On Mon 16-03-15 15:14:20, Ted Tso wrote: > 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 <[email protected]> > Cc: [email protected] CC to stable isn't needed. Otherwise:
Reviewed-by: Jan Kara <[email protected]> Honza > --- > fs/fs-writeback.c | 11 +++++++++++ > include/linux/writeback.h | 3 +++ > kernel/sysctl.c | 8 ++++++++ > 3 files changed, 22 insertions(+) > > diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c > index ae13fba..d6fa722 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")) { > diff --git a/include/linux/writeback.h b/include/linux/writeback.h > index 0004833..b2dd371e 100644 > --- a/include/linux/writeback.h > +++ b/include/linux/writeback.h > @@ -130,6 +130,7 @@ extern int vm_dirty_ratio; > extern unsigned long vm_dirty_bytes; > extern unsigned int dirty_writeback_interval; > extern unsigned int dirty_expire_interval; > +extern unsigned int dirtytime_expire_interval; > extern int vm_highmem_is_dirtyable; > extern int block_dump; > extern int laptop_mode; > @@ -146,6 +147,8 @@ extern int dirty_ratio_handler(struct ctl_table *table, > int write, > extern int dirty_bytes_handler(struct ctl_table *table, int write, > void __user *buffer, size_t *lenp, > loff_t *ppos); > +int dirtytime_interval_handler(struct ctl_table *table, int write, > + void __user *buffer, size_t *lenp, loff_t *ppos); > > struct ctl_table; > int dirty_writeback_centisecs_handler(struct ctl_table *, int, > diff --git a/kernel/sysctl.c b/kernel/sysctl.c > index 88ea2d6..ce410bb 100644 > --- a/kernel/sysctl.c > +++ b/kernel/sysctl.c > @@ -1228,6 +1228,14 @@ static struct ctl_table vm_table[] = { > .extra1 = &zero, > }, > { > + .procname = "dirtytime_expire_seconds", > + .data = &dirtytime_expire_interval, > + .maxlen = sizeof(dirty_expire_interval), > + .mode = 0644, > + .proc_handler = dirtytime_interval_handler, > + .extra1 = &zero, > + }, > + { > .procname = "nr_pdflush_threads", > .mode = 0444 /* read-only */, > .proc_handler = pdflush_proc_obsolete, > -- > 2.3.0 > -- Jan Kara <[email protected]> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
