ext4: grow the s_flex_groups array as needed when resizing

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Previously, we allocated the s_flex_groups array to the maximum size
that the file system could be resized.  There was two problems with
this approach.  First, it wasted memory in the common case where the
file system was not resized.  Secondly, once we start allowing online
resizing using the meta_bg scheme, there is no maximum size that the
file system can be resized.  So instead, we need to grow the
s_flex_groups at inline resize time.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

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This commit is contained in:

Theodore Ts'o 2012-09-05 01:29:50 -04:00

parent 2ebd1704de

commit 117fff10d7

3 changed files with 47 additions and 18 deletions

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3

fs/ext4/ext4.h

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14

fs/ext4/resize.c

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48

fs/ext4/super.c

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