On Fri, Jan 31, 2025 at 10:27:55PM +0000, Jaegeuk Kim wrote: > Note, let me keep improving this patch set, while trying to get some feedbacks > from MM and API folks from [1]. Please actually drive it instead of only interacting once after I told you to. The feedback is clearly that it is a MM thing, so please drive it forward instead of going back to the hacky file system version. > > If users clearly know which file-backed pages to reclaim in system view, they > can use this ioctl() to register in advance and reclaim all at once later. > > I'd like to propose this API in F2FS only, since > 1) the use-case is quite limited in Android at the moment. Once it's generall > accepted with more use-cases, happy to propose a generic API such as fadvise. > Please chime in, if there's any needs. > > 2) it's file-backed pages which requires to maintain the list of inode objects. > I'm not sure this fits in MM tho, also happy to listen to any feedback. > > [1] https://lore.kernel.org/lkml/Z4qmF2n2pzuHqad_@xxxxxxxxxx/ > > Change log from v7: > - change the sysfs entry to reclaim pages in all f2fs mounts > > Change log from v6: > - change sysfs entry name to reclaim_caches_kb > > Jaegeuk Kim (2): > f2fs: register inodes which is able to donate pages > f2fs: add a sysfs entry to request donate file-backed pages > > Jaegeuk Kim (2): > f2fs: register inodes which is able to donate pages > f2fs: add a sysfs entry to request donate file-backed pages > > Documentation/ABI/testing/sysfs-fs-f2fs | 7 ++ > fs/f2fs/debug.c | 3 + > fs/f2fs/f2fs.h | 14 +++- > fs/f2fs/file.c | 60 +++++++++++++++++ > fs/f2fs/inode.c | 14 ++++ > fs/f2fs/shrinker.c | 90 +++++++++++++++++++++++++ > fs/f2fs/super.c | 1 + > fs/f2fs/sysfs.c | 63 +++++++++++++++++ > include/uapi/linux/f2fs.h | 7 ++ > 9 files changed, 258 insertions(+), 1 deletion(-) > > -- > 2.48.1.362.g079036d154-goog > > ---end quoted text---
