Messages in this thread | | | From | Bruno Goncalves <> | Date | Tue, 27 Jul 2021 16:12:54 +0200 | Subject | Re: [PATCH v3 1/2] init/initramfs.c: do unpacking asynchronously |
| |
On Tue, Jul 27, 2021 at 3:55 PM Luis Chamberlain <mcgrof@kernel.org> wrote: > > On Tue, Jul 27, 2021 at 09:31:54AM +0200, Bruno Goncalves wrote: > > On Mon, Jul 26, 2021 at 1:46 PM Rasmus Villemoes > > <linux@rasmusvillemoes.dk> wrote: > > > > > > On 24/07/2021 09.46, Alexander Egorenkov wrote: > > > > Hello, > > > > > > > > since e7cb072eb988 ("init/initramfs.c: do unpacking asynchronously"), we > > > > started seeing the following problem on s390 arch regularly: > > > > > > > > [ 5.039734] wait_for_initramfs() called before rootfs_initcalls > > So some context here, which might help. > > The initramfs_cookie is initialized until a a rootfs_initcall() is > called, in this case populate_rootfs(). The code is small, so might > as well include it: > > static int __init populate_rootfs(void) > { > initramfs_cookie = async_schedule_domain(do_populate_rootfs, NULL, > &initramfs_domain); > if (!initramfs_async) > wait_for_initramfs(); > return 0; > } > rootfs_initcall(populate_rootfs); > > The warning you see comes from a situation where a wait_for_initramfs() > gets called but we haven't yet initialized initramfs_cookie. There are > only a few calls for wait_for_initramfs() in the kernel, and the only > thing I can think of is that somehow s390 may rely on a usermode helper > early on, but not every time. > > What umh calls does s390 issue? > > > Unfortunately, we haven't been able to find the root cause, but since > > June 23rd we haven't hit this panic... > > > > Btw, this panic we were hitting only when testing kernels from "scsi" > > and "block" trees. > > Do you use drdb maybe?
No, the machines we were able to reproduce the problem don't have drdb.
Bruno > > Luis >
| |