Messages in this thread | | | Subject | Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" | From | Toshi Kani <> | Date | Tue, 08 Mar 2016 09:13:48 -0700 |
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On Mon, 2016-03-07 at 22:16 -0500, Paul Gortmaker wrote: > [Re: runtime regression with "x86/mm/pat: Emulate PAT when it is > disabled"] On 07/03/2016 (Mon 17:56) Toshi Kani wrote: > > [..] > > > > > > It may have seemed working before, but you did not have WC > > > > configured > > > > to PAT without calling pat_init(). There was not a proper check in > > > > place to detect this error before. Can you please check your code > > > > to > > > > see what caused this skip of pat_init()? If you have a git tree, I > > > > can > > > > take a look as well. > > > > > > You already have git copies of what I'm running, since it is vanilla > > > mainline commits. No code changes at this end whatsoever. I did the > > > bisect on vanilla mainline. All I took from yocto was their > > > ".config" > > > > > > To recap, v4.1-rc5-21-g9dac62909451 works, v4.1-rc5-22-g9cd25aac1f44 > > > fails, and v4.5-rc6 also fails. If pat_init() isn't called then this > > > is a bug in current mainline. I'll have a look later myself and see > > > if I can trace out how we expect to get to pat_init() and how that > > > might be skipped inadvertently unless someone beats me to it. > > > > Oh, I see. Can you send me the ".config" file? > > I packaged the .config file for every bisect point in the original > reproducer tarball. Let me know if you can't find them. It should > look like this: > > paul@dell760-paul:~/qemu-fail$ ls -al 00-configs/ > total 92 > drwxrwxr-x 23 paul paul 4096 Mar 3 10:59 . > drwxrwxr-x 5 paul paul 4096 Mar 3 11:01 .. > -rw-rw-r-- 1 paul paul 0 Mar 3 10:59 00-all-dot-configs-are-in-here > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-1281-g43224b96af31 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-1625-g44d21c3f3a2e > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-3251-g4e241557fc1c > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-6547-g4570a37169d4 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-912-ge75c73ad6447 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-rc4-85-gd4688bdc6335 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-rc5-21-g9dac62909451 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-rc5-22-g9cd25aac1f44 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-rc5-23-g7202fdb1b329 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-rc5-27-gd838270e2516 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-rc5-35-g7ea402d01cb6 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-rc6-256-g9dda1658a9bd > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.1-rc6-296-g7ef3d7d58d9d > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.2 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.2-rc1 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.3 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.4 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.4.1 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.4.1-348-g0194c7658611 > drwxrwxr-x 2 paul paul 4096 Mar 3 10:59 v4.5-rc6 > paul@dell760-paul:~/qemu-fail$ > > Please check if they are present in the reproducer you downloaded. > Maybe somehow I uploaded a version without the config files.
Yes, I have these directories, but I do not see anything under them... Now that I do not think there is anything unique in your .config file, but it'd be still good to check. Please send me .config file for v4.5-rc6 (if you do not have it now, .config for other ver is OK as well).
$ ls -Rl .: total 84 -rw-rw-r--. 1 toshi toshi 0 Mar 3 08:59 00-all-dot-configs-are-in-here drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-1281-g43224b96af31 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-1625-g44d21c3f3a2e drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-3251-g4e241557fc1c drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-6547-g4570a37169d4 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-912-ge75c73ad6447 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-rc4-85-gd4688bdc6335 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-rc5-21-g9dac62909451 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-rc5-22-g9cd25aac1f44 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-rc5-23-g7202fdb1b329 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-rc5-27-gd838270e2516 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-rc5-35-g7ea402d01cb6 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-rc6-256-g9dda1658a9bd drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.1-rc6-296-g7ef3d7d58d9d drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.2 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.2-rc1 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.3 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.4 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.4.1 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.4.1-348-g0194c7658611 drwxrwxr-x. 2 toshi toshi 4096 Mar 3 08:59 v4.5-rc6
./v4.1: total 0
./v4.1-1281-g43224b96af31: total 0
./v4.1-1625-g44d21c3f3a2e: total 0
./v4.1-3251-g4e241557fc1c: total 0 ./v4.1-6547-g4570a37169d4: total 0
./v4.1-912-ge75c73ad6447: total 0
./v4.1-rc4-85-gd4688bdc6335: total 0
./v4.1-rc5-21-g9dac62909451: total 0
./v4.1-rc5-22-g9cd25aac1f44: total 0
./v4.1-rc5-23-g7202fdb1b329: total 0
./v4.1-rc5-27-gd838270e2516: total 0 ./v4.1-rc5-35-g7ea402d01cb6: total 0
./v4.1-rc6-256-g9dda1658a9bd: total 0
./v4.1-rc6-296-g7ef3d7d58d9d: total 0
./v4.2: total 0
./v4.2-rc1: total 0
./v4.3: total 0
./v4.4: total 0 ./v4.4.1: total 0
./v4.4.1-348-g0194c7658611: total 0
./v4.5-rc6: total 0
Thanks, -Toshi
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