Hi,
I just found out about pahole today. I'm looking to audit lvm2's data
structures and pahole is perfect for helping me do so.
Unfortunately, when I run pahole against lvm2 I'm getting many BRAIN
FART ALERTs on F12 x86_64 (dwarves-1.7-5.x86_64). I had a look at your
OLS 2007 "7 dwarves" paper and figured I'd try your minimalist
swiss_cheese example, this is what I get:
$ pahole swiss_cheese
struct cheese {
char name[17]; /* 0 17 */
short int age; /* 0 2 */
char type; /* 0 1 */
int calories; /* 0 4 */
short int price; /* 0 2 */
int barcode[4]; /* 0 16 */
/* size: 48, cachelines: 1, members: 6 */
/* padding: 32 */
/* last cacheline: 48 bytes */
/* BRAIN FART ALERT! 48 != 17 + 0(holes), diff = 31 */
};
When I compare the above to the output listed in your paper it is clear
pahole is pretty unhappy on F12. If I do the same on F11 (x86_64) all
works fine.
Should I open a fedora (F12) bug?
Mike
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