PROBLEM: [dm-crypt] read starvation during writeback

2012-10-12 Thread Michael Zugelder
Hi this mail was originally only sent to the dm-crypt mailing list (dm-cr...@saout.de), but since it didn't exactly attract a lot of feedback, I'm resending it to reach a larger target audience. Please keep me in CC, since I'm not subscribed to the LKML. I'm having an issue reading data via dm-c

Re: [dm-crypt] PROBLEM: read starvation during writeback

2012-10-12 Thread Michael Zugelder
Hi, On Fri, 2012-10-12 at 22:34 +0200, Milan Broz wrote: > On 10/12/2012 09:37 PM, Michael Zugelder wrote: > > Testing setup: > > * Fedora 17, stock 3.5.4-2.fc17 kernel and a self-compiled 3.6.1 kernel > > * 320 GiB USB hard drive (sdb) > > I guess that USB

Re: [dm-crypt] PROBLEM: read starvation during writeback

2012-10-13 Thread Michael Zugelder
7;t observe the really huge spikes (upwards of 20 seconds), as I do on my 1nd gen Core i5 Notebook. On Sat, 2012-10-13 at 01:06 +0200, Michael Zugelder wrote: > On Fri, 2012-10-12 at 22:34 +0200, Milan Broz wrote: > > Btw there was a proposed rewrite of internal dmcrypt queues,