Discussion:
[PATCH v6 4/4] Documentation/filesystems/vfat.txt: update the limitation for fat fallocate
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Namjae Jeon
2014-10-17 11:27:11 UTC
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Update the limitation for fat fallocate.

Signed-off-by: Namjae Jeon <***@samsung.com>
Signed-off-by: Amit 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

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