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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-03-11 18:11:25 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-03-16 15:05:25 +0300
commitf5cf319cf32d2284b3fbc24f3c526e2a9363b4ac (patch)
tree0d9a970edf83931e3fe7dbda8e2501aed87eb6c2 /fs/ubifs
parentcab95d446cb766062fa7e2e7e326035d7c65b803 (diff)
downloadlinux-f5cf319cf32d2284b3fbc24f3c526e2a9363b4ac.tar.xz
UBIFS: allocate orphans scan buffer on demand
Instead of using pre-allocated 'c->dbg->buf' buffer in 'dbg_scan_orphans()', dynamically allocate it when needed. The intend is to get rid of the pre-allocated 'c->dbg->buf' buffer and save 128KiB of RAM (or more if PEB size is larger). Indeed, currently we allocate this memory even if the user never enables any self-check, which is wasteful. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/ubifs')
-rw-r--r--fs/ubifs/orphan.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c
index 82009c74b6a3..2cdbd31641d7 100644
--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -892,15 +892,22 @@ static int dbg_read_orphans(struct check_info *ci, struct ubifs_scan_leb *sleb)
static int dbg_scan_orphans(struct ubifs_info *c, struct check_info *ci)
{
int lnum, err = 0;
+ void *buf;
/* Check no-orphans flag and skip this if no orphans */
if (c->no_orphs)
return 0;
+ buf = __vmalloc(c->leb_size, GFP_KERNEL | GFP_NOFS, PAGE_KERNEL);
+ if (!buf) {
+ ubifs_err("cannot allocate memory to check orphans");
+ return 0;
+ }
+
for (lnum = c->orph_first; lnum <= c->orph_last; lnum++) {
struct ubifs_scan_leb *sleb;
- sleb = ubifs_scan(c, lnum, 0, c->dbg->buf, 0);
+ sleb = ubifs_scan(c, lnum, 0, buf, 0);
if (IS_ERR(sleb)) {
err = PTR_ERR(sleb);
break;
@@ -912,6 +919,7 @@ static int dbg_scan_orphans(struct ubifs_info *c, struct check_info *ci)
break;
}
+ vfree(buf);
return err;
}