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crash.24895
0013-diskdump-Print-total-number-of-dumpable-pa...
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File 0013-diskdump-Print-total-number-of-dumpable-pages.patch of Package crash.24895
From 1425b0504b1e79d88a2d188d7e4c0e7fceba4501 Mon Sep 17 00:00:00 2001 From: Roman Bolshakov <r.bolshakov@yadro.com> Date: Thu, 17 Jun 2021 02:27:34 +0300 Subject: [PATCH] diskdump: Print total number of dumpable pages It's not clear how broken an incomplete dump from the existing debugging prints. Aggregate number of valid pages helps to figure out approximate size of the dump. Size of a complete dump is roughly: EXPECTED_CORE_SIZE = a few pages (kdump headers + bitmaps + descriptors) + (total_valid_pages * block_size) * compression rate An incomplete core would be significantly smaller than: total_valid_pages * block_size Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com> --- diskdump.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/diskdump.c b/diskdump.c index 59b79e1..0f94022 100644 --- a/diskdump.c +++ b/diskdump.c @@ -74,6 +74,7 @@ struct diskdump_data { ulong evictions; /* total evictions done */ ulong cached_reads; ulong *valid_pages; + int max_sect_len; /* highest bucket of valid_pages */ ulong accesses; ulong snapshot_task; }; @@ -877,6 +878,7 @@ restart: } dd->valid_pages = calloc(sizeof(ulong), max_sect_len + 1); + dd->max_sect_len = max_sect_len; for (i = 1; i < max_sect_len + 1; i++) { dd->valid_pages[i] = dd->valid_pages[i - 1]; for (j = 0; j < BITMAP_SECT_LEN; j++, pfn++) @@ -2089,6 +2091,7 @@ __diskdump_memory_dump(FILE *fp) else fprintf(fp, "\n"); fprintf(fp, " valid_pages: %lx\n", (ulong)dd->valid_pages); + fprintf(fp, " total_valid_pages: %ld\n", dd->valid_pages[dd->max_sect_len]); return 0; } -- 2.33.1
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