From: Namjae Jeon <namjae.jeon@samsung.com>
To: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,
Andrew Morton <akpm@linux-foundation.org>
Cc: linux-fsdevel@vger.kernel.org
Subject: [PATCH v6 4/4] Documentation/filesystems/vfat.txt: update the limitation for fat fallocate
Date: Fri, 17 Oct 2014 20:27:11 +0900 [thread overview]
Message-ID: <006f01cfe9fd$4b1db6f0$e15924d0$@samsung.com> (raw)
Update the limitation for fat fallocate.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
---
Documentation/filesystems/vfat.txt | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/Documentation/filesystems/vfat.txt b/Documentation/filesystems/vfat.txt
index ce1126a..223c321 100644
--- a/Documentation/filesystems/vfat.txt
+++ b/Documentation/filesystems/vfat.txt
@@ -180,6 +180,16 @@ dos1xfloppy -- If set, use a fallback default BIOS Parameter Block
<bool>: 0,1,yes,no,true,false
+LIMITATION
+---------------------------------------------------------------------
+* The fallocated region of file is discarded at umount/evict time
+ when using fallocate with FALLOC_FL_KEEP_SIZE.
+ So, User should assume that fallocated region can be discarded at
+ last close if there is memory pressure resulting in eviction of
+ the inode from the memory. As a result, for any dependency on
+ the fallocated region, user should make sure to recheck fallocate
+ after reopening the file.
+
TODO
----------------------------------------------------------------------
* Need to get rid of the raw scanning stuff. Instead, always use
--
1.7.11-rc0
reply other threads:[~2014-10-17 11:27 UTC|newest]
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