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authorJaegeuk Kim <jaegeuk@kernel.org>2014-10-06 16:11:16 -0700
committerJaegeuk Kim <jaegeuk@kernel.org>2014-10-07 11:54:41 -0700
commit02a1335f25a386db9afc68f8315162f862aac93f (patch)
treeedb3b2894dfb09f42cb45b6ad0f3d40c84a4dd7b /Documentation/filesystems
parent88b88a66797159949cec32eaab12b4968f6fae2d (diff)
f2fs: support volatile operations for transient data
This patch adds support for volatile writes which keep data pages in memory until f2fs_evict_inode is called by iput. For instance, we can use this feature for the sqlite database as follows. While supporting atomic writes for main database file, we can keep its journal data temporarily in the page cache by the following sequence. 1. open -> ioctl(F2FS_IOC_START_VOLATILE_WRITE); 2. writes : keep all the data in the page cache. 3. flush to the database file with atomic writes a. ioctl(F2FS_IOC_START_ATOMIC_WRITE); b. writes c. ioctl(F2FS_IOC_COMMIT_ATOMIC_WRITE); 4. close -> drop the cached data Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'Documentation/filesystems')
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