2010/12/27 Piotr Hosowicz <piotr@xxxxxxxxxxxx>: > On 27.12.2010 16:13, Piotr Hosowicz wrote: >> >> On 27.12.2010 16:08, Sedat Dilek wrote: >>> >>> 2010/12/27 Piotr Hosowicz<piotr@xxxxxxxxxxxx>: >>>> >>>> On 27.12.2010 15:48, Sedat Dilek wrote: >>>>> >>>>> 2010/12/27 Piotr Hosowicz<piotr@xxxxxxxxxxxx>: >>>>>> >>>>>> On 27.12.2010 07:04, Stephen Rothwell wrote: >>>>>> >>>>>> Hello, >>>>>> >>>>>> I noticed that after first reboot with this kernel that my MP3 >>>>>> collection >>>>>> in >>>>>> mocp layed on Ext4 fs opens painfully slow. It is not my mistake, >>>>>> because >>>>>> I >>>>>> always do it the same way, new kernel, then music on. The problem >>>>>> is not >>>>>> present in rc7-git4. I could measure it in some way (timing ls -la >>>>>> in tht >>>>>> dir?) if somebody needs it. >>>>>> >>>>>> Regards, >>>>>> >>>>>> Piotr Hosowicz >>>>>> >>>>> >>>>> You tried mblk_io_submit mount-option for that partition? >>>> >>>> No, I do not use it, I do not even know what it is. My options are: >>>> >>>> /dev/sda2 on / type ext4 (rw,errors=remount-ro) >>>> >>> >>> Have a closer look at "ext4: Turn off multiple page-io submission by >>> default" >> >> I tried to Google for mblk_io_submit but I didn't find anything helpful. >> Could you tell me how should I add this option in fstab and what will be >> its effect? > > As far as I understand that option regards writing, not reading. The > symptoms I described occured while reading only. > That's the only performance issue I am aware of in ext4 in recent time. Why don't you try it and present some numbers in transfer ratio (write, read)? - Sedat - -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
