[f2fs-dev] [Bug 218096] New: first 4K all zeros when release_cblocks set, reserve_cblocks restores access

[f2fs-dev] [Bug 218096] New: first 4K all zeros when release_cblocks set, reserve_cblocks restores access

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=218096

            Bug ID: 218096
           Summary: first 4K all zeros when release_cblocks set,
                    reserve_cblocks restores access
           Product: File System
           Version: 2.5
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: f2fs
          Assignee: filesystem_f2fs@kernel-bugs.kernel.org
          Reporter: slandden@gmail.com
        Regression: No

Using 6.1.51 on armv7 when I release compressed blocks then the first page I
read from a file on the F2FS filesystem is all zeros.

f2fs_io release_cblocks <FILE>
hd <FILE> | head
(first 4K is all zero)
f2fs_io reserve_cblocks <FILE>
hd <FILE> | head
(first 4K now reads correctly)

I am having trouble reproducing this in a virtual machine however. This machine
has 3.5G/4G if that is somehow relevant.

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