Go back to using sbuf_new() with a preallocated large buffer, to avoid
triggering an sbuf auto-drain copyout while holding a lock. Pointed out by: jhb Pointy hat: ian
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=280014
@ -604,7 +604,8 @@ sysctl_tcp_hc_list(SYSCTL_HANDLER_ARGS)
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char ip6buf[INET6_ADDRSTRLEN];
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#endif
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sbuf_new_for_sysctl(&sb, NULL, linesize, req);
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sbuf_new(&sb, NULL, linesize * (V_tcp_hostcache.cache_count + 1),
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SBUF_INCLUDENUL);
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sbuf_printf(&sb,
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"\nIP address MTU SSTRESH RTT RTTVAR BANDWIDTH "
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@ -642,6 +643,8 @@ sysctl_tcp_hc_list(SYSCTL_HANDLER_ARGS)
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}
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#undef msec
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error = sbuf_finish(&sb);
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if (error == 0)
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error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
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sbuf_delete(&sb);
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return(error);
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}
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