[mythtv-users] IOBOUND errors after kernel upgrade from 2.6.31 to 2.6.32
digitalaudiorock at gmail.com
Tue Jan 18 17:31:16 UTC 2011
On Fri, Dec 24, 2010 at 6:45 PM, Tom Dexter <digitalaudiorock at gmail.com> wrote:
> On Tue, Apr 27, 2010 at 10:16 AM, Tom Dexter <digitalaudiorock at gmail.com> wrote:
>> On Tue, Apr 27, 2010 at 10:13 AM, Tom Dexter <digitalaudiorock at gmail.com> wrote:
>>> On Sunday I did various updates on my Gentoo frontend/backend systems.
>>> Once of them was an upgrade from the 2.6.31 kernel to
>>> 2.6.32...specifically sys-kernel/gentoo-sources-2.6.31-r6 to
>>> I noticed a few skips in some recorded programs last night, like there
>>> were small pieces missing. I discovered that over the two nights
>>> since that upgrade I've gotten several IOBOUND errors while recording.
>>> If I count just the "IOBOUND begin" messages I see 19 of them.
>>> I just unzipped all my old logs and can see that prior to that (all
>>> the way back to February) I've had non at all. There wasn't much of
>>> anything else involved in the upgrade that I would expect to cause
>>> those. I've rebooted the backend to the 2.6.31 kernel and will see
>>> how it goes tonight (I have a lot of recordings scheduled). That
>>> should tell me for sure whether or not the kernel is the issue.
>>> Is anyone aware of any new kernel settings that might affect
>>> this...scheduler changes etc??
>> I forgot to mention...I'm using EXT4 on my recording drive. I
>> converted from EXT3 at the beginning of March and that's been working
>> fine. Also, that's on an LVM2 volume.
> Just an update to this for anyone curious...
> Since this happened to me i periodically tried new kernels as they
> went stable under Gentoo but always had to revert to 2.6.31-r6 to
> prevent IOBOUND errors.
> I recently read parts of a discussion on kerneltrap.org that seemed to
> indicate that the EXT4 preformance regression introduced in 2.6.32 (as
> far as i can tell, actually in later versions of 2.6.31) was corrected
> in newer 2.6.35 kernels. I've now upgraded to 2.6.35-gentoo-r12 and
> knock on wood, it seems great so far. I've tried recording in all
> three tuners at once and had no problems.
Another interesting update: While 2.6.35-gentoo-r12 has been great, I
started getting some IOBOUND errors after upgrading to
2.6.36-gentoo-r5, and reverted back to 2.6.35-gentoo-r12. I'm
guessing it may be related to this:
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