Date: Mon, 13 May 2019 00:18:16 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Patch to improve mountd performance for reload of exports Message-ID: <YQBPR0101MB22600BD34C94AB09D3D24946DD0F0@YQBPR0101MB2260.CANPRD01.PROD.OUTLOOK.COM>
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Hi, I have created PR#237860 to keep track of a patch I have to try and improve the performance of mountd when reloading exports for an NFS server with a lot of file systems. Peter reported that the nfsd threads would be stalled for 16sec when exports were reloaded (via SIGHUP) for his file server with 72000+ file systems on it. Peter will be testing this patch, but I would appreciate it if anyone else can test it as well. It doesn't matter if your NFS file server only exports a few file systems, because I would like to find out if the patch results in any regressions. (The new capability of incrementally updating the exports in the kernel upon a reload is only enabled if mountd is started with the new "-I" option the patch adds.) If anyone can test the patch (it is the attachment in the PR), please let me know how it goes. Thanks, rickhelp
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