Commit 1a855033 authored by Bob Peterson's avatar Bob Peterson Committed by Steven Whitehouse
Browse files

GFS2: If we use up our block reservation, request more next time 



If we run out of blocks for a given multi-block allocation, we obviously
did not reserve enough. We should reserve more blocks for the next
reservation to reduce fragmentation. This patch increases the size hint
for reservations when they run out.

Signed-off-by: default avatarBob Peterson <rpeterso@redhat.com>
Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
parent 33ad5d54

fs/gfs2/rgrp.c

+3 −0
Original line number Diff line number Diff line
@@ -2251,6 +2251,9 @@ static void gfs2_adjust_reservation(struct gfs2_inode *ip, 
			trace_gfs2_rs(rs, TRACE_RS_CLAIM);

			if (rs->rs_free && !ret)

				goto out;

			/* We used up our block reservation, so we should

			   reserve more blocks next time. */

			atomic_add(RGRP_RSRV_ADDBLKS, &rs->rs_sizehint);

		}

		__rs_deltree(rs);

	}

fs/gfs2/rgrp.h

+1 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
 */

#define RGRP_RSRV_MINBYTES 8

#define RGRP_RSRV_MINBLKS ((u32)(RGRP_RSRV_MINBYTES * GFS2_NBBY))

#define RGRP_RSRV_ADDBLKS 64



struct gfs2_rgrpd;

struct gfs2_sbd;