* kmail slowdown on 2.6.* +reiserFS (v3)
@ 2004-01-11 20:09 Ciaby
2004-01-12 2:27 ` Andrew Morton
0 siblings, 1 reply; 6+ messages in thread
From: Ciaby @ 2004-01-11 20:09 UTC (permalink / raw)
To: linux-kernel
I all!
I've recently upgraded from 2.4 to 2.6 and I've noticed a strange thing:
on the 2.4 kernel, kmail run decently (i've an old k6-200).
On the 2.6 kernel, kmail slowdown and take a very long time to read a mailbox.
I think something changed in the reiserFS during this time...
I'm not the only experiencing this problem, read this:
http://kerneltrap.org/node/view/1844
Please CC me if there's some reply.
tnx all for the good work! :-)
Bye
--
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kmail slowdown on 2.6.* +reiserFS (v3)
2004-01-11 20:09 kmail slowdown on 2.6.* +reiserFS (v3) Ciaby
@ 2004-01-12 2:27 ` Andrew Morton
2004-01-14 13:20 ` Chris Mason
0 siblings, 1 reply; 6+ messages in thread
From: Andrew Morton @ 2004-01-12 2:27 UTC (permalink / raw)
To: Ciaby; +Cc: linux-kernel
Ciaby <ciaby@autistici.org> wrote:
>
> I all!
> I've recently upgraded from 2.4 to 2.6 and I've noticed a strange thing:
> on the 2.4 kernel, kmail run decently (i've an old k6-200).
> On the 2.6 kernel, kmail slowdown and take a very long time to read a mailbox.
> I think something changed in the reiserFS during this time...
> I'm not the only experiencing this problem, read this:
> http://kerneltrap.org/node/view/1844
A buglet in kmail was tripped up by some optimisations which went into
reiserfs.
Upgrading kmail should fix it up. Or mount the reiserfs filesystems with
the `nolargeio=1' mount option.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kmail slowdown on 2.6.* +reiserFS (v3)
2004-01-12 2:27 ` Andrew Morton
@ 2004-01-14 13:20 ` Chris Mason
2004-01-14 13:32 ` Hans Reiser
0 siblings, 1 reply; 6+ messages in thread
From: Chris Mason @ 2004-01-14 13:20 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-kernel, reiserfs-dev
On Sun, 2004-01-11 at 21:27, Andrew Morton wrote:
> Ciaby <ciaby@autistici.org> wrote:
> >
> > I all!
> > I've recently upgraded from 2.4 to 2.6 and I've noticed a strange thing:
> > on the 2.4 kernel, kmail run decently (i've an old k6-200).
> > On the 2.6 kernel, kmail slowdown and take a very long time to read a mailbox.
> > I think something changed in the reiserFS during this time...
> > I'm not the only experiencing this problem, read this:
> > http://kerneltrap.org/node/view/1844
>
> A buglet in kmail was tripped up by some optimisations which went into
> reiserfs.
>
> Upgrading kmail should fix it up. Or mount the reiserfs filesystems with
> the `nolargeio=1' mount option.
Actually, we've hit other problems with v3 largeio, it can confuse rpm
badly. The real bug is apparently in bdb, the larger io size suggested
by the filesystem lead bdb to corrupt its own files. I spent some time
neck deep in the db code but couldn't track the problem down.
I seem to remember the XFS folks hitting exactly the same bug.
Hans, can I talk you into having v3 export an io size of 4k to userspace
again? Applications that send large ios would still use Oleg's
optimized file write paths.
-chris
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kmail slowdown on 2.6.* +reiserFS (v3)
2004-01-14 13:20 ` Chris Mason
@ 2004-01-14 13:32 ` Hans Reiser
2004-01-14 13:42 ` Chris Mason
0 siblings, 1 reply; 6+ messages in thread
From: Hans Reiser @ 2004-01-14 13:32 UTC (permalink / raw)
To: Chris Mason; +Cc: Andrew Morton, linux-kernel, reiserfs-dev
Chris Mason wrote:
>On Sun, 2004-01-11 at 21:27, Andrew Morton wrote:
>
>
>>Ciaby <ciaby@autistici.org> wrote:
>>
>>
>>>I all!
>>>I've recently upgraded from 2.4 to 2.6 and I've noticed a strange thing:
>>>on the 2.4 kernel, kmail run decently (i've an old k6-200).
>>>On the 2.6 kernel, kmail slowdown and take a very long time to read a mailbox.
>>>I think something changed in the reiserFS during this time...
>>>I'm not the only experiencing this problem, read this:
>>>http://kerneltrap.org/node/view/1844
>>>
>>>
>>A buglet in kmail was tripped up by some optimisations which went into
>>reiserfs.
>>
>>Upgrading kmail should fix it up. Or mount the reiserfs filesystems with
>>the `nolargeio=1' mount option.
>>
>>
>
>Actually, we've hit other problems with v3 largeio, it can confuse rpm
>badly. The real bug is apparently in bdb, the larger io size suggested
>by the filesystem lead bdb to corrupt its own files. I spent some time
>neck deep in the db code but couldn't track the problem down.
>
>I seem to remember the XFS folks hitting exactly the same bug.
>
>Hans, can I talk you into having v3 export an io size of 4k to userspace
>again? Applications that send large ios would still use Oleg's
>optimized file write paths.
>
>-chris
>
>
>
>
>
>
why is it you don't want to "fix" bdb to lie to itself about the result
of statfs?
--
Hans
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kmail slowdown on 2.6.* +reiserFS (v3)
2004-01-14 13:32 ` Hans Reiser
@ 2004-01-14 13:42 ` Chris Mason
0 siblings, 0 replies; 6+ messages in thread
From: Chris Mason @ 2004-01-14 13:42 UTC (permalink / raw)
To: Hans Reiser; +Cc: Andrew Morton, linux-kernel, reiserfs-dev
On Wed, 2004-01-14 at 08:32, Hans Reiser wrote:
> Chris Mason wrote:
>
> >On Sun, 2004-01-11 at 21:27, Andrew Morton wrote:
> >
> >
> >>Ciaby <ciaby@autistici.org> wrote:
> >>
> >>
> >>>I all!
> >>>I've recently upgraded from 2.4 to 2.6 and I've noticed a strange thing:
> >>>on the 2.4 kernel, kmail run decently (i've an old k6-200).
> >>>On the 2.6 kernel, kmail slowdown and take a very long time to read a mailbox.
> >>>I think something changed in the reiserFS during this time...
> >>>I'm not the only experiencing this problem, read this:
> >>>http://kerneltrap.org/node/view/1844
> >>>
> >>>
> >>A buglet in kmail was tripped up by some optimisations which went into
> >>reiserfs.
> >>
> >>Upgrading kmail should fix it up. Or mount the reiserfs filesystems with
> >>the `nolargeio=1' mount option.
> >>
> >>
> >
> >Actually, we've hit other problems with v3 largeio, it can confuse rpm
> >badly. The real bug is apparently in bdb, the larger io size suggested
> >by the filesystem lead bdb to corrupt its own files. I spent some time
> >neck deep in the db code but couldn't track the problem down.
> >
> >I seem to remember the XFS folks hitting exactly the same bug.
> >
> >Hans, can I talk you into having v3 export an io size of 4k to userspace
> >again? Applications that send large ios would still use Oleg's
> >optimized file write paths.
> >
> why is it you don't want to "fix" bdb to lie to itself about the result
> of statfs?
Because I'm worried that bdb isn't the only app having problems ;-) And
it's important enough as a legacy app that I don't want to tell everyone
they must upgrade to some hacked bdb version in order for v3 to work
under 2.6.x
-chris
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kmail slowdown on 2.6.* +reiserFS (v3)
@ 2004-01-12 13:18 Samium Gromoff
0 siblings, 0 replies; 6+ messages in thread
From: Samium Gromoff @ 2004-01-12 13:18 UTC (permalink / raw)
To: ciaby; +Cc: linux-kernel
> I all!
> I've recently upgraded from 2.4 to 2.6 and I've noticed a strange thing:
> on the 2.4 kernel, kmail run decently (i've an old k6-200).
> On the 2.6 kernel, kmail slowdown and take a very long time to read a mailbox.
> I think something changed in the reiserFS during this time...
> I'm not the only experiencing this problem, read this:
> http://kerneltrap.org/node/view/1844
> Please CC me if there's some reply.
> tnx all for the good work! :-)
How much RAM do you have?
This might be the 2.6 VM regression hitting you.
> Bye
> --
> -----> \|/Ciaby\|/ <------
> ! E-mail:ciaby@autistici.org !
> ! ICQ:59493039 !
> ! SpinHacker404 HackLab !
> ! www.ecn.org/sh404 !
> gpg --keyserver autistici.org --recv-key 42F3C487
regards, Samium Gromoff
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2004-01-14 13:40 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-01-11 20:09 kmail slowdown on 2.6.* +reiserFS (v3) Ciaby
2004-01-12 2:27 ` Andrew Morton
2004-01-14 13:20 ` Chris Mason
2004-01-14 13:32 ` Hans Reiser
2004-01-14 13:42 ` Chris Mason
2004-01-12 13:18 Samium Gromoff
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