Re: pdflush and dm-crypt

From: Arkadiusz Miskiewicz
Date: Mon Mar 29 2004 - 10:04:21 EST

Dnia Monday 29 of March 2004 16:50, Zoltan NAGY napisał:

> I've just upgraded the system to 2.6.5-rc2-bk6, and I'm using
> dm-crypt. It's a heavily used server, on average 20-30mbit/sec
> traffic is on the wire 7/24, and just noticed, that the load is very
> high. In every 4-5 sec pdflush takes a lot of cpu... Is this
> intentional? I've found a similar question on kerneltrap
> (, but havent found a solution
> yet. I'm just wondering if it is a problem, or it's the normal
> behavior? It's a 1.8 P4 with 1G ram and highmem enabled, with 256 bit
> aes thru dm-crypt.
Same here (duron 1.2GHz, 512MB ram, IDE disks (via and promise controllers))
and it doesn't matter if I'm using cryptoloop or dm-crypt.

System hangs for about one seconds (xmms stops playing, xterms are not
responding to key presses) and then everything back to normal until next hang
happens (in few seconds).

> Zoltan NAGY,
> Network Administrator

ps. I'm not sure (didn't do any checking to be sure) but afaik this started to
happening with 2.6.3 kernel.
Arkadiusz Miśkiewicz CS at FoE, Wroclaw University of Technology, 1024/3DB19BBD, JID:, PLD/Linux
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at