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--- btrfs [2022/05/16 19:53]
65.108.0.71 old revision restored (2022/02/22 14:29)
+++ btrfs [2022/05/16 19:54] (current)
65.108.0.71 old revision restored (2022/02/23 14:49)
@@ Line 2: / Line 2: @@
 [[https://www.cyberciti.biz/faq/linux-btrfs-fstab-entry-to-mount-filesystem-at-startup/]]
+How to balance a btrfs (when running out of free space even when there is really free space)
+https://ohthehugemanatee.org/blog/2019/02/11/btrfs-out-of-space-emergency-response/
+===== finding out resume offset for swap hibernation in 32bit machine (i386) =====
+The code "btrfs_map_physical.c" for finding out the swap file offset for hibernation resume doesn't work on 32bits.
+Change:
+  	fd = open(argv[optind], O_RDONLY);
+For:
+	fd = open(argv[optind], O_RDONLY |O_LARGEFILE );
+and compile using the following command line:
+  gcc -O2 -o btrfs_map_physical -D_FILE_OFFSET_BITS=64 btrfs_map_physical.c

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