan Kara wrote: Hello, On Tue 09-10-12 11:41:16, Viktor Nagy wrote: Since Kernel version 3.0 pdflush blocks writes even the dirty bytes are well below /proc/sys/vm/dirty_bytes

Re: Linux 3.0+ Disk performance problem - wrong pdflush behaviour

2012-10-11 Thread Viktor Nagy
Hi, On 2012.10.10. 22:27, Jan Kara wrote: On Wed 10-10-12 22:44:41, Viktor Nagy wrote: On 10/10/2012 06:57 PM, Jan Kara wrote: Hello, On Tue 09-10-12 11:41:16, Viktor Nagy wrote: Since Kernel version 3.0 pdflush blocks writes even the dirty bytes are well below /proc/sys/vm/dirty_bytes

Re: Linux 3.0+ Disk performance problem - wrong pdflush behaviour

2012-10-10 Thread Viktor Nagy
Hi, On 10/10/2012 06:57 PM, Jan Kara wrote: Hello, On Tue 09-10-12 11:41:16, Viktor Nagy wrote: Since Kernel version 3.0 pdflush blocks writes even the dirty bytes are well below /proc/sys/vm/dirty_bytes or /proc/sys/vm/dirty_ratio. The kernel 2.6.39 works nice. How this hurt us

Re: Linux 3.0+ Disk performance problem - wrong pdflush behaviour

2012-10-10 Thread Viktor Nagy
Hi, On 10/10/2012 06:57 PM, Jan Kara wrote: Hello, On Tue 09-10-12 11:41:16, Viktor Nagy wrote: Since Kernel version 3.0 pdflush blocks writes even the dirty bytes are well below /proc/sys/vm/dirty_bytes or /proc/sys/vm/dirty_ratio. The kernel 2.6.39 works nice. How this hurt us

Linux 3.0+ Disk performance problem - wrong pdflush behaviour

2012-10-09 Thread Viktor Nagy
cache, and 5.1 GByte RAM free (totally unused). Sorry if I not found the right place to report this, please advise me were to send. Best regards Viktor Nagy #include #include #include #include #include #include #include #include #include #include // parameters char * filename = N

Linux 3.0+ Disk performance problem - wrong pdflush behaviour

2012-10-09 Thread Viktor Nagy
free (totally unused). Sorry if I not found the right place to report this, please advise me were to send. Best regards Viktor Nagy #include stdio.h #include string.h #include getopt.h #include inttypes.h #include sys/time.h #include time.h #include stdlib.h #include unistd.h #include sys