Thanks so much Darrick and Ted!
You guys have been a lot of help. I really appreciate it.
On Sat 31 Jan 2015 06:37:23 PM PST, Theodore Ts'o wrote:
On Wed, Jan 28, 2015 at 03:57:05PM -0800, Darrick J. Wong wrote:
Yes, that wait_for_page_writeback() was replaced with a call to
wait_for_stable_page() upstream, so it'll probably work for your 3.10
kernel.
(I also wonder why not jump to a newer LTS kernel, but that's neither
here nor there.)
Nikhilesh said that he was using a 64-bit android device. I'm going
to guess it is based off of the AOSP kernel for the Nexus 9, which is
a 64-bit android device that uses 3.10 as a base. It's not *really* a
3.10 kernel, though, becausre it looks like bits and pieces of the VFS
was forward ported to a somewhat newer version so they could backport
F2FS to the Nexus 9 kernel. But I'm guessing he's using it because
there are device drivers he needs that might not be available without
a lot of forward-porting work on a newer kernel.
Yes we cant really move to a newer kernel just yet. :)
If you are interested in trying to use a somewhat newer version of
ext4, I just *happen* to have a backport of the 3.18 version of ext4
on top of a stock version of 3.10. You can find it at the
backport-to-3.10 branch of the ext4.git tree on git.kernel.org.
Thanks that is awesome... yes...Will look into them.Thanks!
If you are starting from the AOSP version of the Nexus 9 kernel, the
patch series from that branch won't apply 100% cleanly, because of the
changes resulting from the F2FS backport. It's relatively
straight-forward though to use the backport-to-3.10 patch series as a
model to get a version of 3.18 ext4 on top of the AOSP kernel, though;
it's mostly dropping or reworking patches that were no longer
necessary thanks to the F2FS backport.
If there is interest, I can look into what might be involved in making
a git repo of an AOSP kernel with the 3.18 ext4 code backported to it
available.
I won't give any warrantees, of course, since the AOSP kernel doesn't
build on x86 and so I can't easily run regression tests on it. So if
it breaks, you will get to keep both pieces. I will try to at least
look at bug reports, though, and I can say that 3.18 backport on the
stock 3.10 kernel survives xfstests much better than the 3.10 version
of ext4, since a modern xfstests very quickly caused the stock 3.10
kernel to panic. :-)
- Ted
Yes I can run testing on my end to make sure everything is good.
Thanks So much once again.
--
Thanks
Nikhilesh Reddy
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.
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