From cd5e3893479328f76252cb33f2b243c49214f38b Mon Sep 17 00:00:00 2001 From: Brian Behlendorf Date: Fri, 31 Jan 2014 16:35:53 -0800 Subject: [PATCH] Fix corrupted l2_asize in arcstats Commit e0b0ca9 accidentally corrupted the l2_asize displayed in arcstats. This was caused by changing the l2arc_buf_hdr.b_asize member from an int to uint32_t type. There are places in the code where this field is cast to a uint64_t resulting in the b_hits member being treated as part of b_asize. To resolve the issue the type has been changed to a uint64_t, and the b_hits member is placed after the enum to prevent the size of the structure from increasing. This is a good example of exactly why it's a bad idea to use ambiguous types (int) in these structures. Signed-off-by: Brian Behlendorf Issue #1990 --- module/zfs/arc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/module/zfs/arc.c b/module/zfs/arc.c index 2459c9326f0d..cbe0a6028cd3 100644 --- a/module/zfs/arc.c +++ b/module/zfs/arc.c @@ -743,8 +743,8 @@ struct l2arc_buf_hdr { /* compression applied to buffer data */ enum zio_compress b_compress; /* real alloc'd buffer size depending on b_compress applied */ - uint32_t b_asize; uint32_t b_hits; + uint64_t b_asize; /* temporary buffer holder for in-flight compressed data */ void *b_tmp_cdata; };