On 5/18/20 7:23 AM, Mike Rapoport wrote: > On Mon, May 18, 2020 at 02:48:18AM -0700, Guenter Roeck wrote: >> On 5/18/20 1:37 AM, Will Deacon wrote: >>> On Sat, May 16, 2020 at 05:07:50PM -0700, Guenter Roeck wrote: >>>> On Sat, May 16, 2020 at 05:00:50PM -0700, Guenter Roeck wrote: >>>>> On Mon, May 11, 2020 at 09:41:36PM +0100, Will Deacon wrote: >>>>>> Now that the page table allocator can free page table allocations >>>>>> smaller than PAGE_SIZE, reduce the size of the PMD and PTE allocations >>>>>> to avoid needlessly wasting memory. >>>>>> >>>>>> Cc: "David S. Miller" <da...@davemloft.net> >>>>>> Cc: Peter Zijlstra <pet...@infradead.org> >>>>>> Signed-off-by: Will Deacon <w...@kernel.org> >>>>> >>>>> Something in the sparc32 patches in linux-next causes all my sparc32 >>>>> emulations >>>>> to crash. bisect points to this patch, but reverting it doesn't help, and >>>>> neither >>>>> does reverting the rest of the series. >>>>> >>>> Actually, turns out I see the same pattern (lots of scheduling while atomic >>>> followed by 'killing interrupt handler' in cryptomgr_test) with several >>>> powerpc boot tests. I am currently bisecting those crashes. I'll report >>>> the results here as well as soon as I have it. >>> >>> FWIW, I retested my sparc32 patches with PREEMPT=y and I don't see any >>> issues. However, linux-next is a different story, where I don't get very far >>> at all: >>> >>> BUG: Bad page state in process swapper pfn:005b4 > > This one seems to be due to commit 24aab577764f ("mm: memmap_init: > iterate over memblock regions rather that check each PFN") and reverting > it and partially reverting the next cleanup commits makes those > dissapear. sparc32 boot still fails on today's linux-next and mmotm for me > with > > Run /sbin/init as init process > with arguments: > /sbin/init > with environment: > HOME=/ > TERM=linux > Starting init: /sbin/init exists but couldn't execute it (error -14) > > I've tried to bisect mmotm and I've got the first bad commits in > different places in the middle of arch/kmap series [1] so I've added Ira > to CC as well :) > > I'll continue to look into "bad page" on sparc32 > > [1] > https://lore.kernel.org/dri-devel/20200507150004.1423069-11-ira.we...@intel.com/ > >> Here are the bisect results for ppc: >> >> # bad: [bdecf38f228bcca73b31ada98b5b7ba1215eb9c9] Add linux-next specific >> files for 20200515 >> # good: [2ef96a5bb12be62ef75b5828c0aab838ebb29cb8] Linux 5.7-rc5 >> git bisect start 'HEAD' 'v5.7-rc5' > > ... > >> # good: [9b5aa5b43f957f03a1f4a9aff5f7924e2ebbc011] >> arch-kmap_atomic-consolidate-duplicate-code-checkpatch-fixes >> git bisect good 9b5aa5b43f957f03a1f4a9aff5f7924e2ebbc011 >> # bad: [89194ba5ee31567eeee9c81101b334c8e3248198] arch/kmap: define >> kmap_atomic_prot() for all arch's >> git bisect bad 89194ba5ee31567eeee9c81101b334c8e3248198 >> # good: [022785d2bea99f8bc2a37b7b6c525eea26f6ac59] >> arch-kunmap_atomic-consolidate-duplicate-code-checkpatch-fixes >> git bisect good 022785d2bea99f8bc2a37b7b6c525eea26f6ac59 >> # good: [a13c2f39e3f0519ddee57d26cc66ec70e3546106] arch/kmap: don't hard >> code kmap_prot values >> git bisect good a13c2f39e3f0519ddee57d26cc66ec70e3546106 >> # first bad commit: [89194ba5ee31567eeee9c81101b334c8e3248198] arch/kmap: >> define kmap_atomic_prot() for all arch's >> >> I don't know if that is accurate either. Maybe things are so broken >> that bisect gets confused, or the problem is due to interaction >> between different patch series. > > My results with the workaround for sparc32 boot look similar: > > # bad: [2bbf0589bfeb27800c730b76eacf34528eee5418] pci: test for unexpectedly > disabled bridges > git bisect bad 2bbf0589bfeb27800c730b76eacf34528eee5418 > # good: [2ef96a5bb12be62ef75b5828c0aab838ebb29cb8] Linux 5.7-rc5 > git bisect good 2ef96a5bb12be62ef75b5828c0aab838ebb29cb8 > # bad: [e4592f53440c6fd2288e2dcb8c6f5b4d9d40fd35] mm-add-debug_wx-support-fix > git bisect bad e4592f53440c6fd2288e2dcb8c6f5b4d9d40fd35 > # bad: [e4592f53440c6fd2288e2dcb8c6f5b4d9d40fd35] mm-add-debug_wx-support-fix > git bisect bad e4592f53440c6fd2288e2dcb8c6f5b4d9d40fd35 > # good: [e27369856a2d42ae4d84bc2c4ddac1e696c40d7c] mm: remove the prot > argument from vm_map_ram > git bisect good e27369856a2d42ae4d84bc2c4ddac1e696c40d7c > # good: [6911f2b29f6daae2c4b51e6a37f794056d8afabd] mm/page_alloc.c: clear out > zone->lowmem_reserve[] if the zone is empty > git bisect good 6911f2b29f6daae2c4b51e6a37f794056d8afabd > # good: [8cef4726f20ae37c3cf3f7a449f5b8a088247a27] hugetlbfs: clean up > command line processing > git bisect good 8cef4726f20ae37c3cf3f7a449f5b8a088247a27 > # good: [94f38895e0a68ceac3ceece6528123ed3129cedd] arch/kmap: ensure > kmap_prot visibility > git bisect good 94f38895e0a68ceac3ceece6528123ed3129cedd > # skip: [fcc77c28bf9155c681712b25c0f5e6125d10ba2e] kmap: consolidate > kmap_prot definitions > git bisect skip fcc77c28bf9155c681712b25c0f5e6125d10ba2e > # bad: [175a67be7ee750b2aa2a4a2fedeff18fdce787ac] > kmap-consolidate-kmap_prot-definitions-checkpatch-fixes > git bisect bad 175a67be7ee750b2aa2a4a2fedeff18fdce787ac > # bad: [54db8ed321d66a00b6c69bbd5bf7c59809b3fd42] drm: vmwgfx: include > linux/highmem.h > git bisect bad 54db8ed321d66a00b6c69bbd5bf7c59809b3fd42 > # bad: [6671299c829d19c6ceb0fd1a14b690f6115c6d3d] arch/kmap: define > kmap_atomic_prot() for all arch's > git bisect bad 6671299c829d19c6ceb0fd1a14b690f6115c6d3d > # bad: [f800fb6e517710e04391821e4b1908606c8a6b24] arch/kmap: don't hard code > kmap_prot values > git bisect bad f800fb6e517710e04391821e4b1908606c8a6b24 > # first bad commit: [f800fb6e517710e04391821e4b1908606c8a6b24] arch/kmap: > don't hard code kmap_prot values > >
Below is another set of bisect results, from next-20200518. It points to one of your commits. This is for microblaze (big endian) boot failures. Guenter --- # bad: [72bc15d0018ebfbc9c389539d636e2e9a9002b3b] Add linux-next specific files for 20200518 # good: [2ef96a5bb12be62ef75b5828c0aab838ebb29cb8] Linux 5.7-rc5 git bisect start 'HEAD' 'v5.7-rc5' # good: [b5b9a1a40fcf10db8f140c987b715e6816e1292d] Merge remote-tracking branch 'crypto/master' git bisect good b5b9a1a40fcf10db8f140c987b715e6816e1292d # good: [6a349e7cf4cec11b63ca8e3095c990e146f48784] Merge remote-tracking branch 'tip/auto-latest' git bisect good 6a349e7cf4cec11b63ca8e3095c990e146f48784 # good: [0c5e27cea5e173afc1971ce9a521e022c288548c] Merge remote-tracking branch 'staging/staging-next' git bisect good 0c5e27cea5e173afc1971ce9a521e022c288548c # good: [7e90955569a080b17030161db6152917f3b0e061] Merge remote-tracking branch 'hyperv/hyperv-next' git bisect good 7e90955569a080b17030161db6152917f3b0e061 # good: [c0218a9a3a60cf081f5545302d0fc28a8d68059b] fs/buffer.c: add debug print for __getblk_gfp() stall problem git bisect good c0218a9a3a60cf081f5545302d0fc28a8d68059b # good: [bcda3c9d968d3a8b596904fb2ff8009717ffb6ef] Merge branch 'akpm-current/current' git bisect good bcda3c9d968d3a8b596904fb2ff8009717ffb6ef # good: [5b271f59a6aee147db3d7137f6132f74977131c1] kernel: use show_stack_loglvl() git bisect good 5b271f59a6aee147db3d7137f6132f74977131c1 # good: [dec7b12bacc0859e689c4a42714c7bf4d0b98cfd] mm/mmap.c: add more sanity checks to get_unmapped_area() git bisect good dec7b12bacc0859e689c4a42714c7bf4d0b98cfd # bad: [feda7bcd5e1846039cc1a999bf4090b1fee890e8] mm: fix build error for mips of process_madvise git bisect bad feda7bcd5e1846039cc1a999bf4090b1fee890e8 # good: [0533da2f2fa20c28ac5b4573bd6bb0d445638c6a] x86/mm: simplify init_trampoline() and surrounding logic git bisect good 0533da2f2fa20c28ac5b4573bd6bb0d445638c6a # bad: [2b166035a0202b90f5860178b8ae43d41a42117f] mm: consolidate pud_index() and pud_offset() definitions git bisect bad 2b166035a0202b90f5860178b8ae43d41a42117f # bad: [01f489acfb0783379cc764d503477c0f6df49a0b] mm: consolidate pte_index() and pte_offset_*() definitions git bisect bad 01f489acfb0783379cc764d503477c0f6df49a0b # bad: [c57a43e52bf5fdc4152bb17db6e9c5d35569dcfd] mm: pgtable: add shortcuts for accessing kernel PMD and PTE git bisect bad c57a43e52bf5fdc4152bb17db6e9c5d35569dcfd # first bad commit: [c57a43e52bf5fdc4152bb17db6e9c5d35569dcfd] mm: pgtable: add shortcuts for accessing kernel PMD and PTE