Revision 56ee254d23c59fd48fb6f192d79858f60cfe2bf6 authored by David Sterba on 27 October 2021, 08:42:27 UTC, committed by David Sterba on 29 October 2021, 11:02:50 UTC
This reverts commit bbaf9715f3f5b5ff0de71da91fcc34ee9c198ed8. The kmaps in compression code are still needed and cause crashes on 32bit machines (ARM, x86). Reproducible eg. by running fstest btrfs/004 with enabled LZO or ZSTD compression. Example stacktrace with ZSTD on a 32bit ARM machine: Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = c4159ed3 [00000000] *pgd=00000000 Internal error: Oops: 5 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 210 Comm: kworker/u2:3 Not tainted 5.14.0-rc79+ #12 Hardware name: Allwinner sun4i/sun5i Families Workqueue: btrfs-delalloc btrfs_work_helper PC is at mmiocpy+0x48/0x330 LR is at ZSTD_compressStream_generic+0x15c/0x28c (mmiocpy) from [<c0629648>] (ZSTD_compressStream_generic+0x15c/0x28c) (ZSTD_compressStream_generic) from [<c06297dc>] (ZSTD_compressStream+0x64/0xa0) (ZSTD_compressStream) from [<c049444c>] (zstd_compress_pages+0x170/0x488) (zstd_compress_pages) from [<c0496798>] (btrfs_compress_pages+0x124/0x12c) (btrfs_compress_pages) from [<c043c068>] (compress_file_range+0x3c0/0x834) (compress_file_range) from [<c043c4ec>] (async_cow_start+0x10/0x28) (async_cow_start) from [<c0475c3c>] (btrfs_work_helper+0x100/0x230) (btrfs_work_helper) from [<c014ef68>] (process_one_work+0x1b4/0x418) (process_one_work) from [<c014f210>] (worker_thread+0x44/0x524) (worker_thread) from [<c0156aa4>] (kthread+0x180/0x1b0) (kthread) from [<c0100150>] Link: https://lore.kernel.org/all/CAJCQCtT+OuemovPO7GZk8Y8=qtOObr0XTDp8jh4OHD6y84AFxw@mail.gmail.com/ Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=214839 Signed-off-by: David Sterba <dsterba@suse.com>
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| File | Mode | Size |
|---|---|---|
| Documentation | ||
| arch | ||
| bench | ||
| examples | ||
| include | ||
| jvmti | ||
| pmu-events | ||
| python | ||
| scripts | ||
| tests | ||
| trace | ||
| ui | ||
| util | ||
| .gitignore | -rw-r--r-- | 577 bytes |
| Build | -rw-r--r-- | 1.6 KB |
| CREDITS | -rw-r--r-- | 603 bytes |
| MANIFEST | -rw-r--r-- | 421 bytes |
| Makefile | -rw-r--r-- | 2.7 KB |
| Makefile.config | -rw-r--r-- | 36.6 KB |
| Makefile.perf | -rw-r--r-- | 39.5 KB |
| builtin-annotate.c | -rw-r--r-- | 17.5 KB |
| builtin-bench.c | -rw-r--r-- | 8.1 KB |
| builtin-buildid-cache.c | -rw-r--r-- | 12.8 KB |
| builtin-buildid-list.c | -rw-r--r-- | 3.2 KB |
| builtin-c2c.c | -rw-r--r-- | 71.4 KB |
| builtin-config.c | -rw-r--r-- | 5.7 KB |
| builtin-daemon.c | -rw-r--r-- | 31.0 KB |
| builtin-data.c | -rw-r--r-- | 3.2 KB |
| builtin-diff.c | -rw-r--r-- | 46.0 KB |
| builtin-evlist.c | -rw-r--r-- | 2.5 KB |
| builtin-ftrace.c | -rw-r--r-- | 21.7 KB |
| builtin-help.c | -rw-r--r-- | 11.7 KB |
| builtin-inject.c | -rw-r--r-- | 28.0 KB |
| builtin-kallsyms.c | -rw-r--r-- | 1.7 KB |
| builtin-kmem.c | -rw-r--r-- | 45.6 KB |
| builtin-kvm.c | -rw-r--r-- | 38.1 KB |
| builtin-list.c | -rw-r--r-- | 4.0 KB |
| builtin-lock.c | -rw-r--r-- | 23.1 KB |
| builtin-mem.c | -rw-r--r-- | 11.6 KB |
| builtin-probe.c | -rw-r--r-- | 18.9 KB |
| builtin-record.c | -rw-r--r-- | 78.1 KB |
| builtin-report.c | -rw-r--r-- | 46.3 KB |
| builtin-sched.c | -rw-r--r-- | 89.7 KB |
| builtin-script.c | -rw-r--r-- | 108.6 KB |
| builtin-stat.c | -rw-r--r-- | 69.2 KB |
| builtin-timechart.c | -rw-r--r-- | 46.5 KB |
| builtin-top.c | -rw-r--r-- | 47.4 KB |
| builtin-trace.c | -rw-r--r-- | 146.2 KB |
| builtin-version.c | -rw-r--r-- | 2.3 KB |
| builtin.h | -rw-r--r-- | 1.6 KB |
| check-headers.sh | -rwxr-xr-x | 4.9 KB |
| command-list.txt | -rw-r--r-- | 1.1 KB |
| design.txt | -rw-r--r-- | 17.5 KB |
| perf-archive.sh | -rw-r--r-- | 1.2 KB |
| perf-completion.sh | -rw-r--r-- | 6.2 KB |
| perf-iostat.sh | -rw-r--r-- | 290 bytes |
| perf-read-vdso.c | -rw-r--r-- | 547 bytes |
| perf-sys.h | -rw-r--r-- | 452 bytes |
| perf-with-kcore.sh | -rw-r--r-- | 6.2 KB |
| perf.c | -rw-r--r-- | 12.7 KB |
| perf.h | -rw-r--r-- | 450 bytes |
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