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| Filename | Latest commit message | Latest commit date |
|---|---|---|
96987eea53
We need to make sure we have no outstanding COW blocks before we swap extents, as there is nothing preventing us from having preallocated COW delalloc on either inode that swapext is called on. That case can easily be reproduced by running generic/324 in always_cow mode: [ 620.760572] XFS: Assertion failed: tip->i_delayed_blks == 0, file: fs/xfs/xfs_bmap_util.c, line: 1669 [ 620.761608] ------------[ cut here ]------------ [ 620.762171] kernel BUG at fs/xfs/xfs_message.c:102! [ 620.762732] invalid opcode: 0000 [#1] SMP PTI [ 620.763272] CPU: 0 PID: 24153 Comm: xfs_fsr Tainted: G W 4.19.0-rc1+ #4182 [ 620.764203] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.1-1 04/01/2014 [ 620.765202] RIP: 0010:assfail+0x20/0x28 [ 620.765646] Code: 31 ff e8 83 fc ff ff 0f 0b c3 48 89 f1 41 89 d0 48 c7 c6 48 ca 8d 82 48 89 fa 38 [ 620.767758] RSP: 0018:ffffc9000898bc10 EFLAGS: 00010202 [ 620.768359] RAX: 0000000000000000 RBX: ffff88012f14ba40 RCX: 0000000000000000 [ 620.769174] RDX: 00000000ffffffc0 RSI: 000000000000000a RDI: ffffffff828560d9 [ 620.769982] RBP: ffff88012f14b300 R08: 0000000000000000 R09: 0000000000000000 [ 620.770788] R10: 000000000000000a R11: f000000000000000 R12: ffffc9000898bc98 [ 620.771638] R13: ffffc9000898bc9c R14: ffff880130b5e2b8 R15: ffff88012a1fa2a8 [ 620.772504] FS: 00007fdc36e0fbc0(0000) GS:ffff88013ba00000(0000) knlGS:0000000000000000 [ 620.773475] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 620.774168] CR2: 00007fdc3604d000 CR3: 0000000132afc000 CR4: 00000000000006f0 [ 620.774978] Call Trace: [ 620.775274] xfs_swap_extent_forks+0x2a0/0x2e0 [ 620.775792] xfs_swap_extents+0x38b/0xab0 [ 620.776256] xfs_ioc_swapext+0x121/0x140 [ 620.776709] xfs_file_ioctl+0x328/0xc90 [ 620.777154] ? rcu_read_lock_sched_held+0x50/0x60 [ 620.777694] ? xfs_iunlock+0x233/0x260 [ 620.778127] ? xfs_setattr_nonsize+0x3be/0x6a0 [ 620.778647] do_vfs_ioctl+0x9d/0x680 [ 620.779071] ? ksys_fchown+0x47/0x80 [ 620.779552] ksys_ioctl+0x35/0x70 [ 620.780040] __x64_sys_ioctl+0x11/0x20 [ 620.780530] do_syscall_64+0x4b/0x190 [ 620.780927] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 620.781467] RIP: 0033:0x7fdc364d0f07 [ 620.781900] Code: b3 66 90 48 8b 05 81 5f 2c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 28 [ 620.784044] RSP: 002b:00007ffe2a766038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 620.784896] RAX: ffffffffffffffda RBX: 0000000000000025 RCX: 00007fdc364d0f07 [ 620.785667] RDX: 0000560296ca2fc0 RSI: 00000000c0c0586d RDI: 0000000000000005 [ 620.786398] RBP: 0000000000000025 R08: 0000000000001200 R09: 0000000000000000 [ 620.787283] R10: 0000000000000432 R11: 0000000000000246 R12: 0000000000000005 [ 620.788051] R13: 0000000000000000 R14: 0000000000001000 R15: 0000000000000006 [ 620.788927] Modules linked in: [ 620.789340] ---[ end trace 9503b7417ffdbdb0 ]--- [ 620.790065] RIP: 0010:assfail+0x20/0x28 [ 620.790642] Code: 31 ff e8 83 fc ff ff 0f 0b c3 48 89 f1 41 89 d0 48 c7 c6 48 ca 8d 82 48 89 fa 38 [ 620.793038] RSP: 0018:ffffc9000898bc10 EFLAGS: 00010202 [ 620.793609] RAX: 0000000000000000 RBX: ffff88012f14ba40 RCX: 0000000000000000 [ 620.794317] RDX: 00000000ffffffc0 RSI: 000000000000000a RDI: ffffffff828560d9 [ 620.795025] RBP: ffff88012f14b300 R08: 0000000000000000 R09: 0000000000000000 [ 620.795778] R10: 000000000000000a R11: f000000000000000 R12: ffffc9000898bc98 [ 620.796675] R13: ffffc9000898bc9c R14: ffff880130b5e2b8 R15: ffff88012a1fa2a8 [ 620.797782] FS: 00007fdc36e0fbc0(0000) GS:ffff88013ba00000(0000) knlGS:0000000000000000 [ 620.798908] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 620.799594] CR2: 00007fdc3604d000 CR3: 0000000132afc000 CR4: 00000000000006f0 [ 620.800424] Kernel panic - not syncing: Fatal exception [ 620.801191] Kernel Offset: disabled [ 620.801597] ---[ end Kernel panic - not syncing: Fatal exception ]--- Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.