On Thu, Sep 27, 2018 at 11:17:32AM -0700, Omar Sandoval wrote: > From: Omar Sandoval <osandov@xxxxxx> > This series implements swap file support for Btrfs. > > Changes from v8 [1]: > > - Fixed a bug in btrfs_swap_activate() which would cause us to miss some > file extents if they were merged into one extent map entry. > - Fixed build for !CONFIG_SWAP. > - Changed all error messages to KERN_WARN. > - Unindented long error messages. > > I've Cc'd Jon and Al on patch 3 this time, so hopefully we can get an > ack for that one, too. > > Thanks! > > 1: https://www.spinics.net/lists/linux-btrfs/msg82267.html > > Omar Sandoval (6): > mm: split SWP_FILE into SWP_ACTIVATED and SWP_FS > mm: export add_swap_extent() > vfs: update swap_{,de}activate documentation > Btrfs: prevent ioctls from interfering with a swap file > Btrfs: rename get_chunk_map() and make it non-static > Btrfs: support swap files fstest generic/472 reports an assertion failure. This is on the updated fstests git (70c4067285b0bc076), though it should not matter: [16597.002190] assertion failed: IS_ALIGNED(start, fs_info->sectorsize) && IS_ALIGNED(end + 1, fs_info->sectorsize), file: fs/btrfs/file-item.c, line: 319 [16597.016154] ------------[ cut here ]------------ [16597.020911] kernel BUG at fs/btrfs/ctree.h:3448! [16597.025692] invalid opcode: 0000 [#1] PREEMPT SMP [16597.030540] CPU: 1 PID: 2216 Comm: swapon Tainted: G W 4.19.0-1.ge195904-vanilla+ #343 [16597.030542] Hardware name: empty empty/S3993, BIOS PAQEX0-3 02/24/2008 [16597.030617] RIP: 0010:btrfs_lookup_csums_range+0x3ee/0x6e0 [btrfs] [16597.030623] RSP: 0018:ffff959a8210fc00 EFLAGS: 00010286 [16597.030626] RAX: 000000000000008b RBX: ffff959a8210fc40 RCX: 0000000000000000 [16597.030628] RDX: 0000000000000000 RSI: ffff89c766fd60a8 RDI: ffff89c766fd60a8 [16597.030630] RBP: 0000000000f10000 R08: 0000000000000001 R09: 0000000000000000 [16597.030631] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [16597.030633] R13: ffff89c74f47c000 R14: 0000000000000000 R15: 0000000000003e4f [16597.030635] FS: 00007f3d80a18700(0000) GS:ffff89c766e00000(0000) knlGS:0000000000000000 [16597.030637] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [16597.030639] CR2: 00007f3d7fa733b0 CR3: 000000021e0b5000 CR4: 00000000000006e0 [16597.030640] Call Trace: [16597.030657] ? __mutex_unlock_slowpath+0x4b/0x2b0 [16597.142625] ? btrfs_cross_ref_exist+0x6d/0xa0 [btrfs] [16597.142674] csum_exist_in_range+0x43/0xc2 [btrfs] [16597.152938] can_nocow_extent+0x442/0x4a0 [btrfs] [16597.152993] btrfs_swap_activate+0x19f/0x680 [btrfs] [16597.162947] __do_sys_swapon+0xdf8/0x1550 [16597.162965] do_syscall_64+0x5c/0x1b0 [16597.162971] entry_SYSCALL_64_after_hwframe+0x49/0xbe [16597.162974] RIP: 0033:0x7f3d7fb1f067 [16597.198875] RSP: 002b:00007ffcf9c49808 EFLAGS: 00000202 ORIG_RAX: 00000000000000a7 [16597.198877] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3d7fb1f067 [16597.198879] RDX: 00007ffcf9c49910 RSI: 0000000000000000 RDI: 00007ffcf9c4a8f0 [16597.198884] RBP: 0000000000000000 R08: 00007f3d7fdd8c40 R09: 00007f3d8081dfc0 [16597.228520] R10: 000000001cc0c4fd R11: 0000000000000202 R12: 00000000004006a0 [16597.228522] R13: 00007ffcf9c498f0 R14: 0000000000000000 R15: 0000000000000000 [16597.311530] ---[ end trace f4dc8cabefc3e36d ]--- [16597.316318] RIP: 0010:btrfs_lookup_csums_range+0x3ee/0x6e0 [btrfs] [16597.341828] RSP: 0018:ffff959a8210fc00 EFLAGS: 00010286 [16597.341834] RAX: 000000000000008b RBX: ffff959a8210fc40 RCX: 0000000000000000 [16597.354588] RDX: 0000000000000000 RSI: ffff89c766fd60a8 RDI: ffff89c766fd60a8 [16597.354590] RBP: 0000000000f10000 R08: 0000000000000001 R09: 0000000000000000 [16597.354592] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [16597.354593] R13: ffff89c74f47c000 R14: 0000000000000000 R15: 0000000000003e4f [16597.354595] FS: 00007f3d80a18700(0000) GS:ffff89c766e00000(0000) knlGS:0000000000000000 [16597.354596] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [16597.354598] CR2: 00007f3d7fa733b0 CR3: 000000021e0b5000 CR4: 00000000000006e0
