Messages in this thread | | | Date | Sun, 11 Apr 2004 01:14:42 +0200 (MEST) | From | Szakacsits Szabolcs <> | Subject | Re: Accessing odd last partition sector (was: [Linux-NTFS-Dev] mkntfs dirty volume marking) |
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On Sat, 10 Apr 2004 viro@parcelfarce.linux.theplanet.co.uk wrote: > On Sun, Apr 11, 2004 at 12:23:47AM +0200, Szakacsits Szabolcs wrote: > > > Just one question, in the most common cases the block size ends up between > > 512 and 4096 bytes. Depending on how this block size used, it can have a > > significant impact on performance (e.g. 512 vs 4096). Is this true or is > > it used to be performance independent? > > Resulting requests are immediately merged anyway. Yes, we get more bio > sitting on top of the merged request; however, it's heavily IO-dominated > and I would be surprised if you really saw any noticable overhead in that > situation.
Thanks, I'll test it in the near future unless somebody does it earlier.
I have my test stuff but I'm interested of you could suggest specific ones that might exhibit/trigger the overhead if it exists at all.
Szaka
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