xfs: fix type mismatches in the inode reclaim functions

It's currently unlikely that we will ever end up with more than 4
billion inodes waiting for reclamation, but the fs object code uses long
int for object counts and we're certainly capable of generating that
many.  Instead of truncating the internal counters, widen them and
report the object counts correctly.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 6b44fc7..6007683 100644 (file)
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1084,11 +1084,11 @@ xfs_reclaim_inodes(
 long
 xfs_reclaim_inodes_nr(
        struct xfs_mount        *mp,
-       int                     nr_to_scan)
+       unsigned long           nr_to_scan)
 {
        struct xfs_icwalk       icw = {
                .icw_flags      = XFS_ICWALK_FLAG_SCAN_LIMIT,
-               .icw_scan_limit = nr_to_scan,
+               .icw_scan_limit = min_t(unsigned long, LONG_MAX, nr_to_scan),
        };
 
        if (xfs_want_reclaim_sick(mp))
@@ -1106,13 +1106,13 @@ xfs_reclaim_inodes_nr(
  * Return the number of reclaimable inodes in the filesystem for
  * the shrinker to determine how much to reclaim.
  */
-int
+long
 xfs_reclaim_inodes_count(
        struct xfs_mount        *mp)
 {
        struct xfs_perag        *pag;
        xfs_agnumber_t          ag = 0;
-       int                     reclaimable = 0;
+       long                    reclaimable = 0;
 
        while ((pag = xfs_perag_get_tag(mp, ag, XFS_ICI_RECLAIM_TAG))) {
                ag = pag->pag_agno + 1;

diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h
index 00dc98a..c751cc3 100644 (file)
--- a/fs/xfs/xfs_icache.h
+++ b/fs/xfs/xfs_icache.h
@@ -15,7 +15,7 @@ struct xfs_icwalk {
        kgid_t          icw_gid;
        prid_t          icw_prid;
        __u64           icw_min_file_size;
-       int             icw_scan_limit;
+       long            icw_scan_limit;
 };
 
 /* Flags that reflect xfs_fs_eofblocks functionality. */
@@ -49,8 +49,8 @@ void xfs_inode_free(struct xfs_inode *ip);
 void xfs_reclaim_worker(struct work_struct *work);
 
 void xfs_reclaim_inodes(struct xfs_mount *mp);
-int xfs_reclaim_inodes_count(struct xfs_mount *mp);
-long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
+long xfs_reclaim_inodes_count(struct xfs_mount *mp);
+long xfs_reclaim_inodes_nr(struct xfs_mount *mp, unsigned long nr_to_scan);
 
 void xfs_inode_mark_reclaimable(struct xfs_inode *ip);
 

diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index a442bc4..f9d8d60 100644 (file)
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -3895,7 +3895,7 @@ DECLARE_EVENT_CLASS(xfs_icwalk_class,
                __field(uint32_t, gid)
                __field(prid_t, prid)
                __field(__u64, min_file_size)
-               __field(int, scan_limit)
+               __field(long, scan_limit)
                __field(unsigned long, caller_ip)
        ),
        TP_fast_assign(
@@ -3910,7 +3910,7 @@ DECLARE_EVENT_CLASS(xfs_icwalk_class,
                __entry->scan_limit = icw ? icw->icw_scan_limit : 0;
                __entry->caller_ip = caller_ip;
        ),
-       TP_printk("dev %d:%d flags 0x%x uid %u gid %u prid %u minsize %llu scan_limit %d caller %pS",
+       TP_printk("dev %d:%d flags 0x%x uid %u gid %u prid %u minsize %llu scan_limit %ld caller %pS",
                  MAJOR(__entry->dev), MINOR(__entry->dev),
                  __entry->flags,
                  __entry->uid,