Messages in this thread | | | Date | Wed, 19 Jun 2019 18:09:40 +0100 | From | Al Viro <> | Subject | Re: d_lookup: Unable to handle kernel paging request |
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On Wed, Jun 19, 2019 at 06:51:51PM +0200, Vicente Bergas wrote:
> > What's your config, BTW? SMP and DEBUG_SPINLOCK, specifically... > > Hi Al, > here it is: > https://paste.debian.net/1088517
Aha... So LIST_BL_LOCKMASK is 1 there (same as on distro builds)...
Hell knows - how about static inline void hlist_bl_lock(struct hlist_bl_head *b) { BUG_ON(((u32)READ_ONCE(*b)&~LIST_BL_LOCKMASK) == 0x01000000); bit_spin_lock(0, (unsigned long *)b); }
and
static inline void hlist_bl_unlock(struct hlist_bl_head *b) { __bit_spin_unlock(0, (unsigned long *)b); BUG_ON(((u32)READ_ONCE(*b)&~LIST_BL_LOCKMASK) == 0x01000000); }
to see if we can narrow down where that happens?
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