Re: Old O_DIRECT story

2015-01-05 Thread Leon Pollak
IMHO(!): 1. It will be slower, as pre-fill takes its significant time. 2. DMA-Kernel competition makes this method unusable. On 6 January 2015 at 04:04, Kirill A. Shutemov wrote: > On Mon, Jan 05, 2015 at 03:52:10PM +, One Thousand Gnomes wrote: >> > I tried in all ways to implement this with

Old O_DIRECT story

2014-12-27 Thread Leon Pollak
Hi, all. There was a discussion here: https://lkml.org/lkml/2007/1/10/231 Linus wrote in this discussion: "So don't use O_DIRECT. Use things like madvise() and posix_fadvise() instead" After the full week of tests, searches, discussions, I have impudence to turn to the community - has one tried t

Re: What is wrong?

2014-03-04 Thread Leon Pollak
Hello, all. I am really sorry for the silence - I was on the business trip and returned today. I will recheck everything and try. Meanwhile, the news are not good: our guys say that it appears that the additional sync DOES NOT SOLVE the issue. I ask for excuse, but as I did not know the exact