On Fri, Mar 10 2017, Lars Ellenberg wrote:
>> --- a/block/blk-core.c
>> +++ b/block/blk-core.c
>> @@ -1975,7 +1975,14 @@ generic_make_request_checks(struct bio *bio)
>> */
>> blk_qc_t generic_make_request(struct bio *bio)
>> {
>> - struct bio_list bio_list_on_stack;
>> + /*
>> +
On Fri, Mar 10, 2017 at 04:07:58PM +0100, Jack Wang wrote:
> On 10.03.2017 15:55, Mikulas Patocka wrote:
> > On Fri, 10 Mar 2017, Mike Snitzer wrote:
> >> On Fri, Mar 10 2017 at 7:34am -0500,
> >> Lars Ellenberg wrote:
> >>
> --- a/block/blk-core.c
> +++ b/block/blk-core.c
> @@ -19
On Fri, Mar 10 2017 at 10:07am -0500,
Jack Wang wrote:
>
>
> On 10.03.2017 15:55, Mikulas Patocka wrote:
> >
> >
> > On Fri, 10 Mar 2017, Mike Snitzer wrote:
> >
> >> On Fri, Mar 10 2017 at 7:34am -0500,
> >> Lars Ellenberg wrote:
> >>
> --- a/block/blk-core.c
> +++ b/block/blk-c
On 10.03.2017 15:55, Mikulas Patocka wrote:
>
>
> On Fri, 10 Mar 2017, Mike Snitzer wrote:
>
>> On Fri, Mar 10 2017 at 7:34am -0500,
>> Lars Ellenberg wrote:
>>
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1975,7 +1975,14 @@ generic_make_request_checks(struct bio *bio)
>>
On Fri, 10 Mar 2017, Mike Snitzer wrote:
> On Fri, Mar 10 2017 at 7:34am -0500,
> Lars Ellenberg wrote:
>
> > > --- a/block/blk-core.c
> > > +++ b/block/blk-core.c
> > > @@ -1975,7 +1975,14 @@ generic_make_request_checks(struct bio *bio)
> > > */
> > > blk_qc_t generic_make_request(struct
On Fri, Mar 10 2017 at 7:34am -0500,
Lars Ellenberg wrote:
> > --- a/block/blk-core.c
> > +++ b/block/blk-core.c
> > @@ -1975,7 +1975,14 @@ generic_make_request_checks(struct bio *bio)
> > */
> > blk_qc_t generic_make_request(struct bio *bio)
> > {
> > - struct bio_list bio_list_on_sta
> --- a/block/blk-core.c
> +++ b/block/blk-core.c
> @@ -1975,7 +1975,14 @@ generic_make_request_checks(struct bio *bio)
> */
> blk_qc_t generic_make_request(struct bio *bio)
> {
> - struct bio_list bio_list_on_stack;
> + /*
> +* bio_list_on_stack[0] contains bios submitted b
On Thu, Mar 09 2017, Jens Axboe wrote:
> On 03/09/2017 09:32 PM, NeilBrown wrote:
>>
>> I started looking further at the improvements we can make once
>> generic_make_request is fixed, and realised that I had missed an
>> important detail in this patch.
>> Several places test current->bio_list, a
On 03/09/2017 09:38 PM, Jens Axboe wrote:
> On 03/09/2017 09:32 PM, NeilBrown wrote:
>>
>> I started looking further at the improvements we can make once
>> generic_make_request is fixed, and realised that I had missed an
>> important detail in this patch.
>> Several places test current->bio_list,
On 03/09/2017 09:32 PM, NeilBrown wrote:
>
> I started looking further at the improvements we can make once
> generic_make_request is fixed, and realised that I had missed an
> important detail in this patch.
> Several places test current->bio_list, and two actually edit the list.
> With this chan
I started looking further at the improvements we can make once
generic_make_request is fixed, and realised that I had missed an
important detail in this patch.
Several places test current->bio_list, and two actually edit the list.
With this change, that cannot see the whole lists, so it could caus
To avoid recursion on the kernel stack when stacked block devices
are in use, generic_make_request() will, when called recursively,
queue new requests for later handling. They will be handled when the
make_request_fn for the current bio completes.
If any bios are submitted by a make_request_fn,
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