From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ADBD51B2503; Wed, 21 Aug 2024 18:34:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724265256; cv=none; b=c8IKnBtqGxIjhIJPGI1RaZbgJtAfyH8Um0zUM5jnBdFn+HlcMSvU572LHGnoEGGgW8Er6xkWTCAxyR5o+0J6mxqdcuqAw+HPjEpTSPu+ED69XNqSV7PYjbgBGXcL+JOHi9mVfsy6MQdr9yFNo5gxp6YZygwTViU8E2AzmJuCX3Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724265256; c=relaxed/simple; bh=U81ZzTMf6LvugqxGeiIcta0FrhXLNX/BqQF+hacDORo=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=rvEyROBIoBaopx/QKPH79qvpbprQ1p5/aZyMW7yCcnKmYFo+aWXDl+n0QNkXk0hBmo8zXuVOFFRUGt/POBAA++J55nE6kvUnGOMJer3Pz3O9UNJ6X8wEr7ct+QNDc39vMpPVocIMq0/MS0c5TR9gw4UxTxtttRA4mYjM5wTxsZw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dbUdz5ov; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="dbUdz5ov" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 96E2AC32781; Wed, 21 Aug 2024 18:34:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724265256; bh=U81ZzTMf6LvugqxGeiIcta0FrhXLNX/BqQF+hacDORo=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=dbUdz5ovZC1/klChNlkAMWILOtowkkNLm1FE/TuD4SYQ4l5Zhmd5qIWR/EeLbxsbq +6HE/3qi3nqtsvckIM99aHvwXRWa/2rs3OzOywpbtSvncFwLRiXLEjdVYC6OOlzSJE 8DsrdCY3t9sgH6IMu7gCelTMp1kGTHjRYrOoUlwV73a8tcqyQNRIDjy6j0eBh/yrXR ev4zCZOIZvQir99jhcZsWR2qZttGMMUMJSwIfsGhECAdEnn8HEICnbsj0VZTgxfoCX JsgNuIXzaBpZaigZNESBUdaC6RmHNBPVkRLVHqE+9csV8i/gPnm9t8Znsi2fO0HPUK XRgUYawkBBSOg== Message-ID: <4f676e066189aa5b9c06bb3c71148753365fccca.camel@kernel.org> Subject: Re: [PATCH v12 20/24] nfsd: use GC for nfsd_file returned by nfsd_file_acquire_local From: Jeff Layton To: Mike Snitzer , linux-nfs@vger.kernel.org Cc: Chuck Lever , Anna Schumaker , Trond Myklebust , NeilBrown , linux-fsdevel@vger.kernel.org Date: Wed, 21 Aug 2024 14:34:14 -0400 In-Reply-To: <20240819181750.70570-21-snitzer@kernel.org> References: <20240819181750.70570-1-snitzer@kernel.org> <20240819181750.70570-21-snitzer@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV 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Mon, 2024-08-19 at 14:17 -0400, Mike Snitzer wrote: > Offers performance improvements if/when a file is reopened before > launderette cleans it from the filecache's LRU. >=20 > Suggested-by: Jeff Layton > Signed-off-by: Mike Snitzer > --- > =C2=A0fs/nfsd/filecache.c | 9 +++++---- > =C2=A01 file changed, 5 insertions(+), 4 deletions(-) >=20 > diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c > index 56be99a3667a..447faa194166 100644 > --- a/fs/nfsd/filecache.c > +++ b/fs/nfsd/filecache.c > @@ -1197,9 +1197,10 @@ nfsd_file_acquire(struct svc_rqst *rqstp, struct s= vc_fh *fhp, > =C2=A0 * a file.=C2=A0 The security implications of this should be carefu= lly > =C2=A0 * considered before use. > =C2=A0 * > - * The nfsd_file_object returned by this API is reference-counted > - * but not garbage-collected. The object is unhashed after the > - * final nfsd_file_put(). > + * The nfsd_file object returned by this API is reference-counted > + * and garbage-collected. The object is retained for a few > + * seconds after the final nfsd_file_put() in case the caller > + * wants to re-use it. > =C2=A0 * > =C2=A0 * Return values: > =C2=A0 *=C2=A0=C2=A0 %nfs_ok - @pnf points to an nfsd_file with its refer= ence > @@ -1214,7 +1215,7 @@ nfsd_file_acquire_local(struct net *net, struct svc= _cred *cred, > =C2=A0 unsigned int may_flags, struct nfsd_file **pnf) > =C2=A0{ > =C2=A0 return nfsd_file_do_acquire(NULL, net, cred, nfs_vers, client, > - =C2=A0=C2=A0=C2=A0 fhp, may_flags, NULL, pnf, false); > + =C2=A0=C2=A0=C2=A0 fhp, may_flags, NULL, pnf, true); > =C2=A0} > =C2=A0 > =C2=A0/** I'd just squash this into patch #6. --=20 Jeff Layton