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44 lines
1.3 KiB
44 lines
1.3 KiB
From 165af99c57a686444167fcef56f9fae31d815887 Mon Sep 17 00:00:00 2001 |
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From: Lukas Czerner <lczerner@redhat.com> |
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Date: Mon, 24 Feb 2014 18:41:06 +0100 |
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Subject: [PATCH 4/8] mke2fs: Enable lazy_itable_init on newer kernel by |
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default |
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Currently is used did not specified lazy_itable_init option we rely on |
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information from ext4 module exported via sysfs interface. However if |
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the ext4 module is not loaded it will not be enabled even though kernel |
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might support it. |
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With this commit we set the default according to the kernel version, |
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however we still allow it to be set manually via extended option or be |
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enabled in case that ext4 module advertise that it supports this |
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feature. |
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Signed-off-by: Lukas Czerner <lczerner@redhat.com> |
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--- |
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misc/mke2fs.c | 10 +++++++++- |
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1 file changed, 9 insertions(+), 1 deletion(-) |
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diff --git a/misc/mke2fs.c b/misc/mke2fs.c |
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index 76ea60b..23a988e 100644 |
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--- a/misc/mke2fs.c |
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+++ b/misc/mke2fs.c |
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@@ -1998,7 +1998,15 @@ profile_error: |
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blocksize, sys_page_size); |
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} |
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- lazy_itable_init = 0; |
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+ /* |
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+ * On newer kernels we do have lazy_itable_init support. So pick the |
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+ * right default in case ext4 module is not loaded. |
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+ */ |
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+ if (is_before_linux_ver(2, 6, 37)) |
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+ lazy_itable_init = 0; |
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+ else |
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+ lazy_itable_init = 1; |
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+ |
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if (access("/sys/fs/ext4/features/lazy_itable_init", R_OK) == 0) |
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lazy_itable_init = 1; |
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-- |
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1.8.3.1
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