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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2025-02-04 21:17:55 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2025-02-04 21:17:55 +0100 |
| commit | a514a9168554d9c9525b8fa1f6a4ae134cc9ac94 (patch) | |
| tree | 1859f052476a6173ffcfdcd43e284e5ac71579d2 | |
| parent | 423ecd487873ae12c040512ac56686b4f6b8dee9 (diff) | |
| download | hurd-a514a9168554d9c9525b8fa1f6a4ae134cc9ac94.tar.gz hurd-a514a9168554d9c9525b8fa1f6a4ae134cc9ac94.tar.bz2 hurd-a514a9168554d9c9525b8fa1f6a4ae134cc9ac94.zip | |
mach-defpager: Make it print warnings on out-of-swap
To give explanation to processes suddenly crashing with SIGBUS.
| -rw-r--r-- | mach-defpager/default_pager.c | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/mach-defpager/default_pager.c b/mach-defpager/default_pager.c index 2aaa3668..2c30c852 100644 --- a/mach-defpager/default_pager.c +++ b/mach-defpager/default_pager.c @@ -1647,8 +1647,14 @@ ddprintf ("default_read(%lx,%x,%lx,%d)\n",addr,size,offset,block.block.p_index); size, &raddr, &rsize); - if (rc != 0) + if (rc != 0) { + static int warned = 0; + if (!warned) { + printf("(default pager): default_read got %s (%x)\n", strerror(rc), rc); + warned = 1; + } return (PAGER_ERROR); + } /* * If we got the entire page on the first read, return it. @@ -1708,8 +1714,14 @@ default_write(dpager_t ds, * Find block in paging partition */ block = pager_write_offset(ds, offset); - if ( no_block(block) ) + if ( no_block(block) ) { + static int warned = 0; + if (!warned) { + printf("(default pager): default_write got out of room\n"); + warned = 1; + } return (PAGER_ERROR); + } #ifdef CHECKSUM /* @@ -1738,6 +1750,11 @@ ddprintf ("default_write(%lx,%x,%lx,%d)\n",addr,size,offset,block.block.p_index) size, &wsize); if (rc != 0) { + static int warned = 0; + if (!warned) { + printf("(default pager): default_write got %s (%x)\n", strerror(rc), rc); + warned = 1; + } dprintf("*** PAGER ERROR: default_write: "); dprintf("ds=0x%p addr=0x%lx size=0x%x offset=0x%lx resid=0x%x\n", ds, addr, size, offset, wsize); @@ -2453,6 +2470,11 @@ ddprintf ("seqnos_memory_object_data_request <%p>: pager_port_unlock: <%p>[s:%d, pager_port_unlock(ds); if (errors) { + static int warned = 0; + if (!warned) { + printf("(default pager): previous write error for object, killing it\n"); + warned = 1; + } dprintf("%s %s\n", my_name, "dropping data_request because of previous paging errors"); (void) memory_object_data_error(reply_to, @@ -2497,6 +2519,7 @@ ddprintf ("seqnos_memory_object_data_request <%p>: pager_port_unlock: <%p>[s:%d, break; case PAGER_ERROR: + printf("(default pager): data_request read error, lost data\n"); (void) memory_object_data_error( reply_to, offset, @@ -2553,7 +2576,11 @@ ddprintf ("seqnos_memory_object_data_initialize <%p>: pager_port_unlock: <%p>[s: vm_page_size, offset + amount_sent) != PAGER_SUCCESS) { - dprintf("%s%s write error\n", my_name, here); + static int warned = 0; + if (!warned) { + warned = 1; + printf("(default pager): data_initialize write error, losing data\n"); + } dstruct_lock(ds); ds->errors++; dstruct_unlock(ds); @@ -2636,6 +2663,11 @@ seqnos_memory_object_data_return(default_pager_t ds, vm_page_size, offset + amount_sent); if (result != KERN_SUCCESS) { + static int warned = 0; + if (!warned) { + printf("(default pager): data_return write error, losing data\n"); + warned = 1; + } dstruct_lock(ds); ds->errors++; dstruct_unlock(ds); |