Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

On 1/12/18 3:20 AM, Paolo Valente wrote: > > >> Il giorno 12 gen 2018, alle ore 11:15, Holger Hoffstätte >> ha scritto: >> >> On 01/12/18 06:58, Paolo Valente wrote: >>> >>> Il giorno 28 dic 2017, alle ore 15:00, Holger Hoffstätte

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

On 1/12/18 3:20 AM, Paolo Valente wrote: > > >> Il giorno 12 gen 2018, alle ore 11:15, Holger Hoffstätte >> ha scritto: >> >> On 01/12/18 06:58, Paolo Valente wrote: >>> >>> Il giorno 28 dic 2017, alle ore 15:00, Holger Hoffstätte ha scritto: On 12/28/17 12:19, Paolo

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

> Il giorno 12 gen 2018, alle ore 11:15, Holger Hoffstätte > ha scritto: > > On 01/12/18 06:58, Paolo Valente wrote: >> >> >>> Il giorno 28 dic 2017, alle ore 15:00, Holger Hoffstätte >>> ha scritto: >>> >>> >>> On 12/28/17

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

> Il giorno 12 gen 2018, alle ore 11:15, Holger Hoffstätte > ha scritto: > > On 01/12/18 06:58, Paolo Valente wrote: >> >> >>> Il giorno 28 dic 2017, alle ore 15:00, Holger Hoffstätte >>> ha scritto: >>> >>> >>> On 12/28/17 12:19, Paolo Valente wrote: >>> (snip half a tech report ;) >>>

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

On 01/12/18 06:58, Paolo Valente wrote: > > >> Il giorno 28 dic 2017, alle ore 15:00, Holger Hoffstätte >> ha scritto: >> >> >> On 12/28/17 12:19, Paolo Valente wrote: >> (snip half a tech report ;) >> >> So either this or the previous patch ("limit tags for

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

On 01/12/18 06:58, Paolo Valente wrote: > > >> Il giorno 28 dic 2017, alle ore 15:00, Holger Hoffstätte >> ha scritto: >> >> >> On 12/28/17 12:19, Paolo Valente wrote: >> (snip half a tech report ;) >> >> So either this or the previous patch ("limit tags for writes and async I/O" >> can lead

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

> Il giorno 28 dic 2017, alle ore 15:00, Holger Hoffstätte > ha scritto: > > > On 12/28/17 12:19, Paolo Valente wrote: > (snip half a tech report ;) > > So either this or the previous patch ("limit tags for writes and async I/O" > can lead to a hard,

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

> Il giorno 28 dic 2017, alle ore 15:00, Holger Hoffstätte > ha scritto: > > > On 12/28/17 12:19, Paolo Valente wrote: > (snip half a tech report ;) > > So either this or the previous patch ("limit tags for writes and async I/O" > can lead to a hard, unrecoverable hang with heavy writes.

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

On Thu, 28 Dec 2017 15:00:56 +0100, Holger Hoffstätte wrote: > On 12/28/17 12:19, Paolo Valente wrote: > (snip half a tech report ;) > > So either this or the previous patch ("limit tags for writes and async I/O" > can lead to a hard, unrecoverable hang with heavy writes. Since I couldn't > log

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

On Thu, 28 Dec 2017 15:00:56 +0100, Holger Hoffstätte wrote: > On 12/28/17 12:19, Paolo Valente wrote: > (snip half a tech report ;) > > So either this or the previous patch ("limit tags for writes and async I/O" > can lead to a hard, unrecoverable hang with heavy writes. Since I couldn't > log

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

Hi. On čtvrtek 28. prosince 2017 12:19:17 CET Paolo Valente wrote: > To maximise responsiveness, BFQ raises the weight, and performs device > idling, for bfq_queues associated with processes deemed as > interactive. In particular, weight raising has a maximum duration, > equal to the time needed

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

Hi. On čtvrtek 28. prosince 2017 12:19:17 CET Paolo Valente wrote: > To maximise responsiveness, BFQ raises the weight, and performs device > idling, for bfq_queues associated with processes deemed as > interactive. In particular, weight raising has a maximum duration, > equal to the time needed

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

On 12/28/17 12:19, Paolo Valente wrote: (snip half a tech report ;) So either this or the previous patch ("limit tags for writes and async I/O" can lead to a hard, unrecoverable hang with heavy writes. Since I couldn't log into the affected system anymore I couldn't get any stack traces, blk-mq

Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

On 12/28/17 12:19, Paolo Valente wrote: (snip half a tech report ;) So either this or the previous patch ("limit tags for writes and async I/O" can lead to a hard, unrecoverable hang with heavy writes. Since I couldn't log into the affected system anymore I couldn't get any stack traces, blk-mq

[PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

To maximise responsiveness, BFQ raises the weight, and performs device idling, for bfq_queues associated with processes deemed as interactive. In particular, weight raising has a maximum duration, equal to the time needed to start a large application. If a weight-raised process goes on doing I/O

[PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

To maximise responsiveness, BFQ raises the weight, and performs device idling, for bfq_queues associated with processes deemed as interactive. In particular, weight raising has a maximum duration, equal to the time needed to start a large application. If a weight-raised process goes on doing I/O