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ext4: use bio layer instead of buffer layer in mpage_da_submit_io

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Call the block I/O layer directly instad of going through the buffer
layer.  This should give us much better performance and scalability,
as well as lowering our CPU utilization when doing buffered writeback.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2010-10-27 21:30:10 -04:00
parent 1de3e3df91
commit bd2d0210cf
6 changed files with 489 additions and 109 deletions
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8
fs/ext4/super.c
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@@ -4769,9 +4769,12 @@ static int __init init_ext4_fs(void)
int err;
ext4_check_flag_values();
err = init_ext4_system_zone();
err = init_ext4_pageio();
if (err)
return err;
err = init_ext4_system_zone();
if (err)
goto out5;
ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj);
if (!ext4_kset)
goto out4;
@@ -4812,6 +4815,8 @@ out3:
kset_unregister(ext4_kset);
out4:
exit_ext4_system_zone();
out5:
exit_ext4_pageio();
return err;
}
@@ -4827,6 +4832,7 @@ static void __exit exit_ext4_fs(void)
remove_proc_entry("fs/ext4", NULL);
kset_unregister(ext4_kset);
exit_ext4_system_zone();
exit_ext4_pageio();
}
MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");