From: Andrea Vai <andrea.vai@unipv.it> To: Jens Axboe <axboe@kernel.dk>, Alan Stern <stern@rowland.harvard.edu> Cc: Damien Le Moal <Damien.LeMoal@wdc.com>, Johannes Thumshirn <jthumshirn@suse.de>, USB list <linux-usb@vger.kernel.org>, SCSI development list <linux-scsi@vger.kernel.org>, Himanshu Madhani <himanshu.madhani@cavium.com>, Hannes Reinecke <hare@suse.com>, Ming Lei <ming.lei@redhat.com>, Omar Sandoval <osandov@fb.com>, "Martin K. Petersen" <martin.petersen@oracle.com>, Greg KH <gregkh@linuxfoundation.org>, Hans Holmberg <Hans.Holmberg@wdc.com> Subject: Re: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6 Date: Mon, 04 Nov 2019 17:00:52 +0100 Message-ID: <38f1974fad3a98ca578fcf808a843cbd28325e44.camel@unipv.it> (raw) In-Reply-To: <237f37abfe8a6985f7ff26d5f199a33c18685f90.camel@unipv.it> [-- Attachment #1: Type: text/plain, Size: 2368 bytes --] Il giorno ven, 27/09/2019 alle 17.47 +0200, Andrea Vai ha scritto: > Il giorno mer, 25/09/2019 alle 21.36 +0200, Jens Axboe ha scritto: > > On 9/25/19 9:30 PM, Alan Stern wrote: > > [...] > > > > > > I have attached the two patches to this email. You should start > > with a > > > recent kernel source tree and apply the patches by doing: > > > > > > git apply patch1 patch2 > > > > > > or something similar. Then build a kernel from the new source > > code and > > > test it. > > > > > > Ultimately, if nobody can find a way to restore the sequential > I/O > > > behavior we had prior to commit f664a3cc17b7, that commit may > have > > to > > > be reverted. > > > > Don't use patch1, it's buggy. patch2 should be enough to test the > > theory. As I didn't have any answer, I am quoting my last reply here: > > Sorry, but if I cd into the "linux" directory and run the command > > # git apply -v patch2 > > the result is that the patch cannot be applied correctly: > > -------------------------------------------------------------------- > ---------- > Controllo della patch block/blk-mq.c in corso... > error: durante la ricerca per: > ? > static blk_qc_t blk_mq_make_request(struct request_queue *q, struct > bio *bio)? > {? > const int is_sync = op_is_sync(bio->bi_opf);? > const int is_flush_fua = op_is_flush(bio->bi_opf);? > struct blk_mq_alloc_data data = { .flags = 0};? > struct request *rq;? > > error: patch non riuscita: block/blk-mq.c:1931 > error: block/blk-mq.c: la patch non si applica correttamente > -------------------------------------------------------------------- > ---------- > > The "linux" directory is the one generated by a fresh git clone: > > git clone > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > What am I doing wrong? > Meanwhile, Alan tried to help me and gave me another patch (attached), which doesn't work too, but gives a different error: "The git diff header does not contain information about the file once removed 1 initial component of the path (row 14)" (actually, this is my translation from the original message in Italian: "error: l'intestazione git diff non riporta le informazioni sul file una volta rimosso 1 componente iniziale del percorso (riga 14)") I tested the two patches after a fresh git clone today, a few minutes ago. What can I do? Thank you, Bye Andrea [-- Attachment #2: patch2_alan --] [-- Type: message/rfc822, Size: 296 bytes --]
next prev parent reply index Thread overview: 120+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <307581a490b610c3025ee80f79a465a89d68ed19.camel@unipv.it> 2019-08-20 17:13 ` Alan Stern 2019-08-23 10:39 ` Andrea Vai 2019-08-23 20:42 ` Alan Stern 2019-08-26 6:09 ` Andrea Vai 2019-08-26 16:33 ` Alan Stern 2019-09-18 15:25 ` Andrea Vai 2019-09-18 16:30 ` Alan Stern 2019-09-19 7:33 ` Andrea Vai 2019-09-19 17:54 ` Alan Stern 2019-09-20 7:25 ` Andrea Vai 2019-09-20 7:44 ` Greg KH 2019-09-19 8:26 ` Damien Le Moal 2019-09-19 8:55 ` Ming Lei 2019-09-19 9:09 ` Damien Le Moal 2019-09-19 9:21 ` Ming Lei 2019-09-19 14:01 ` Alan Stern 2019-09-19 14:14 ` Damien Le Moal 2019-09-20 7:03 ` Andrea Vai 2019-09-25 19:30 ` Alan Stern 2019-09-25 19:36 ` Jens Axboe 2019-09-27 15:47 ` Andrea Vai 2019-11-04 16:00 ` Andrea Vai [this message] 2019-11-04 18:20 ` Alan Stern 2019-11-05 11:48 ` Andrea Vai 2019-11-05 18:31 ` Alan Stern 2019-11-05 23:29 ` Jens Axboe 2019-11-06 16:03 ` Alan Stern 2019-11-06 22:13 ` Damien Le Moal 2019-11-07 7:04 ` Andrea Vai 2019-11-07 7:54 ` Damien Le Moal 2019-11-07 18:59 ` Andrea Vai 2019-11-08 8:42 ` Damien Le Moal 2019-11-08 14:33 ` Jens Axboe 2019-11-11 10:46 ` Andrea Vai 2019-11-09 10:09 ` Ming Lei 2019-11-09 22:28 ` Ming Lei 2019-11-11 10:50 ` Andrea Vai 2019-11-11 11:05 ` Ming Lei 2019-11-11 11:13 ` Andrea Vai 2019-11-22 19:16 ` Andrea Vai 2019-11-23 7:28 ` Ming Lei 2019-11-23 15:44 ` Andrea Vai 2019-11-25 3:54 ` Ming Lei 2019-11-25 10:11 ` Andrea Vai 2019-11-25 10:29 ` Ming Lei 2019-11-25 14:58 ` Andrea Vai 2019-11-25 15:15 ` Ming Lei 2019-11-25 18:51 ` Andrea Vai 2019-11-26 2:32 ` Ming Lei 2019-11-26 7:46 ` Andrea Vai 2019-11-26 9:15 ` Ming Lei 2019-11-26 10:24 ` Ming Lei 2019-11-26 11:14 ` Andrea Vai 2019-11-27 2:05 ` Ming Lei 2019-11-27 9:39 ` Andrea Vai 2019-11-27 13:08 ` Ming Lei 2019-11-27 15:01 ` Andrea Vai 2019-11-27 0:21 ` Finn Thain 2019-11-27 8:14 ` AW: " Schmid, Carsten 2019-11-27 21:49 ` Finn Thain 2019-11-28 7:46 ` Andrea Vai 2019-11-28 8:12 ` AW: " Schmid, Carsten 2019-11-28 11:40 ` Andrea Vai 2019-11-28 17:39 ` Alan Stern 2019-11-28 9:17 ` Ming Lei 2019-11-28 17:34 ` Andrea Vai 2019-11-29 0:57 ` Ming Lei 2019-11-29 2:35 ` Ming Lei 2019-11-29 14:41 ` Andrea Vai 2019-12-03 2:23 ` Ming Lei 2019-12-10 7:35 ` Andrea Vai 2019-12-10 8:05 ` Ming Lei 2019-12-11 2:41 ` Theodore Y. Ts'o 2019-12-11 4:00 ` Ming Lei 2019-12-11 16:07 ` Theodore Y. Ts'o 2019-12-11 21:33 ` Ming Lei 2019-12-12 7:34 ` Andrea Vai 2019-12-18 8:25 ` Andrea Vai 2019-12-18 9:48 ` Ming Lei [not found] ` <b1b6a0e9d690ecd9432025acd2db4ac09f834040.camel@unipv.it> 2019-12-23 13:08 ` Ming Lei 2019-12-23 14:02 ` Andrea Vai 2019-12-24 1:32 ` Ming Lei 2019-12-24 8:04 ` Andrea Vai 2019-12-24 8:47 ` Ming Lei 2019-12-23 16:26 ` Theodore Y. Ts'o 2019-12-23 16:29 ` Andrea Vai 2019-12-23 17:22 ` Theodore Y. Ts'o 2019-12-23 18:45 ` Andrea Vai 2019-12-23 19:53 ` Theodore Y. Ts'o 2019-12-24 1:27 ` Ming Lei 2019-12-24 6:49 ` Andrea Vai 2019-12-24 8:51 ` Andrea Vai 2019-12-24 9:35 ` Ming Lei 2019-12-25 5:17 ` Theodore Y. Ts'o 2019-12-26 2:27 ` Ming Lei 2019-12-26 3:30 ` Theodore Y. Ts'o 2019-12-26 8:37 ` Ming Lei 2020-01-07 7:51 ` Andrea Vai [not found] ` <20200101074310.10904-1-hdanton@sina.com> 2020-01-01 13:53 ` slow IO on USB media Ming Lei 2019-11-29 11:44 ` AW: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6 Bernd Schubert 2019-12-02 7:01 ` Andrea Vai 2019-11-28 17:10 ` Andrea Vai [not found] <e3f87757f7a0fdf551e911ad32fc8122eebe04c7.camel@unipv.it> 2019-08-13 19:52 ` Alan Stern 2019-07-02 10:46 Andrea Vai 2019-07-02 11:51 ` Johannes Thumshirn 2019-07-02 22:36 ` Andrea Vai 2019-07-03 7:29 ` Johannes Thumshirn 2019-07-03 14:23 ` Alan Stern 2019-07-06 22:06 ` Andrea Vai 2019-07-08 15:38 ` Alan Stern 2019-07-02 12:01 ` Ming Lei 2019-07-02 22:39 ` Andrea Vai 2019-07-03 2:01 ` Ming Lei 2019-07-03 5:11 ` Andrea Vai 2019-07-03 6:36 ` Ming Lei 2019-07-03 15:27 ` Chris Murphy 2019-07-06 9:33 ` Andrea Vai 2019-07-08 1:01 ` Ming Lei 2019-07-09 21:18 ` Andrea Vai 2019-07-10 2:44 ` Ming Lei
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