On Wed, 25 Jun 2014, Wang Sheng-Hui wrote: > Patch to man-page. > > [PATCH] madvise.2: update the description for MADV_REMOVE > > Currently we have more filesystems supporting fallcate, e.g ext4/btrfs, > which can response to MADV_REMOVE gracefully. > > And if filesystems don't support fallocate, the return error would be > EOPNOTSUPP, instead of ENOSYS. > > Signed-off-by: Wang Sheng-Hui <shhuiw@xxxxxxxxx> Great, thanks! This looks like it can be applied immediately and doesn't require us to wait for any kernel change. Good catch with the return value. > --- > man2/madvise.2 | 10 +++------- > 1 file changed, 3 insertions(+), 7 deletions(-) > > diff --git a/man2/madvise.2 b/man2/madvise.2 > index 032ead7..4ce869c 100644 > --- a/man2/madvise.2 > +++ b/man2/madvise.2 > @@ -99,13 +99,9 @@ or zero-fill-on-demand pages for mappings > without an underlying file. > .TP > .BR MADV_REMOVE " (since Linux 2.6.16)" > -Free up a given range of pages > -and its associated backing store. > -Currently, > -.\" 2.6.18-rc5 > -only shmfs/tmpfs supports this; other filesystems return with the > -error > -.BR ENOSYS . > +Free up a given range of pages and its associated backing store. > +Filesystems that don't support fallocate will return error > +.BR EOPNOTSUPP. > .\" Databases want to use this feature to drop a section of their > .\" bufferpool (shared memory segments) - without writing back to > .\" disk/swap space. This feature is also useful for supporting -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>