RepoMirrors/mars
1
0
Fork 0
mirror of https://github.com/schoebel/mars synced 2024-12-19 05:14:45 +00:00
Code Issues Packages Projects Releases Wiki Activity
3,639 Commits 20 Branches 264 Tags 174 MiB
b0a5594693
Commit Graph

3639 Commits

This Branch
This Branch
All Branches
Author SHA1 Message Date
Thomas Schoebel-Theuer
b0a5594693 say: simplify for newer kernels 2023-08-14 13:55:55 +02:00
Thomas Schoebel-Theuer
d69d069e7f if: adapt to 3d745ea5b09 (kernel 5.7+) 2023-08-14 13:55:42 +02:00
Thomas Schoebel-Theuer
25e3831695 pre-patches/vanilla-5.7/ 2023-08-14 13:55:42 +02:00
Thomas Schoebel-Theuer
fa8ca20220 pre-patches/vanilla-5.6/ 2023-08-14 13:55:42 +02:00
Thomas Schoebel-Theuer
1cb1950819 pre-patches/vanilla-5.5/ 2023-08-14 13:55:42 +02:00
Thomas Schoebel-Theuer
4162752064 doc: checkout BETA BUILD INSTRUCTIONS for QIO 2023-08-14 13:55:17 +02:00
Thomas Schoebel-Theuer
7ff95fa7cf doc: updated build instructions for QIO 2023-08-14 13:55:17 +02:00
Thomas Schoebel-Theuer
8797cca962 pre-patches/vanilla-5.3/ 2023-08-14 13:55:17 +02:00
Thomas Schoebel-Theuer
e71e572e4d pre-patches/vanilla-5.2/ 2023-08-14 13:55:17 +02:00
Thomas Schoebel-Theuer
07da6fb12a pre-patches/vanilla-5.1/ 2023-08-14 13:55:17 +02:00
Thomas Schoebel-Theuer
7d7a002c5a pre-patches/vanilla-5.0/ 2023-08-14 13:55:17 +02:00
Thomas Schoebel-Theuer
26d5f34fbd qio: new brick, replacing historic aio 2023-08-14 13:55:17 +02:00
Thomas Schoebel-Theuer
812cfa685e net: safeguard against strange compiler warnings 2023-08-14 13:54:50 +02:00
Thomas Schoebel-Theuer
46b4739fd7 updated v3 pre-patches/vanilla-5.4/ subversion v3a 2023-08-14 13:54:50 +02:00
Thomas Schoebel-Theuer
b176b72843 aio: adapt to semi-new pre-patch generations 2023-08-14 13:54:50 +02:00
Thomas Schoebel-Theuer
f11993a1ee infra: classify MARS_NEEDS_OLDCOMPAT_FUNCTIONS 2023-08-14 13:54:50 +02:00
Thomas Schoebel-Theuer
063b386dbe infra: rename _comp_*() functions to __oldcompat_*() 2023-08-14 13:54:50 +02:00
Thomas Schoebel-Theuer
2d1c48c53b main: report new pre-patch generation, discourage old one 2023-08-14 13:54:50 +02:00
Thomas Schoebel-Theuer
397f2e93f2 say: adapt to prepatch series v3 2023-08-14 13:54:49 +02:00
Thomas Schoebel-Theuer
c2ee9e0a19 toolchains: resurrect kernel/Kconfig 2023-08-14 13:54:49 +02:00
Thomas Schoebel-Theuer
5211696890 toolchains: git mv kernel/Kconfig -> kernel/Kconfig.v5.4 2023-08-14 13:54:49 +02:00
Thomas Schoebel-Theuer
4da79493dd all: new script adapt-to-upstream-toolchains.sh 2023-08-14 13:54:49 +02:00
Thomas Schoebel-Theuer
de25b2e1ba all: release mars0.1astable168 2023-08-07 16:20:13 +02:00
Thomas Schoebel-Theuer
e273447add copy: improve state barriers 2023-08-07 16:09:50 +02:00
Thomas Schoebel-Theuer
7c59774177 copy: safeguard writeout flag 2023-08-07 16:08:55 +02:00
Thomas Schoebel-Theuer
b53b3777d4 copy: safeguard allocation barriers 2023-08-07 16:08:55 +02:00
Thomas Schoebel-Theuer
7caf2341ea copy: safeguard allocation problems 2023-08-07 16:08:55 +02:00
Thomas Schoebel-Theuer
49c408cac2 copy: constify state table subpages 
I have seen some "strange" behaviour so infrequently, so I am unsure whether
this is a bugfix at all.

I am unsure, whether this _suspected_ bug would be in gcc, or whether
the bug would be mine.

If it is mine, then I assumed that gcc would produce better machine code
than required by ISO C.

Currently, I don't (yet) have the newest version of the ISO C standard,
so I cannot claim the truth.

Whatever: I found the _suspected_ bug by _dissassembling_ before vs after this
patch had been applied:

        .type   copy_brick_construct, @function                                                                 .type   copy_brick_construct, @function
copy_brick_construct:                                                                                   copy_brick_construct:
                                                                                                   >            pushq   %r13    #
        pushq   %r12    #                                                                                       pushq   %r12    #
        pushq   %rbp    #                                                                          |    # block/mars/kernel/mars_copy.c:        st = brick_block_alloc(0, PAGE_SIZE);
        movl    $1155, %edx     #,                                                                 <
                                                                                                   >            pushq   %rbp    #
        pushq   %rbx    #                                                                                       pushq   %rbx    #
        movl    $4096, %esi     #,                                                                 <
        movq    %rdi, %rbx      # brick, brick                                                     |            movq    %rdi, %r12      # brick, brick
                                                                                                   >            movl    $4096, %esi     #,
        xorl    %edi, %edi      #                                                                               xorl    %edi, %edi      #
        call    _brick_block_alloc      #                                                                       call    _brick_block_alloc      #
        movq    %rax, %rdx      #, tmp99                                                           |            movq    %rax, %rbx      #, _res_
        movl    $1024, %ecx     #, tmp102                                                                       movl    $1024, %ecx     #, tmp102
        movq    %rax, 408(%rbx) # tmp99, brick_11(D)->st                                           <
        movq    %rdx, %rdi      # tmp99, tmp99                                                     <
        xorl    %eax, %eax      # tmp101                                                                        xorl    %eax, %eax      # tmp101
        xorl    %ebp, %ebp      # ivtmp.179                                                        |            movq    %rbx, %rdi      # _res_, _res_
        xorl    %r12d, %r12d    # tmp106                                                           <
        rep stosl                                                                                               rep stosl
                                                                                                   >            xorl    %ebp, %ebp      # ivtmp.174
                                                                                                   >            xorl    %r13d, %r13d    # tmp105
.L26:                                                                                                   .L26:
        movl    $1172, %edx     #,                                                                 |            movl    $1177, %edx     #,
        movl    $4096, %esi     #,                                                                              movl    $4096, %esi     #,
        xorl    %edi, %edi      #                                                                               xorl    %edi, %edi      #
        call    _brick_block_alloc      #                                                                       call    _brick_block_alloc      #
        movq    %rax, %rdx      #, tmp103                                                                       movq    %rax, %rdx      #, tmp103
        movq    408(%rbx), %rax # brick_11(D)->st, brick_11(D)->st                                 |            movq    %rdx, (%rbx,%rbp,8)     # tmp103, MEM[base: _res__9, index: ivtmp.174_28, step:
                                                                                                   >            incq    %rbp    # ivtmp.174
        movl    $1024, %ecx     #, tmp107                                                          |            movq    %rax, %rdi      # tmp103, _res_
        movq    %rdx, %rdi      # tmp103, tmp103                                                   |            movl    $1024, %ecx     #, tmp106
        movq    %rdx, (%rax,%rbp)       # tmp103, *_4                                              <
        addq    $8, %rbp        #, ivtmp.179                                                       <
        movl    %r12d, %eax     # tmp106, tmp106                                                   <
        cmpq    $2048, %rbp     #, ivtmp.179                                                       |            cmpq    $256, %rbp      #, ivtmp.174
        rep stosl                                                                                               rep stosl
        jne     .L26    #,                                                                                      jne     .L26    #,
        leaq    376(%rbx), %rdi #, tmp108                                                          |            leaq    376(%r12), %rdi #, tmp107
        movq    $__key.72209, %rdx      #,                                                         |            movq    $__key.72227, %rdx      #,
        movq    $.LC3, %rsi     #,                                                                              movq    $.LC3, %rsi     #,
        call    __init_waitqueue_head   #                                                                       call    __init_waitqueue_head   #
                                                                                                   >    # block/mars/kernel/mars_copy.c:        brick->st = st;
                                                                                                   >            movq    %rbx, 408(%r12) # _res_, brick_10(D)->st
        xorl    %eax, %eax      #                                                                               xorl    %eax, %eax      #
        popq    %rbx    #                                                                                       popq    %rbx    #
        popq    %rbp    #                                                                                       popq    %rbp    #
        popq    %r12    #                                                                                       popq    %r12    #
                                                                                                   >            popq    %r13    #
        ret                                                                                                     ret

Hint: the 2-dimenional array indexing looks _suspicious_ to me.

But analysis is not as easy as one might assume.

Please help me:

If this would be really a bug in gcc (I am not sure), it should be fixed
by the upstream of gcc. Please contact me if you know / can show that

  (a) if it is _really_ a bug (currently very hard to reproduce via MARS), and
  (b) the bug is really in gcc but not mine (unsure for now), and
  (c) how to convert this into a _reproducer_ for the gcc team.

I am not sure whether this is a _full_ reproducer, because it might
depend on the arch (amd64) and/or on specific Linux kernel compile options.

I don't have the time for ananlysis of all of these, or maybe even more
thingies to do.
 2023-08-07 16:08:55 +02:00
Thomas Schoebel-Theuer
602d1380ec copy: reduce address evaluation 
Prototect against future use of ++ operators in arguments ;)
 2023-08-07 16:08:55 +02:00
Thomas Schoebel-Theuer
44f371ca7f copy: convert state lvalues to references 2023-08-07 16:08:52 +02:00
Thomas Schoebel-Theuer
976857a9d7 copy: fix indirect race from index wraparound 2023-08-03 13:24:47 +02:00
Thomas Schoebel-Theuer
d3e70f11da all: release mars0.1astable167 2023-07-13 08:55:48 +02:00
Thomas Schoebel-Theuer
226a241311 marsadm: cron should delete even on closed primaries 2023-07-12 13:22:24 +02:00
Thomas Schoebel-Theuer
6f6ef7a849 marsadm: fix versionlink deletion at cron 2023-07-12 13:15:46 +02:00
Thomas Schoebel-Theuer
da5e5cb9c1 all: release mars0.1astable166 2023-05-30 10:49:55 +02:00
Thomas Schoebel-Theuer
ae8e7611d5 copy: simplify notify_clash() 2023-05-30 10:49:55 +02:00
Thomas Schoebel-Theuer
bdf8d6e7eb copy: safeguard potential race 2023-05-30 10:49:55 +02:00
Thomas Schoebel-Theuer
e58488a777 copy: factor out and simplify reset code 2023-05-30 10:49:50 +02:00
Thomas Schoebel-Theuer
d41ea13d37 copy: reduce clash overhead 2023-05-30 10:05:30 +02:00
Thomas Schoebel-Theuer
8e1e2f81a3 copy: yield CPU more often 2023-05-30 10:05:30 +02:00
Thomas Schoebel-Theuer
31788c0acf all: release mars0.1astable165 2023-05-23 10:47:41 +02:00
Thomas Schoebel-Theuer
1a53f589d4 copy: improve error code 2023-05-23 10:47:39 +02:00
Thomas Schoebel-Theuer
f5fa4a19c1 client: speedup hashing 2023-05-23 10:47:39 +02:00
Thomas Schoebel-Theuer
ada1544100 client: simplify timeout code 2023-05-23 10:47:39 +02:00
Thomas Schoebel-Theuer
63a16833a3 client: tighten checks 2023-05-23 10:47:39 +02:00
Thomas Schoebel-Theuer
f102c3094f infra: tighten list checking 2023-05-23 10:47:39 +02:00
Thomas Schoebel-Theuer
732dbc7a75 client: split _hash_insert list manipulation 2023-05-23 10:47:38 +02:00
Thomas Schoebel-Theuer
925f564e8f net: safeguard socket aliveness 2023-05-23 10:47:38 +02:00
Thomas Schoebel-Theuer
08a627703b all: release mars0.1astable164 2023-05-23 10:19:23 +02:00
Thomas Schoebel-Theuer
272b9d8e46 mem: improve pre-allocation 2023-05-23 10:19:23 +02:00