Ran head-long into this on maverick's -6 kernel. dpkg just hung in the
middle of writes. I think we need to get
http://lkml.org/lkml/2010/6/10/175 in ASAP.
--
tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
You received this bug notification because you are a member of Ubuntu
Bugs,
The upstream devs have a second attempt at fixing the problem, which
supposedly fixes the hangs: http://lkml.org/lkml/2010/6/10/175
It hasn't been merged for 2.6.35 yet as of 2010-06-15.
--
tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
You received this bug notification because yo
Here's the discussion that let up to it being reverted:
http://kerneltrap.org/mailarchive/linux-fsdevel/2010/5/26/6885091
--
tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
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** Tags removed: kernel-candidate
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tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
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The patches referred to above have just been reverted in upstream as
they seem to introduce regressions including hangs.
--
tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
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** Tags added: kernel-candidate kernel-reviewed
** Tags removed: kernel-needs-review
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tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
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ubuntu-bugs
** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Tags added: kernel-fs kernel-needs-review patch
** Tags removed: needs-kernel-logs
--
tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
You received
** Patch added:
"0004-Revert-UBUNTU-SAUCE-sync-before-umount-to-reduce-tim.patch"
http://launchpadlibrarian.net/49092663/0004-Revert-UBUNTU-SAUCE-sync-before-umount-to-reduce-tim.patch
--
tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
You received this bug notification because
** Patch added:
"0003-writeback-ensure-that-WB_SYNC_NONE-writeback-with-sb.patch"
http://launchpadlibrarian.net/49092648/0003-writeback-ensure-that-WB_SYNC_NONE-writeback-with-sb.patch
--
tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
You received this bug notification because
** Patch added: "0002-writeback-Update-dirty-flags-in-two-steps.patch"
http://launchpadlibrarian.net/49092637/0002-writeback-Update-dirty-flags-in-two-steps.patch
--
tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
You received this bug notification because you are a member of Ub
** Patch added:
"0004-Revert-UBUNTU-SAUCE-sync-before-umount-to-reduce-tim.patch"
http://launchpadlibrarian.net/49092653/0004-Revert-UBUNTU-SAUCE-sync-before-umount-to-reduce-tim.patch
--
tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
You received this bug notification because
I took a crack at backporting the patches from the upstream buglink.
I cherrypicked the three patches I mentioned above, and reverted
http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-
lucid.git;a=commit;h=5e1941884c700b7b97bcad52c2d8212ac56a7ebc (the
workaround from 543617). The backports are attached
The slowdown is still present in the daily livecd as of today
(http://cdimage.ubuntu.com/daily-live/current/lucid-desktop-amd64.iso).
I've attached apport-collect info from that system.
--
tmpfs umount slowdown
https://bugs.launchpad.net/bugs/585092
You received this bug notification because you
apport information
** Tags added: apport-collected
** Description changed:
On a fresh lucid install, an unmount of an empty tmpfs mount is quite
slow:
# mkdir -p /tmp/test; mount -t tmpfs nodev /tmp/test; time umount /tmp/test
real0m0.318s
user0m0.000s
sys 0m0.020s
If
The problem does not exist the latest daily mainline release (I tested
201005231006).
The issue was fixed when the following three patches hit mainline:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e913fc825dc685a444cb4c1d0f9d32f372f59861
http://git.kernel.org/?p=lin
Hi Brian,
Please be sure to confirm this issue exists with the latest development release
of Ubuntu. ISO CD images are available from
http://cdimage.ubuntu.com/daily-live/current/ . If the issue remains, please
run the following command from a Terminal
(Applications->Accessories->Terminal).
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