@@ -8,6 +8,7 @@
#include <linux/hash.h>
#include <linux/file.h>
#include <linux/sched.h>
+#include <linux/module.h>
#include "vfs.h"
#include "nfsd.h"
@@ -16,8 +17,10 @@
#define NFSDDBG_FACILITY NFSDDBG_FH
-/* Min time we should keep around a file cache entry */
-#define NFSD_FILE_EXPIRE (HZ)
+/* Min time we should keep around a file cache entry (in jiffies) */
+static unsigned int nfsd_file_cache_expiry = HZ;
+module_param(nfsd_file_cache_expiry, uint, 0644);
+MODULE_PARM_DESC(nfsd_file_cache_expiry, "Expire time for open file cache (in jiffies)");
/* We only care about NFSD_MAY_READ/WRITE for this cache */
#define NFSD_FILE_MAY_MASK (NFSD_MAY_READ|NFSD_MAY_WRITE)
@@ -40,7 +43,7 @@ nfsd_file_count_inc(void)
{
if (atomic_inc_return(&nfsd_file_count) == 1)
queue_delayed_work(nfsd_laundry_wq, &nfsd_file_cache_clean_work,
- NFSD_FILE_EXPIRE);
+ nfsd_file_cache_expiry);
}
static void
@@ -169,7 +172,8 @@ nfsd_file_cache_prune(void)
continue;
/* Was this file touched recently? */
- if (time_before(nf->nf_time + NFSD_FILE_EXPIRE, jiffies))
+ if (time_before(nf->nf_time + nfsd_file_cache_expiry,
+ jiffies))
continue;
/* Ok, it's expired...unhash it */
@@ -193,7 +197,7 @@ nfsd_file_cache_cleaner(struct work_struct *work)
if (atomic_read(&nfsd_file_count))
queue_delayed_work(nfsd_laundry_wq, &nfsd_file_cache_clean_work,
- NFSD_FILE_EXPIRE);
+ nfsd_file_cache_expiry);
}
int
This is primarily for testing purposes, but this may also be useful until we have a better idea for a sensible default here. Signed-off-by: Jeff Layton <jeff.layton@primarydata.com> --- fs/nfsd/filecache.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)