I'm using the -ac kernels, with riels VM. unfortunately that vm is not documented at all, I have no idea how it works exactly. I'm trying to tune a bit bdflush maybe if would help, but I didnt have too much succes yet with it. regards, greg ps: what is the loop helper thread? At 14:15 2002. 08. 27.دف', you wrote: >Newsmail wrote: > > I have an aes128 partition, I use loop-aes. I would like to ask, that when > > linux caches the data prior to disk write, does it cache it in its > > encrypted form or in plain? > >Data is cached in unencrypted form. > > > because, many times when I have big disk i/o > > the machine seems to freeze for some seconds. I think that this is because > > bdflush begins to write out cached plain data from memory, and encrypts all > > in once, which results in this sort of freeze. is that right? > >Yes. > >Loop helper thread will release CPU pretty quickly if scheduler says it >should reschedule. Ingo Molnar's new scheduler gives loop helper thread >(that does time consuming encryption) much more CPU time than mainline >scheduler. > >Problem may also be that large number of dirty RAM pages are unavailable for >other use until their contents are encrypted and transferred to disk. RAM >shortage causes delays in program execution. > > > ps: if anybody experienced this before, did he found any remedy for the > problem? > >What kernel version are you using? -ac and -aa kernels have better VM than >mainline kernels. > >Regards, >Jari Ruusu <jari.ruusu@pp.inet.fi> - Linux-crypto: cryptography in and on the Linux system Archive: http://mail.nl.linux.org/linux-crypto/
