Bug #1102
closed
Sqlite hangs on fsync on Hammer partition
0%
Description
Hi,
I've a little program that uses the Sqlite database. After it calls
seven times fsync (sometimes only twice), the whole process blocks. The
process cannot be killed (-9) anymore, and when I change into the
directory where I executed the program and do a "ls", I'm blocked as
well.
When I execute the same program on a UFS partition, it doesn't hang. So
it seems to be a Hammer-related issue.
According to ktrace/kdump, it hangs on fsync.
I'm now creating a core-dump and uploading it.
Regards,
Michael
Updated by bastyaelvtars over 15 years ago
On Fri, 01 Aug 2008 23:08:38 +0200
Michael Neumann <mneumann@ntecs.de> wrote:
That's kinda the same error I get with mtn (it also uses SQLite). Any
firefox3 hangs?
Updated by kylebutt over 15 years ago
firefox uses sqlite internally, and firefox 3 moved more things into sqlite.
Kyle
Updated by mneumann over 15 years ago
Indeed, I get some rare firefox3 hangs. But it's not something easily
reproducable (it takes a few hours).
Regards,
Michael
Updated by dillon over 15 years ago
Michael, that vmcore.4 on leaf is not a patched kernel. I disassembled
one of the routines that was patched and it didn't have the extra flag
I had added.
In anycase, I am MFCing all the HAMMER work to 2.0 today.-Matt
Matthew Dillon
<dillon@backplane.com>
Updated by dillon over 15 years ago
: Michael, that vmcore.4 on leaf is not a patched kernel. I disassembled
: one of the routines that was patched and it didn't have the extra flag
: I had added.
:
: In anycase, I am MFCing all the HAMMER work to 2.0 today.
Wait, I take it back. I was looking at the wrong bit of code.
It does have the patch.Ok, I'm looking at the core!-Matt
Matthew Dillon
<dillon@backplane.com>
Updated by dillon over 15 years ago
Ok, please try this patch folks:
fetch http://apollo.backplane.com/DFlyMisc/hammer03.patchI think that catches all the cases. If not, Michael, please upload
another core to leaf.I will commit this and MFC the whole mess to 2.0 a bit later today.-Matt
Updated by bastyaelvtars over 15 years ago
On Sat, 2 Aug 2008 08:19:18 -0700 (PDT)
Matthew Dillon <dillon@apollo.backplane.com> wrote:
It does not help here. However, I'm able to create dumps again (thanks
to you), so I'll make a dump available soon.
Updated by bastyaelvtars over 15 years ago
Updated by dillon over 15 years ago
:http://medica.semi.szote.u-szeged.hu/~szg/crash080802.tar.bz2
:
Ok, try this patch Gergo (relative to HEAD):fetch http://apollo.backplane.com/DFlyMisc/hammer04.patchThis is the patch relative to an unpatched 2.0:fetch http://apollo.backplane.com/DFlyMisc/hammer04_20.patch-Matt
Matthew Dillon
<dillon@backplane.com>
Updated by bastyaelvtars over 15 years ago
On Sat, 2 Aug 2008 10:27:04 -0700 (PDT)
Matthew Dillon <dillon@apollo.backplane.com> wrote:
OK, it seems to work now, at least I could not make it hang with the
above command, even though I am creating hundreds of databases
sequentially. I have even tried in two separate volumes.
Thanks for the fix!