From: Qu Wenruo <quwenruo.btrfs@gmx.com>
To: dsterba@suse.cz, Qu Wenruo <wqu@suse.com>, linux-btrfs@vger.kernel.org
Subject: Re: [PATCH v2 07/17] btrfs: make rbio_add_io_page() subpage compatible
Date: Thu, 14 Apr 2022 07:28:09 +0800 [thread overview]
Message-ID: <5b296828-65fb-b684-dedc-6f018e5ece4e@gmx.com> (raw)
In-Reply-To: <20220413191456.GN15609@twin.jikos.cz>
On 2022/4/14 03:14, David Sterba wrote:
> There's an assertion failure reported by btrfs/023
>
> On Tue, Apr 12, 2022 at 05:32:57PM +0800, Qu Wenruo wrote:
>> +static int rbio_add_io_sector(struct btrfs_raid_bio *rbio,
>> + struct bio_list *bio_list,
>> + struct sector_ptr *sector,
>> + unsigned int stripe_nr,
>> + unsigned int sector_nr,
>> + unsigned long bio_max_len, unsigned int opf)
>> {
>> + const u32 sectorsize = rbio->bioc->fs_info->sectorsize;
>> struct bio *last = bio_list->tail;
>> int ret;
>> struct bio *bio;
>> struct btrfs_io_stripe *stripe;
>> u64 disk_start;
>>
>> + /*
>> + * NOTE: here stripe_nr has taken device replace into consideration,
>> + * thus it can be larger than rbio->real_stripe.
>> + * So here we check against bioc->num_stripes, not rbio->real_stripes.
>> + */
>> + ASSERT(stripe_nr >= 0 && stripe_nr < rbio->bioc->num_stripes);
>> + ASSERT(sector_nr >= 0 && sector_nr < rbio->stripe_nsectors);
>> + ASSERT(sector->page);
>
> This one ^^^
Failed to reproduce here, both x86_64 and aarch64 survived over 64 loops
of btrfs/023.
Although that's withy my github branch. Let me check the current branch
to see what's wrong.
Thanks,
Qu
>
> [ 2280.705765] assertion failed: sector->page, in fs/btrfs/raid56.c:1145
> [ 2280.707844] ------------[ cut here ]------------
> [ 2280.709401] kernel BUG at fs/btrfs/ctree.h:3614!
> [ 2280.711084] invalid opcode: 0000 [#1] PREEMPT SMP
> [ 2280.712822] CPU: 3 PID: 4084 Comm: kworker/u8:2 Not tainted 5.18.0-rc2-default+ #1697
> [ 2280.715648] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a-rebuilt.opensuse.org 04/01/2014
> [ 2280.719656] Workqueue: btrfs-rmw btrfs_work_helper [btrfs]
> [ 2280.721775] RIP: 0010:assertfail.constprop.0+0x18/0x1a [btrfs]
> [ 2280.729575] RSP: 0018:ffffad6d071afda0 EFLAGS: 00010246
> [ 2280.730844] RAX: 0000000000000039 RBX: 0000000000000000 RCX: 0000000000000000
> [ 2280.732449] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 00000000ffffffff
> [ 2280.733992] RBP: ffff8e51d5465000 R08: 0000000000000003 R09: 0000000000000002
> [ 2280.735535] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000003
> [ 2280.737093] R13: ffff8e51d5465000 R14: ffff8e51d5465d78 R15: 0000000000001000
> [ 2280.738613] FS: 0000000000000000(0000) GS:ffff8e523dc00000(0000) knlGS:0000000000000000
> [ 2280.740392] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 2280.741794] CR2: 000055f48fe51ab0 CR3: 000000001f805001 CR4: 0000000000170ea0
> [ 2280.743532] Call Trace:
> [ 2280.744136] <TASK>
> [ 2280.744701] rbio_add_io_sector.cold+0x11/0x33 [btrfs]
> [ 2280.745846] ? _raw_spin_unlock_irq+0x2f/0x50
> [ 2280.746782] raid56_rmw_stripe.isra.0+0x153/0x320 [btrfs]
> [ 2280.747965] btrfs_work_helper+0xd6/0x1d0 [btrfs]
> [ 2280.749018] process_one_work+0x264/0x5f0
> [ 2280.749806] worker_thread+0x52/0x3b0
> [ 2280.750523] ? process_one_work+0x5f0/0x5f0
> [ 2280.751395] kthread+0xea/0x110
> [ 2280.752097] ? kthread_complete_and_exit+0x20/0x20
> [ 2280.753112] ret_from_fork+0x1f/0x30
>
>
>> +
>> + /* We don't yet support subpage, thus pgoff should always be 0 */
>> + ASSERT(sector->pgoff == 0);
>> +
>> stripe = &rbio->bioc->stripes[stripe_nr];
>> - disk_start = stripe->physical + (page_index << PAGE_SHIFT);
>> + disk_start = stripe->physical + sector_nr * sectorsize;
>>
>> /* if the device is missing, just fail this stripe */
>> if (!stripe->dev->bdev)
>> @@ -1156,8 +1226,9 @@ static int rbio_add_io_page(struct btrfs_raid_bio *rbio,
>> */
>> if (last_end == disk_start && !last->bi_status &&
>> last->bi_bdev == stripe->dev->bdev) {
>> - ret = bio_add_page(last, page, PAGE_SIZE, 0);
>> - if (ret == PAGE_SIZE)
>> + ret = bio_add_page(last, sector->page, sectorsize,
>> + sector->pgoff);
>> + if (ret == sectorsize)
>> return 0;
>> }
>> }
>> @@ -1168,7 +1239,7 @@ static int rbio_add_io_page(struct btrfs_raid_bio *rbio,
>> bio->bi_iter.bi_sector = disk_start >> 9;
>> bio->bi_private = rbio;
>>
>> - bio_add_page(bio, page, PAGE_SIZE, 0);
>> + bio_add_page(bio, sector->page, sectorsize, sector->pgoff);
>> bio_list_add(bio_list, bio);
>> return 0;
>> }
>> @@ -1265,7 +1336,7 @@ static noinline void finish_rmw(struct btrfs_raid_bio *rbio)
>> void **pointers = rbio->finish_pointers;
>> int nr_data = rbio->nr_data;
>> int stripe;
>> - int pagenr;
>> + int sectornr;
>> bool has_qstripe;
>> struct bio_list bio_list;
>> struct bio *bio;
>> @@ -1309,16 +1380,16 @@ static noinline void finish_rmw(struct btrfs_raid_bio *rbio)
>> else
>> clear_bit(RBIO_CACHE_READY_BIT, &rbio->flags);
>>
>> - for (pagenr = 0; pagenr < rbio->stripe_npages; pagenr++) {
>> + for (sectornr = 0; sectornr < rbio->stripe_nsectors; sectornr++) {
>> struct page *p;
>> /* first collect one page from each data stripe */
>> for (stripe = 0; stripe < nr_data; stripe++) {
>> - p = page_in_rbio(rbio, stripe, pagenr, 0);
>> + p = page_in_rbio(rbio, stripe, sectornr, 0);
>> pointers[stripe] = kmap_local_page(p);
>> }
>>
>> /* then add the parity stripe */
>> - p = rbio_pstripe_page(rbio, pagenr);
>> + p = rbio_pstripe_page(rbio, sectornr);
>> SetPageUptodate(p);
>> pointers[stripe++] = kmap_local_page(p);
>>
>> @@ -1328,7 +1399,7 @@ static noinline void finish_rmw(struct btrfs_raid_bio *rbio)
>> * raid6, add the qstripe and call the
>> * library function to fill in our p/q
>> */
>> - p = rbio_qstripe_page(rbio, pagenr);
>> + p = rbio_qstripe_page(rbio, sectornr);
>> SetPageUptodate(p);
>> pointers[stripe++] = kmap_local_page(p);
>>
>> @@ -1349,19 +1420,19 @@ static noinline void finish_rmw(struct btrfs_raid_bio *rbio)
>> * everything else.
>> */
>> for (stripe = 0; stripe < rbio->real_stripes; stripe++) {
>> - for (pagenr = 0; pagenr < rbio->stripe_npages; pagenr++) {
>> - struct page *page;
>> + for (sectornr = 0; sectornr < rbio->stripe_nsectors; sectornr++) {
>> + struct sector_ptr *sector;
>> +
>> if (stripe < rbio->nr_data) {
>> - page = page_in_rbio(rbio, stripe, pagenr, 1);
>> - if (!page)
>> + sector = sector_in_rbio(rbio, stripe, sectornr, 1);
>> + if (!sector)
>> continue;
>> } else {
>> - page = rbio_stripe_page(rbio, stripe, pagenr);
>> + sector = rbio_stripe_sector(rbio, stripe, sectornr);
>> }
>>
>> - ret = rbio_add_io_page(rbio, &bio_list,
>> - page, stripe, pagenr, rbio->stripe_len,
>> - REQ_OP_WRITE);
>> + ret = rbio_add_io_sector(rbio, &bio_list, sector, stripe,
>> + sectornr, rbio->stripe_len, REQ_OP_WRITE);
>> if (ret)
>> goto cleanup;
>> }
>> @@ -1374,20 +1445,21 @@ static noinline void finish_rmw(struct btrfs_raid_bio *rbio)
>> if (!bioc->tgtdev_map[stripe])
>> continue;
>>
>> - for (pagenr = 0; pagenr < rbio->stripe_npages; pagenr++) {
>> - struct page *page;
>> + for (sectornr = 0; sectornr < rbio->stripe_nsectors; sectornr++) {
>> + struct sector_ptr *sector;
>> +
>> if (stripe < rbio->nr_data) {
>> - page = page_in_rbio(rbio, stripe, pagenr, 1);
>> - if (!page)
>> + sector = sector_in_rbio(rbio, stripe, sectornr, 1);
>> + if (!sector)
>> continue;
>> } else {
>> - page = rbio_stripe_page(rbio, stripe, pagenr);
>> + sector = rbio_stripe_sector(rbio, stripe, sectornr);
>> }
>>
>> - ret = rbio_add_io_page(rbio, &bio_list, page,
>> - rbio->bioc->tgtdev_map[stripe],
>> - pagenr, rbio->stripe_len,
>> - REQ_OP_WRITE);
>> + ret = rbio_add_io_sector(rbio, &bio_list, sector,
>> + rbio->bioc->tgtdev_map[stripe],
>> + sectornr, rbio->stripe_len,
>> + REQ_OP_WRITE);
>> if (ret)
>> goto cleanup;
>> }
>> @@ -1563,7 +1635,7 @@ static int raid56_rmw_stripe(struct btrfs_raid_bio *rbio)
>> int bios_to_read = 0;
>> struct bio_list bio_list;
>> int ret;
>> - int pagenr;
>> + int sectornr;
>> int stripe;
>> struct bio *bio;
>>
>> @@ -1581,28 +1653,29 @@ static int raid56_rmw_stripe(struct btrfs_raid_bio *rbio)
>> * stripe
>> */
>> for (stripe = 0; stripe < rbio->nr_data; stripe++) {
>> - for (pagenr = 0; pagenr < rbio->stripe_npages; pagenr++) {
>> - struct page *page;
>> + for (sectornr = 0; sectornr < rbio->stripe_nsectors; sectornr++) {
>> + struct sector_ptr *sector;
>> +
>> /*
>> - * we want to find all the pages missing from
>> + * We want to find all the sectors missing from
>> * the rbio and read them from the disk. If
>> - * page_in_rbio finds a page in the bio list
>> + * sector_in_rbio() finds a page in the bio list
>> * we don't need to read it off the stripe.
>> */
>> - page = page_in_rbio(rbio, stripe, pagenr, 1);
>> - if (page)
>> + sector = sector_in_rbio(rbio, stripe, sectornr, 1);
>> + if (sector)
>> continue;
>>
>> - page = rbio_stripe_page(rbio, stripe, pagenr);
>> + sector = rbio_stripe_sector(rbio, stripe, sectornr);
>> /*
>> - * the bio cache may have handed us an uptodate
>> + * The bio cache may have handed us an uptodate
>> * page. If so, be happy and use it
>> */
>> - if (PageUptodate(page))
>> + if (sector->uptodate)
>> continue;
>>
>> - ret = rbio_add_io_page(rbio, &bio_list, page,
>> - stripe, pagenr, rbio->stripe_len,
>> + ret = rbio_add_io_sector(rbio, &bio_list, sector,
>> + stripe, sectornr, rbio->stripe_len,
>> REQ_OP_READ);
>> if (ret)
>> goto cleanup;
>> @@ -2107,7 +2180,7 @@ static int __raid56_parity_recover(struct btrfs_raid_bio *rbio)
>> int bios_to_read = 0;
>> struct bio_list bio_list;
>> int ret;
>> - int pagenr;
>> + int sectornr;
>> int stripe;
>> struct bio *bio;
>>
>> @@ -2130,21 +2203,20 @@ static int __raid56_parity_recover(struct btrfs_raid_bio *rbio)
>> continue;
>> }
>>
>> - for (pagenr = 0; pagenr < rbio->stripe_npages; pagenr++) {
>> - struct page *p;
>> + for (sectornr = 0; sectornr < rbio->stripe_nsectors; sectornr++) {
>> + struct sector_ptr *sector;
>>
>> /*
>> * the rmw code may have already read this
>> * page in
>> */
>> - p = rbio_stripe_page(rbio, stripe, pagenr);
>> - if (PageUptodate(p))
>> + sector = rbio_stripe_sector(rbio, stripe, sectornr);
>> + if (sector->uptodate)
>> continue;
>>
>> - ret = rbio_add_io_page(rbio, &bio_list,
>> - rbio_stripe_page(rbio, stripe, pagenr),
>> - stripe, pagenr, rbio->stripe_len,
>> - REQ_OP_READ);
>> + ret = rbio_add_io_sector(rbio, &bio_list, sector,
>> + stripe, sectornr,
>> + rbio->stripe_len, REQ_OP_READ);
>> if (ret < 0)
>> goto cleanup;
>> }
>> @@ -2399,7 +2471,7 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
>> unsigned long *pbitmap = rbio->finish_pbitmap;
>> int nr_data = rbio->nr_data;
>> int stripe;
>> - int pagenr;
>> + int sectornr;
>> bool has_qstripe;
>> struct page *p_page = NULL;
>> struct page *q_page = NULL;
>> @@ -2419,7 +2491,7 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
>>
>> if (bioc->num_tgtdevs && bioc->tgtdev_map[rbio->scrubp]) {
>> is_replace = 1;
>> - bitmap_copy(pbitmap, rbio->dbitmap, rbio->stripe_npages);
>> + bitmap_copy(pbitmap, rbio->dbitmap, rbio->stripe_nsectors);
>> }
>>
>> /*
>> @@ -2453,12 +2525,12 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
>> /* Map the parity stripe just once */
>> pointers[nr_data] = kmap_local_page(p_page);
>>
>> - for_each_set_bit(pagenr, rbio->dbitmap, rbio->stripe_npages) {
>> + for_each_set_bit(sectornr, rbio->dbitmap, rbio->stripe_nsectors) {
>> struct page *p;
>> void *parity;
>> /* first collect one page from each data stripe */
>> for (stripe = 0; stripe < nr_data; stripe++) {
>> - p = page_in_rbio(rbio, stripe, pagenr, 0);
>> + p = page_in_rbio(rbio, stripe, sectornr, 0);
>> pointers[stripe] = kmap_local_page(p);
>> }
>>
>> @@ -2473,13 +2545,13 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
>> }
>>
>> /* Check scrubbing parity and repair it */
>> - p = rbio_stripe_page(rbio, rbio->scrubp, pagenr);
>> + p = rbio_stripe_page(rbio, rbio->scrubp, sectornr);
>> parity = kmap_local_page(p);
>> if (memcmp(parity, pointers[rbio->scrubp], PAGE_SIZE))
>> copy_page(parity, pointers[rbio->scrubp]);
>> else
>> /* Parity is right, needn't writeback */
>> - bitmap_clear(rbio->dbitmap, pagenr, 1);
>> + bitmap_clear(rbio->dbitmap, sectornr, 1);
>> kunmap_local(parity);
>>
>> for (stripe = nr_data - 1; stripe >= 0; stripe--)
>> @@ -2499,12 +2571,13 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
>> * higher layers (the bio_list in our rbio) and our p/q. Ignore
>> * everything else.
>> */
>> - for_each_set_bit(pagenr, rbio->dbitmap, rbio->stripe_npages) {
>> - struct page *page;
>> + for_each_set_bit(sectornr, rbio->dbitmap, rbio->stripe_nsectors) {
>> + struct sector_ptr *sector;
>>
>> - page = rbio_stripe_page(rbio, rbio->scrubp, pagenr);
>> - ret = rbio_add_io_page(rbio, &bio_list, page, rbio->scrubp,
>> - pagenr, rbio->stripe_len, REQ_OP_WRITE);
>> + sector = rbio_stripe_sector(rbio, rbio->scrubp, sectornr);
>> + ret = rbio_add_io_sector(rbio, &bio_list, sector, rbio->scrubp,
>> + sectornr, rbio->stripe_len,
>> + REQ_OP_WRITE);
>> if (ret)
>> goto cleanup;
>> }
>> @@ -2512,13 +2585,13 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
>> if (!is_replace)
>> goto submit_write;
>>
>> - for_each_set_bit(pagenr, pbitmap, rbio->stripe_npages) {
>> - struct page *page;
>> + for_each_set_bit(sectornr, pbitmap, rbio->stripe_nsectors) {
>> + struct sector_ptr *sector;
>>
>> - page = rbio_stripe_page(rbio, rbio->scrubp, pagenr);
>> - ret = rbio_add_io_page(rbio, &bio_list, page,
>> + sector = rbio_stripe_sector(rbio, rbio->scrubp, sectornr);
>> + ret = rbio_add_io_sector(rbio, &bio_list, sector,
>> bioc->tgtdev_map[rbio->scrubp],
>> - pagenr, rbio->stripe_len, REQ_OP_WRITE);
>> + sectornr, rbio->stripe_len, REQ_OP_WRITE);
>> if (ret)
>> goto cleanup;
>> }
>> @@ -2650,7 +2723,7 @@ static void raid56_parity_scrub_stripe(struct btrfs_raid_bio *rbio)
>> int bios_to_read = 0;
>> struct bio_list bio_list;
>> int ret;
>> - int pagenr;
>> + int sectornr;
>> int stripe;
>> struct bio *bio;
>>
>> @@ -2666,28 +2739,30 @@ static void raid56_parity_scrub_stripe(struct btrfs_raid_bio *rbio)
>> * stripe
>> */
>> for (stripe = 0; stripe < rbio->real_stripes; stripe++) {
>> - for_each_set_bit(pagenr, rbio->dbitmap, rbio->stripe_npages) {
>> - struct page *page;
>> + for_each_set_bit(sectornr, rbio->dbitmap,
>> + rbio->stripe_nsectors) {
>> + struct sector_ptr *sector;
>> /*
>> - * we want to find all the pages missing from
>> + * We want to find all the sectors missing from
>> * the rbio and read them from the disk. If
>> - * page_in_rbio finds a page in the bio list
>> + * sector_in_rbio() finds a sector in the bio list
>> * we don't need to read it off the stripe.
>> */
>> - page = page_in_rbio(rbio, stripe, pagenr, 1);
>> - if (page)
>> + sector = sector_in_rbio(rbio, stripe, sectornr, 1);
>> + if (sector)
>> continue;
>>
>> - page = rbio_stripe_page(rbio, stripe, pagenr);
>> + sector = rbio_stripe_sector(rbio, stripe, sectornr);
>> /*
>> - * the bio cache may have handed us an uptodate
>> - * page. If so, be happy and use it
>> + * The bio cache may have handed us an uptodate
>> + * sector. If so, be happy and use it
>> */
>> - if (PageUptodate(page))
>> + if (sector->uptodate)
>> continue;
>>
>> - ret = rbio_add_io_page(rbio, &bio_list, page, stripe,
>> - pagenr, rbio->stripe_len, REQ_OP_READ);
>> + ret = rbio_add_io_sector(rbio, &bio_list, sector,
>> + stripe, sectornr,
>> + rbio->stripe_len, REQ_OP_READ);
>> if (ret)
>> goto cleanup;
>> }
>> --
>> 2.35.1
next prev parent reply other threads:[~2022-04-13 23:28 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-12 9:32 [PATCH v2 00/17] btrfs: add subpage support for RAID56 Qu Wenruo
2022-04-12 9:32 ` [PATCH v2 01/17] btrfs: reduce width for stripe_len from u64 to u32 Qu Wenruo
2022-04-12 9:32 ` [PATCH v2 02/17] btrfs: open-code rbio_nr_pages() Qu Wenruo
2022-04-12 9:32 ` [PATCH v2 03/17] btrfs: make btrfs_raid_bio more compact Qu Wenruo
2022-04-12 9:32 ` [PATCH v2 04/17] btrfs: introduce new cached members for btrfs_raid_bio Qu Wenruo
2022-04-15 5:31 ` Christoph Hellwig
2022-04-15 5:34 ` Qu Wenruo
2022-04-15 5:45 ` Christoph Hellwig
2022-04-12 9:32 ` [PATCH v2 05/17] btrfs: introduce btrfs_raid_bio::stripe_sectors Qu Wenruo
2022-04-12 9:32 ` [PATCH v2 06/17] btrfs: introduce btrfs_raid_bio::bio_sectors Qu Wenruo
2022-04-12 9:32 ` [PATCH v2 07/17] btrfs: make rbio_add_io_page() subpage compatible Qu Wenruo
2022-04-13 19:14 ` David Sterba
2022-04-13 23:28 ` Qu Wenruo [this message]
2022-04-14 0:43 ` Qu Wenruo
2022-04-14 10:59 ` Qu Wenruo
2022-04-14 15:51 ` David Sterba
2022-04-14 22:48 ` Qu Wenruo
2022-04-21 15:44 ` David Sterba
2022-04-14 15:43 ` David Sterba
2022-04-14 17:51 ` David Sterba
2022-04-14 22:28 ` Qu Wenruo
2022-04-21 16:24 ` David Sterba
2022-04-12 9:32 ` [PATCH v2 08/17] btrfs: make finish_parity_scrub() " Qu Wenruo
2022-04-12 9:32 ` [PATCH v2 09/17] btrfs: make __raid_recover_endio_io() subpage compatibable Qu Wenruo
2022-04-12 9:33 ` [PATCH v2 10/17] btrfs: make finish_rmw() subpage compatible Qu Wenruo
2022-04-12 9:33 ` [PATCH v2 11/17] btrfs: open-code rbio_stripe_page_index() Qu Wenruo
2022-04-12 9:33 ` [PATCH v2 12/17] btrfs: make raid56_add_scrub_pages() subpage compatible Qu Wenruo
2022-04-12 9:33 ` [PATCH v2 13/17] btrfs: remove btrfs_raid_bio::bio_pages array Qu Wenruo
2022-04-12 9:33 ` [PATCH v2 14/17] btrfs: make set_bio_pages_uptodate() subpage compatible Qu Wenruo
2022-04-12 9:33 ` [PATCH v2 15/17] btrfs: make steal_rbio() " Qu Wenruo
2022-04-12 9:33 ` [PATCH v2 16/17] btrfs: make alloc_rbio_essential_pages() " Qu Wenruo
2022-04-12 9:33 ` [PATCH v2 17/17] btrfs: enable subpage support for RAID56 Qu Wenruo
2022-04-12 17:42 ` [PATCH v2 00/17] btrfs: add " David Sterba
2022-04-13 14:46 ` David Sterba
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for how to clone and mirror all data and code used for this inbox