public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
* Regression: kernels since 2.6.26 are unusably slow
@ 2009-09-25 22:09 Aneurin Price
  2009-09-25 22:51 ` Frans Pop
  2009-09-26  7:20 ` Arjan van de Ven
  0 siblings, 2 replies; 7+ messages in thread
From: Aneurin Price @ 2009-09-25 22:09 UTC (permalink / raw)
  To: linux-kernel

Hi,
Every kernel since 2.6.26 has been unusably slow for me - to the extent that I
initially thought they were hanging on boot. Exactly how bad it is seems to
vary, but it could take several minutes to boot, and then another minute or two
to log in (with bash pegging the CPU as it loads). Everything seems to need
vastly more CPU time than usual - it feels a little like I'm using a 486.

I've bisected the problem down to commit
42651f15824d003e8357693ab72c4dbb3e280836 (x86: fix trimming e820 with MTRR
holes). Having basically no idea what that means, I thought I'd try building a
kernel with MTRRs disabled, to see if that would make any difference, but no
joy.

Can anyone give me some idea of where to go next, or let me know what further
information I should provide?

Thanks,
Nye

^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2009-09-26 22:51 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-09-25 22:09 Regression: kernels since 2.6.26 are unusably slow Aneurin Price
2009-09-25 22:51 ` Frans Pop
2009-09-26  1:02   ` Aneurin Price
2009-09-26  1:47     ` Yinghai Lu
2009-09-26  2:49       ` Robert Hancock
2009-09-26 22:51         ` Aneurin Price
2009-09-26  7:20 ` Arjan van de Ven

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox