On 9/27/2018 6:24 PM, Ramsay Jones wrote:
commit 225df8a468 ("ieot: add Index Entry Offset Table (IEOT)
extension", 2018-09-26) added a 'DIV_ROUND_UP(entries, ieot_blocks)
expression, where ieot_blocks was set to zero for a single cpu
platform. This caused an SIGFPE and a core dump in practically
every test in the test-suite, until test t4056-diff-order.sh, which
then went into an infinite loop!
Signed-off-by: Ramsay Jones <ramsay@xxxxxxxxxxxxxxxxxxxx>
---
Hi Ben,
Could you please squash this into the relevant commits on your
'bp/read-cache-parallel' branch. (The first hunk fixes a sparse
warning about using an integer as a NULL pointer).
Absolutely - thanks for the patch.
I don't know how long it's been since I've been on a single core CPU -
I'm sad for you. ;-)
Thanks!
ATB,
Ramsay Jones
read-cache.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/read-cache.c b/read-cache.c
index 6755d58877..40f096f70a 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -2141,7 +2141,7 @@ int do_read_index(struct index_state *istate, const char *path, int must_exist)
size_t extension_offset = 0;
#ifndef NO_PTHREADS
int nr_threads, cpus;
- struct index_entry_offset_table *ieot = 0;
+ struct index_entry_offset_table *ieot = NULL;
#endif
if (istate->initialized)
@@ -2771,7 +2771,7 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
if (ieot_blocks < 1)
ieot_blocks = 1;
cpus = online_cpus();
- if (ieot_blocks > cpus - 1)
+ if (cpus > 1 && ieot_blocks > cpus - 1)
ieot_blocks = cpus - 1;
} else {
ieot_blocks = nr;
