From: Luis Chamberlain <mcgrof@kernel.org>
To: Petr Pavlu <petr.pavlu@suse.com>
Cc: Petr Mladek <pmladek@suse.com>,
Prarit Bhargava <prarit@redhat.com>,
Vegard Nossum <vegard.nossum@oracle.com>,
Borislav Petkov <bp@alien8.de>, NeilBrown <neilb@suse.de>,
Goldwyn Rodrigues <rgoldwyn@suse.com>,
david@redhat.com, mwilck@suse.com, linux-modules@vger.kernel.org,
linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH v2] module: Don't wait for GOING modules
Date: Wed, 18 Jan 2023 10:42:29 -0800 [thread overview]
Message-ID: <Y8g9lTBnCgB7g08/@bombadil.infradead.org> (raw)
In-Reply-To: <79aad139-5305-1081-8a84-42ef3763d4f4@suse.com>
On Wed, Jan 18, 2023 at 04:12:05PM +0100, Petr Pavlu wrote:
> On 1/18/23 01:04, Luis Chamberlain wrote:
> > The rationale for making a regression fix with a new userspace return value
> > is fair given the old fix made things even much worse the point some kernel
> > boots would fail. So the rationale to suggest we *must* short-cut
> > parallel loads as effectively as possible seems sensible *iff* that
> > could not make things worse too but sadly I've found an isssue
> > proactively with this fix, or at least that this issue is also not fixed:
> >
> > ./tools/testing/selftests/kmod/kmod.sh -t 0006
> > Tue Jan 17 23:18:13 UTC 2023
> > Running test: kmod_test_0006 - run #0
> > kmod_test_0006: OK! - loading kmod test
> > kmod_test_0006: FAIL, test expects SUCCESS (0) - got -EINVAL (-22)
> > ----------------------------------------------------
> > Custom trigger configuration for: test_kmod0
> > Number of threads: 50
> > Test_case: TEST_KMOD_FS_TYPE (2)
> > driver: test_module
> > fs: xfs
> > ----------------------------------------------------
> > Test completed
> >
> > When can multiple get_fs_type() calls be issued on a system? When
> > mounting a large number of filesystems. Sadly though this issue seems
> > to have gone unnoticed for a while now. Even reverting commit
> > 6e6de3dee51a doesn't fix it, and I've run into issues with trying
> > to bisect, first due to missing Kees' patch which fixes a compiler
> > failure on older kernel [0] and now I'm seeing this while trying to
> > build v5.1:
> >
> > ld: arch/x86/boot/compressed/pgtable_64.o:(.bss+0x0): multiple definition of `__force_order';
> > arch/x86/boot/compressed/kaslr_64.o:(.bss+0x0): first defined here
> > ld: warning: arch/x86/boot/compressed/efi_thunk_64.o: missing .note.GNU-stack section implies executable stack
> > ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
> > ld: arch/x86/boot/compressed/head_64.o: warning: relocation in read-only section `.head.text'
> > ld: warning: arch/x86/boot/compressed/vmlinux has a LOAD segment with RWX permissions
> > ld: warning: creating DT_TEXTREL in a PIE
> > make[2]: *** [arch/x86/boot/compressed/Makefile:118: arch/x86/boot/compressed/vmlinux] Error 1
> > make[1]: *** [arch/x86/boot/Makefile:112: arch/x86/boot/compressed/vmlinux] Error 2
> > make: *** [arch/x86/Makefile:283: bzImage] Error 2
> >
> > [0] http://lore.kernel.org/lkml/20220213182443.4037039-1-keescook@chromium.org
> >
> > But we should try to bisect to see what cauased the above kmod test 0006
> > to start failing.
>
> It is not clear to me from your description if the observed failure of
> kmod_test_0006 is related to the fix in this thread.
The issue happens with and without the patch in this thread, I'd just hate to
exacerbate the issue further.
> The problem was not possible for me to reproduce on my system. My test was on
> an 8-CPU x86_64 machine using v6.2-rc4 with "defconfig + kvm_guest.config +
> tools/testing/selftests/kmod/config".
With the patch?
> Could you perhaps trace the test to determine where the EINVAL value comes
> from?
Sure, it'll take a bit.
Luis
next prev parent reply other threads:[~2023-01-18 18:42 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-05 10:35 [PATCH v2] module: Don't wait for GOING modules Petr Pavlu
2022-12-05 19:54 ` Petr Mladek
2022-12-06 16:57 ` Petr Pavlu
2022-12-07 15:15 ` Petr Mladek
2022-12-08 2:44 ` Luis Chamberlain
2022-12-12 11:29 ` Petr Pavlu
2022-12-13 2:58 ` Luis Chamberlain
2022-12-13 5:09 ` Luis Chamberlain
2022-12-13 10:17 ` Petr Mladek
2022-12-13 13:36 ` Petr Pavlu
2023-01-18 0:04 ` Luis Chamberlain
2023-01-18 0:18 ` Luis Chamberlain
2023-01-18 15:12 ` Petr Pavlu
2023-01-18 18:42 ` Luis Chamberlain [this message]
2023-01-19 12:26 ` Petr Pavlu
2023-01-19 15:47 ` Petr Mladek
2023-01-20 0:51 ` Luis Chamberlain
2023-01-20 0:58 ` Luis Chamberlain
2023-01-21 22:40 ` Luis Chamberlain
2023-03-11 21:36 ` Luis Chamberlain
2023-03-12 6:25 ` Lucas De Marchi
2023-03-22 22:31 ` Luis Chamberlain
2023-03-23 15:01 ` Lucas De Marchi
2023-03-23 15:08 ` Luis Chamberlain
2023-03-24 6:03 ` Lucas De Marchi
2023-03-24 18:47 ` Luis Chamberlain
2023-01-24 19:58 ` Luis Chamberlain
2023-01-18 20:02 ` Borislav Petkov
2023-01-19 1:23 ` Luis Chamberlain
2023-01-19 23:37 ` Luis Chamberlain
2023-01-19 1:15 ` Lucas De Marchi
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