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authorChao Yu <yuchao0@huawei.com>2021-05-26 09:29:27 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2021-06-23 11:09:35 +0300
commit859fca6b706e005f7cf19aa2ce7bb4005bcef427 (patch)
treecf00ed68ef6b42d39c6a601988403b95b981f5d6 /fs/f2fs/node.h
parent0b8fc00601c0d8bea19667bbc66f00e13d954e4a (diff)
downloadlinux-859fca6b706e005f7cf19aa2ce7bb4005bcef427.tar.xz
f2fs: swap: support migrating swapfile in aligned write mode
This patch supports to migrate swapfile in aligned write mode during swapon in order to keep swapfile being aligned to section as much as possible, then pinned swapfile will locates fully filled section which may not affected by GC. However, for the case that swapfile's size is not aligned to section size, it will still leave last extent in file's tail as unaligned due to its size is smaller than section size, like case #2. case #1 xfs_io -f /mnt/f2fs/file -c "pwrite 0 4M" -c "fsync" Before swapon: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..3047]: 1123352..1126399 3048 0x1000 1: [3048..7143]: 237568..241663 4096 0x1000 2: [7144..8191]: 245760..246807 1048 0x1001 After swapon: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..8191]: 249856..258047 8192 0x1001 Kmsg: F2FS-fs (zram0): Swapfile (2) is not align to section: 1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(2097152 * n) case #2 xfs_io -f /mnt/f2fs/file -c "pwrite 0 3M" -c "fsync" Before swapon: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..3047]: 246808..249855 3048 0x1000 1: [3048..6143]: 237568..240663 3096 0x1001 After swapon: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..4095]: 258048..262143 4096 0x1000 1: [4096..6143]: 238616..240663 2048 0x1001 Kmsg: F2FS-fs (zram0): Swapfile: last extent is not aligned to section F2FS-fs (zram0): Swapfile (2) is not align to section: 1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(2097152 * n) Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/node.h')
-rw-r--r--fs/f2fs/node.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 84d45385d1f2..ff14a6e5ac1c 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -38,6 +38,9 @@
/* return value for read_node_page */
#define LOCKED_PAGE 1
+/* check pinned file's alignment status of physical blocks */
+#define FILE_NOT_ALIGNED 1
+
/* For flag in struct node_info */
enum {
IS_CHECKPOINTED, /* is it checkpointed before? */