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authorTheodore Ts'o <tytso@mit.edu>2015-03-17 12:23:32 -0400
committerTheodore Ts'o <tytso@mit.edu>2015-03-17 12:23:32 -0400
commit1efff914afac8a965ad63817ecf8861a927c2ace (patch)
treed7b582a4811e957a7dc6abd26629694276e19e2d /fs/fs-writeback.c
parenta2f4870697a5bcf4a87073ec6b32dd2928c1211d (diff)
downloadlinux-1efff914afac8a965ad63817ecf8861a927c2ace.tar.bz2
fs: add dirtytime_expire_seconds sysctl
Add a tuning knob so we can adjust the dirtytime expiration timeout, which is very useful for testing lazytime. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/fs-writeback.c')
-rw-r--r--fs/fs-writeback.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 2cfcd74faf87..32a8bbd7a9ad 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1188,6 +1188,17 @@ static int __init start_dirtytime_writeback(void)
}
__initcall(start_dirtytime_writeback);
+int dirtytime_interval_handler(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int ret;
+
+ ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
+ if (ret == 0 && write)
+ mod_delayed_work(system_wq, &dirtytime_work, 0);
+ return ret;
+}
+
static noinline void block_dump___mark_inode_dirty(struct inode *inode)
{
if (inode->i_ino || strcmp(inode->i_sb->s_id, "bdev")) {