search for: nr_active

This patch should fix the bug reported in https://lkml.org/lkml/2014/9/11/249. Test is still pending. David Hildenbrand (1): blk-mq: Avoid race condition with uninitialized requests block/blk-mq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 1.8.5.5

This patch should fix the bug reported in https://lkml.org/lkml/2014/9/11/249. Test is still pending. David Hildenbrand (1): blk-mq: Avoid race condition with uninitialized requests block/blk-mq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 1.8.5.5

--- .gitignore | 1 + tests/qemu/Makefile.am | 22 +- tests/qemu/boot-analysis.c | 1098 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 1118 insertions(+), 3 deletions(-) create mode 100644 tests/qemu/boot-analysis.c diff --git a/.gitignore b/.gitignore index 1493011..9306a19 100644 --- a/.gitignore +++ b/.gitignore @@ -510,6 +510,7 @@ Makefile.in

v4: - Lots more analysis of the /init script and other parts. - Display a list of the longest to shortest activities. - Rebase on top of current head. Rich.

...3,7 +203,6 @@ __blk_mq_alloc_request(struct blk_mq_alloc_data *data, int rw) if (tag != BLK_MQ_TAG_FAIL) { rq = data->hctx->tags->rqs[tag]; - rq->cmd_flags = 0; if (blk_mq_tag_busy(data->hctx)) { rq->cmd_flags = REQ_MQ_INFLIGHT; atomic_inc(&data->hctx->nr_active); @@ -258,6 +257,7 @@ static void __blk_mq_free_request(struct blk_mq_hw_ctx *hctx, if (rq->cmd_flags & REQ_MQ_INFLIGHT) atomic_dec(&hctx->nr_active); + rq->cmd_flags = 0; clear_bit(REQ_ATOM_STARTED, &rq->atomic_flags); blk_mq_put_tag(hctx, tag, &ctx->las...

...st(struct blk_mq_alloc_data *data, int rw) > if (tag != BLK_MQ_TAG_FAIL) { > rq = data->hctx->tags->rqs[tag]; > > - rq->cmd_flags = 0; > if (blk_mq_tag_busy(data->hctx)) { > rq->cmd_flags = REQ_MQ_INFLIGHT; > atomic_inc(&data->hctx->nr_active); > @@ -258,6 +257,7 @@ static void __blk_mq_free_request(struct blk_mq_hw_ctx *hctx, > > if (rq->cmd_flags & REQ_MQ_INFLIGHT) > atomic_dec(&hctx->nr_active); > + rq->cmd_flags = 0; > > clear_bit(REQ_ATOM_STARTED, &rq->atomic_flags); > blk_...

...st(struct blk_mq_alloc_data *data, int rw) > if (tag != BLK_MQ_TAG_FAIL) { > rq = data->hctx->tags->rqs[tag]; > > - rq->cmd_flags = 0; > if (blk_mq_tag_busy(data->hctx)) { > rq->cmd_flags = REQ_MQ_INFLIGHT; > atomic_inc(&data->hctx->nr_active); > @@ -258,6 +257,7 @@ static void __blk_mq_free_request(struct blk_mq_hw_ctx *hctx, > > if (rq->cmd_flags & REQ_MQ_INFLIGHT) > atomic_dec(&hctx->nr_active); > + rq->cmd_flags = 0; > > clear_bit(REQ_ATOM_STARTED, &rq->atomic_flags); > blk_...

Lots of changes since v2, too much to remember or summarize. Please ignore patch 11/11, it's just for my testing. Rich.

v1 was here: https://www.redhat.com/archives/libguestfs/2016-March/thread.html#00157 Not running the 'hwclock' command reduces boot times considerably. However I'm not sure if it is safe. See the question I posted on qemu-devel: http://thread.gmane.org/gmane.comp.emulators.qemu/402194 At the moment, about 50% of the time is consumed by SeaBIOS. Of this, about ⅓rd is SGABIOS

On 11/21/2017 11:12 AM, Christian Borntraeger wrote: > > > On 11/21/2017 07:09 PM, Jens Axboe wrote: >> On 11/21/2017 10:27 AM, Jens Axboe wrote: >>> On 11/21/2017 03:14 AM, Christian Borntraeger wrote: >>>> Bisect points to >>>> >>>> 1b5a7455d345b223d3a4658a9e5fce985b7998c1 is the first bad commit >>>> commit

On 11/21/2017 11:12 AM, Christian Borntraeger wrote: > > > On 11/21/2017 07:09 PM, Jens Axboe wrote: >> On 11/21/2017 10:27 AM, Jens Axboe wrote: >>> On 11/21/2017 03:14 AM, Christian Borntraeger wrote: >>>> Bisect points to >>>> >>>> 1b5a7455d345b223d3a4658a9e5fce985b7998c1 is the first bad commit >>>> commit

...quot;, + blk_mq_hctx_notify_prepare, blk_mq_hctx_notify_dead); return 0; } diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 95c9a5c862e2..a6f03e9464fb 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -52,7 +52,7 @@ struct blk_mq_hw_ctx { atomic_t nr_active; - struct hlist_node cpuhp_dead; + struct hlist_node cpuhp; struct kobject kobj; unsigned long poll_considered; diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h index ec32c4c5eb30..28b0fc9229c8 100644 --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@...

...blk_mq_hctx_notify_dead); > return 0; > } > diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h > index 95c9a5c862e2..a6f03e9464fb 100644 > --- a/include/linux/blk-mq.h > +++ b/include/linux/blk-mq.h > @@ -52,7 +52,7 @@ struct blk_mq_hw_ctx { > > atomic_t nr_active; > > - struct hlist_node cpuhp_dead; > + struct hlist_node cpuhp; > struct kobject kobj; > > unsigned long poll_considered; > diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h > index ec32c4c5eb30..28b0fc9229c8 100644 > --- a/include/linux/cpuho...

...blk_mq_hctx_notify_dead); > return 0; > } > diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h > index 95c9a5c862e2..a6f03e9464fb 100644 > --- a/include/linux/blk-mq.h > +++ b/include/linux/blk-mq.h > @@ -52,7 +52,7 @@ struct blk_mq_hw_ctx { > > atomic_t nr_active; > > - struct hlist_node cpuhp_dead; > + struct hlist_node cpuhp; > struct kobject kobj; > > unsigned long poll_considered; > diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h > index ec32c4c5eb30..28b0fc9229c8 100644 > --- a/include/linux/cpuho...

...ds() || likely(!PageDiscarded(page))) { + VM_BUG_ON(PageLRU(page)); + SetPageLRU(page); + VM_BUG_ON(!PageActive(page)); + list_move(&page->lru, &zone->active_list); + pgmoved++; + } else + list_del(&page->lru); + if (!pagevec_add(&pvec, page)) { zone->nr_active += pgmoved; pgmoved = 0;

...ds() || likely(!PageDiscarded(page))) { + VM_BUG_ON(PageLRU(page)); + SetPageLRU(page); + VM_BUG_ON(!PageActive(page)); + list_move(&page->lru, &zone->active_list); + pgmoved++; + } else + list_del(&page->lru); + if (!pagevec_add(&pvec, page)) { zone->nr_active += pgmoved; pgmoved = 0;

Greetings, after Carsten pitched CMM2 on the kvm mini summit here is a repost of version 5 of the guest page hinting patches. The code is still the same but has been adapted to the latest git level. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.

Greetings, after Carsten pitched CMM2 on the kvm mini summit here is a repost of version 5 of the guest page hinting patches. The code is still the same but has been adapted to the latest git level. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.

After way to many months here is the fifth version of the guest page hinting patches. Compared to version four a few improvements have been added: - Avoid page_host_discards() calls outside of page-states.h - The discard list is now implemented via the page_free_discarded hook and architecture specific code. - PG_state_change page flag has been replaced with architecture specficic

After way to many months here is the fifth version of the guest page hinting patches. Compared to version four a few improvements have been added: - Avoid page_host_discards() calls outside of page-states.h - The discard list is now implemented via the page_free_discarded hook and architecture specific code. - PG_state_change page flag has been replaced with architecture specficic