Re: [PATCH] madvise.2: madvise(, , MADV_REMOVE) supports ext4, ocfs2 and xfs as well

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



ping

On 10/07/2014 04:03 PM, Jan Chaloupka wrote:
As from upstream commit:

commit 3f31d07571eeea18a7d34db9af21d2285b807a17
Author: Hugh Dickins <hughd@xxxxxxxxxx>
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for MADV_REMOVE just got out-of-date in that regard.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 <jchaloup@xxxxxxxxxx>
---
  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@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Kernel Documentation]     [Netdev]     [Linux Ethernet Bridging]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux Admin]     [Samba]

  Powered by Linux