From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Chaloupka Subject: Re: [PATCH] madvise.2: madvise(, , MADV_REMOVE) supports ext4, ocfs2 and xfs as well Date: Mon, 13 Oct 2014 10:24:16 +0200 Message-ID: <543B8C30.2070007@redhat.com> References: <20141007140337.10571.62743.stgit@unused-4-157.brq.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20141007140337.10571.62743.stgit-/v0jm+aXwyk2pP1PFFXgSPXAX3CI6PSWQQ4Iyu8u01E@public.gmane.org> Sender: linux-man-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Cc: linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org List-Id: linux-man@vger.kernel.org ping On 10/07/2014 04:03 PM, Jan Chaloupka wrote: > As from upstream commit: > > commit 3f31d07571eeea18a7d34db9af21d2285b807a17 > Author: Hugh Dickins > Date: Tue May 29 15:06:40 2012 -0700 > > mm/fs: route MADV_REMOVE to FALLOC_FL_PUNCH_HOLE > > Now tmpfs supports hole-punching via fallocate(), switch madvise_remove() > to use do_fallocate() instead of vmtruncate_range(): which extends > madvise(,,MADV_REMOVE) support from tmpfs to ext4, ocfs2 and xfs. > > madvise(,,MADV_REMOVE) support was extended by ext4, ocfs2 and xfs. > > bug report: https://bugzilla.redhat.com/show_bug.cgi?id=1120294 > > Justification from Rafael Aquini: > Well, that code is committed in kernel since v3.5 (2012) and it surely is > the expected behaviour since. It seems to me that madvise(2) man page text > for MADV_REMOVE just got out-of-date in that regard. > > This patch mentions this support in madvise.2 man page. > > Signed-off-by: Jan Chaloupka > --- > man2/madvise.2 | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/man2/madvise.2 b/man2/madvise.2 > index 032ead7..44698ec 100644 > --- a/man2/madvise.2 > +++ b/man2/madvise.2 > @@ -98,12 +98,12 @@ either in reloading of the memory contents from the underlying mapped file > or zero-fill-on-demand pages for mappings > without an underlying file. > .TP > -.BR MADV_REMOVE " (since Linux 2.6.16)" > +.BR MADV_REMOVE " (since Linux 3.5)" > 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 > +only shmfs/tmpfs, ext4, ocfs2 and xfs supports this; other filesystems return with the > error > .BR ENOSYS . > .\" Databases want to use this feature to drop a section of their > -- Jan Chaloupka ------------------------------ * Software Engineer * * ENG Base Operating Systems * * Red Hat Czech, s. r. o. * * UTC+1 (CET), jchaloup * -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html