* [PATCH 1/2] lightnvm: warn if irqs are disabled in lock laddr
@ 2016-02-01 10:34 Javier González
2016-02-01 10:34 ` [PATCH 2/2] lightnvm: fix request intersection locking in rrpc Javier González
2016-02-03 8:54 ` [PATCH 1/2] lightnvm: warn if irqs are disabled in lock laddr Matias Bjørling
0 siblings, 2 replies; 4+ messages in thread
From: Javier González @ 2016-02-01 10:34 UTC (permalink / raw)
To: mb; +Cc: linux-kernel, linux-block, Javier González
Add a warning if irqs are disabled when locking a new address in rrpc.
The typical path to a new request does not disable irqs, but this is not
guaranteed in the future.
Signed-off-by: Javier González <javier@cnexlabs.com>
---
drivers/lightnvm/rrpc.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
index dfca5c4..c27283a 100644
--- a/drivers/lightnvm/rrpc.h
+++ b/drivers/lightnvm/rrpc.h
@@ -184,6 +184,8 @@ static int __rrpc_lock_laddr(struct rrpc *rrpc, sector_t laddr,
sector_t laddr_end = laddr + pages - 1;
struct rrpc_inflight_rq *rtmp;
+ WARN_ON(irqs_disabled());
+
spin_lock_irq(&rrpc->inflights.lock);
list_for_each_entry(rtmp, &rrpc->inflights.reqs, list) {
if (unlikely(request_intersects(rtmp, laddr, laddr_end))) {
--
2.1.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 2/2] lightnvm: fix request intersection locking in rrpc
2016-02-01 10:34 [PATCH 1/2] lightnvm: warn if irqs are disabled in lock laddr Javier González
@ 2016-02-01 10:34 ` Javier González
2016-02-03 8:53 ` Matias Bjørling
2016-02-03 8:54 ` [PATCH 1/2] lightnvm: warn if irqs are disabled in lock laddr Matias Bjørling
1 sibling, 1 reply; 4+ messages in thread
From: Javier González @ 2016-02-01 10:34 UTC (permalink / raw)
To: mb; +Cc: linux-kernel, linux-block, Javier González
This patch fixes an error on the calculation of intersecting logical
addresses; it contemplates the case where a new request including
several addresses intersects with a single locked address. This case is
typical when multiple pages are sent in a new request, while GC - which
at the moment sends one address at the time - is running.
Signed-off-by: Javier González <javier@cnexlabs.com>
---
drivers/lightnvm/rrpc.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
index c27283a..3989d65 100644
--- a/drivers/lightnvm/rrpc.h
+++ b/drivers/lightnvm/rrpc.h
@@ -174,8 +174,7 @@ static inline sector_t rrpc_get_sector(sector_t laddr)
static inline int request_intersects(struct rrpc_inflight_rq *r,
sector_t laddr_start, sector_t laddr_end)
{
- return (laddr_end >= r->l_start && laddr_end <= r->l_end) &&
- (laddr_start >= r->l_start && laddr_start <= r->l_end);
+ return (laddr_end >= r->l_start) && (laddr_start <= r->l_end);
}
static int __rrpc_lock_laddr(struct rrpc *rrpc, sector_t laddr,
--
2.1.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 2/2] lightnvm: fix request intersection locking in rrpc
2016-02-01 10:34 ` [PATCH 2/2] lightnvm: fix request intersection locking in rrpc Javier González
@ 2016-02-03 8:53 ` Matias Bjørling
0 siblings, 0 replies; 4+ messages in thread
From: Matias Bjørling @ 2016-02-03 8:53 UTC (permalink / raw)
To: Javier González; +Cc: linux-kernel, linux-block, Javier González
On 02/01/2016 11:34 AM, Javier González wrote:
> This patch fixes an error on the calculation of intersecting logical
> addresses; it contemplates the case where a new request including
> several addresses intersects with a single locked address. This case is
> typical when multiple pages are sent in a new request, while GC - which
> at the moment sends one address at the time - is running.
>
> Signed-off-by: Javier González <javier@cnexlabs.com>
> ---
> drivers/lightnvm/rrpc.h | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
> index c27283a..3989d65 100644
> --- a/drivers/lightnvm/rrpc.h
> +++ b/drivers/lightnvm/rrpc.h
> @@ -174,8 +174,7 @@ static inline sector_t rrpc_get_sector(sector_t laddr)
> static inline int request_intersects(struct rrpc_inflight_rq *r,
> sector_t laddr_start, sector_t laddr_end)
> {
> - return (laddr_end >= r->l_start && laddr_end <= r->l_end) &&
> - (laddr_start >= r->l_start && laddr_start <= r->l_end);
> + return (laddr_end >= r->l_start) && (laddr_start <= r->l_end);
> }
>
> static int __rrpc_lock_laddr(struct rrpc *rrpc, sector_t laddr,
>
Thanks, applied for next -rc.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 1/2] lightnvm: warn if irqs are disabled in lock laddr
2016-02-01 10:34 [PATCH 1/2] lightnvm: warn if irqs are disabled in lock laddr Javier González
2016-02-01 10:34 ` [PATCH 2/2] lightnvm: fix request intersection locking in rrpc Javier González
@ 2016-02-03 8:54 ` Matias Bjørling
1 sibling, 0 replies; 4+ messages in thread
From: Matias Bjørling @ 2016-02-03 8:54 UTC (permalink / raw)
To: Javier González; +Cc: linux-kernel, linux-block, Javier González
On 02/01/2016 11:34 AM, Javier González wrote:
> Add a warning if irqs are disabled when locking a new address in rrpc.
> The typical path to a new request does not disable irqs, but this is not
> guaranteed in the future.
>
> Signed-off-by: Javier González <javier@cnexlabs.com>
> ---
> drivers/lightnvm/rrpc.h | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
> index dfca5c4..c27283a 100644
> --- a/drivers/lightnvm/rrpc.h
> +++ b/drivers/lightnvm/rrpc.h
> @@ -184,6 +184,8 @@ static int __rrpc_lock_laddr(struct rrpc *rrpc, sector_t laddr,
> sector_t laddr_end = laddr + pages - 1;
> struct rrpc_inflight_rq *rtmp;
>
> + WARN_ON(irqs_disabled());
> +
> spin_lock_irq(&rrpc->inflights.lock);
> list_for_each_entry(rtmp, &rrpc->inflights.reqs, list) {
> if (unlikely(request_intersects(rtmp, laddr, laddr_end))) {
>
Thanks, applied for next -rc.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2016-02-03 8:54 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-02-01 10:34 [PATCH 1/2] lightnvm: warn if irqs are disabled in lock laddr Javier González
2016-02-01 10:34 ` [PATCH 2/2] lightnvm: fix request intersection locking in rrpc Javier González
2016-02-03 8:53 ` Matias Bjørling
2016-02-03 8:54 ` [PATCH 1/2] lightnvm: warn if irqs are disabled in lock laddr Matias Bjørling
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).