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From 2ad4aa8f265e02d01f77e5d29d8377d849c78d11 Mon Sep 17 00:00:00 2001
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From: Alexey Tikhonov <atikhono@redhat.com>
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Date: Wed, 4 Mar 2020 22:33:17 +0100
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Subject: [PATCH 32/35] mem-cache: added log message in case cache is full
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Reviewed-by: Sumit Bose <sbose@redhat.com>
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---
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src/responder/nss/nsssrv_mmap_cache.c | 22 ++++++++++++++++++++++
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1 file changed, 22 insertions(+)
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diff --git a/src/responder/nss/nsssrv_mmap_cache.c b/src/responder/nss/nsssrv_mmap_cache.c
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index 5e23bbe6f..23df164da 100644
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--- a/src/responder/nss/nsssrv_mmap_cache.c
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+++ b/src/responder/nss/nsssrv_mmap_cache.c
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@@ -371,6 +371,20 @@ static bool sss_mc_is_valid_rec(struct sss_mc_ctx *mcc, struct sss_mc_rec *rec)
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return true;
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}
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+static const char *mc_type_to_str(enum sss_mc_type type)
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+{
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+ switch (type) {
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+ case SSS_MC_PASSWD:
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+ return "PASSWD";
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+ case SSS_MC_GROUP:
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+ return "GROUP";
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+ case SSS_MC_INITGROUPS:
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+ return "INITGROUPS";
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+ default:
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+ return "-UNKNOWN-";
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+ }
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+}
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+
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/* FIXME: This is a very simplistic, inefficient, memory allocator,
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* it will just free the oldest entries regardless of expiration if it
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* cycled the whole free bits map and found no empty slot */
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@@ -438,6 +452,14 @@ static errno_t sss_mc_find_free_slots(struct sss_mc_ctx *mcc,
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} else {
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cur = mcc->next_slot;
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}
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+ if (cur == 0) {
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+ /* inform only once per full loop to avoid excessive spam */
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+ DEBUG(SSSDBG_IMPORTANT_INFO, "mmap cache of type '%s' is full\n",
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+ mc_type_to_str(mcc->type));
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+ sss_log(SSS_LOG_NOTICE, "mmap cache of type '%s' is full, if you see "
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+ "this message often then please consider increase of cache size",
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+ mc_type_to_str(mcc->type));
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+ }
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for (i = 0; i < num_slots; i++) {
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MC_PROBE_BIT(mcc->free_table, cur + i, used);
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if (used) {
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--
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2.21.3
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