diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2018-05-23 18:07:21 +0200 |
|---|---|---|
| committer | Jeff Cody <jcody@redhat.com> | 2018-06-05 10:15:12 -0400 |
| commit | 68acc99f143b60ec4faa2903065b187d4d3c4bf3 (patch) | |
| tree | 3ca2960edfd6412cd61ee0b7ff4be7de34a115d4 /block/sheepdog.c | |
| parent | 03b036cc0ca3362ff1aacd70315f5e53f4234f5c (diff) | |
sheepdog: remove huge BSS object
block/sheepdog.o has a 4M static variable that is 90% of QEMU's whole .bss
section. Replace it with a heap-allocated block, and make it smaller too
since only the inode header is actually being used.
bss size goes down from 4464280 to 269976.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20180523160721.14018-3-pbonzini@redhat.com>
Signed-off-by: Jeff Cody <jcody@redhat.com>
Diffstat (limited to 'block/sheepdog.c')
| -rw-r--r-- | block/sheepdog.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/block/sheepdog.c b/block/sheepdog.c index cfc0e28aa5..7b98725af7 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -2938,13 +2938,14 @@ static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab) QEMUSnapshotInfo *sn_tab = NULL; unsigned wlen, rlen; int found = 0; - static SheepdogInode inode; + SheepdogInode *inode; unsigned long *vdi_inuse; unsigned int start_nr; uint64_t hval; uint32_t vid; vdi_inuse = g_malloc(max); + inode = g_malloc(SD_INODE_HEADER_SIZE); fd = connect_to_sdog(s, &local_err); if (fd < 0) { @@ -2987,7 +2988,7 @@ static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab) } /* we don't need to read entire object */ - ret = read_object(fd, s->bs, (char *)&inode, + ret = read_object(fd, s->bs, (char *)inode, vid_to_vdi_oid(vid), 0, SD_INODE_HEADER_SIZE, 0, s->cache_flags); @@ -2996,17 +2997,17 @@ static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab) continue; } - if (!strcmp(inode.name, s->name) && is_snapshot(&inode)) { - sn_tab[found].date_sec = inode.snap_ctime >> 32; - sn_tab[found].date_nsec = inode.snap_ctime & 0xffffffff; - sn_tab[found].vm_state_size = inode.vm_state_size; - sn_tab[found].vm_clock_nsec = inode.vm_clock_nsec; + if (!strcmp(inode->name, s->name) && is_snapshot(inode)) { + sn_tab[found].date_sec = inode->snap_ctime >> 32; + sn_tab[found].date_nsec = inode->snap_ctime & 0xffffffff; + sn_tab[found].vm_state_size = inode->vm_state_size; + sn_tab[found].vm_clock_nsec = inode->vm_clock_nsec; snprintf(sn_tab[found].id_str, sizeof(sn_tab[found].id_str), - "%" PRIu32, inode.snap_id); + "%" PRIu32, inode->snap_id); pstrcpy(sn_tab[found].name, - MIN(sizeof(sn_tab[found].name), sizeof(inode.tag)), - inode.tag); + MIN(sizeof(sn_tab[found].name), sizeof(inode->tag)), + inode->tag); found++; } } @@ -3016,6 +3017,7 @@ out: *psn_tab = sn_tab; g_free(vdi_inuse); + g_free(inode); if (ret < 0) { return ret; |