From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 C04CD3A0E8D; Sat, 17 Oct 2026 16:26:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792254417; cv=none; b=Pj6RoIORxWhN/1tYeVRqYJP9xM0XFIrT3n+Ud0LF4rGJ92J3io7+bY5HB4Vq7XLLhlo4gqcMw3DFcGDm4Jh7s+aKYJA3jurTZGsn4pTh1yDZZIu/EcBNxyOUgzxo/Mn0xN9F2sHRBbzesvxMTE4gHHBMsBpvNt+AnMGumoOIT08= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792254417; c=relaxed/simple; bh=W6ie0G7IIrHiIAZniisojjf4mdKU91gGagEGn9/Iaog=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DT+xR9g2q7lhS55Kkr6ZdNPztUQ2ixZhSSPOQskgbtlSBVP/nukZJ9d81gmfPVWqKTJGwd8F/c7VUPDLApacvLcpPDUQ/fDiZU0NUhVeyPA+0ah7uqM5cnG0vZmn9sYyLO00gLyL73HV0rnpqeBAVlYNEr7gruuuX/EmbN0Bzek= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=o0Y8+NBs; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="o0Y8+NBs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27BCD1F000C5; Sat, 17 Oct 2026 16:26:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792254415; bh=BEWmxWaM4BmVeFJRXzLgbYvGjG8DsBGHpeR6ylk2DOI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=o0Y8+NBsjkWc0Ebtu4fJ3GwsBtAbdHWBpDBRqgU3FITJdVTKtgZvVktiHKEXUiP7O G7qVoOiME4rdK3KdzObBRX7HZ3fNZjx3l6qhXcD8okI6ofm6IxU+sNnBitjdXqCsL2 5D47kZlNO/rruGiZCUDbCzJHFnI0Er4017sT5F/A= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Linus Torvalds , David Howells , Jeff Layton , netfs@lists.linux.dev, linux-fsdevel@vger.kernel.org, Christian Brauner , Sasha Levin Subject: [PATCH 6.12 440/869] netfs: Drop the was_async arg from netfs_read_subreq_terminated() Date: Sat, 17 Oct 2026 17:54:41 +0200 Message-ID: <20261017160048.424335743@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261017160036.979869304@linuxfoundation.org> References: <20261017160036.979869304@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: David Howells [ Upstream commit 31fc366aa7aa911ebc0744e99c82caee4e97315a ] Drop the was_async argument from netfs_read_subreq_terminated(). Almost every caller is either in process context and passes false. Some filesystems delegate the call to a workqueue to avoid doing the work in their network message queue parsing thread. The only exception is netfs_cache_read_terminated() which handles completion in the cache - which is usually a callback from the backing filesystem in softirq context, though it can be from process context if an error occurred. In this case, delegate to a workqueue. Suggested-by: Linus Torvalds Link: https://lore.kernel.org/r/CAHk-=wiVC5Cgyz6QKXFu6fTaA6h4CjexDR-OV9kL6Vo5x9v8=A@mail.gmail.com/ Signed-off-by: David Howells Link: https://lore.kernel.org/r/20241216204124.3752367-10-dhowells@redhat.com cc: Jeff Layton cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org Signed-off-by: Christian Brauner Stable-dep-of: dbd6f56d975b ("netfs: Fix netfs_create_write_req() to handle async cache object creation") Signed-off-by: Sasha Levin --- fs/9p/vfs_addr.c | 2 +- fs/afs/file.c | 6 ++--- fs/afs/fsclient.c | 2 +- fs/afs/yfsclient.c | 2 +- fs/ceph/addr.c | 6 ++--- fs/netfs/buffered_read.c | 6 ++--- fs/netfs/direct_read.c | 2 +- fs/netfs/internal.h | 3 +-- fs/netfs/objects.c | 2 +- fs/netfs/read_collect.c | 53 +++++++++------------------------------- fs/netfs/read_retry.c | 2 +- fs/nfs/fscache.c | 2 +- fs/nfs/fscache.h | 2 +- fs/smb/client/file.c | 2 +- include/linux/netfs.h | 4 +-- 15 files changed, 33 insertions(+), 63 deletions(-) diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 5bf1e5caaa623..b346d4f3eb9db 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -96,7 +96,7 @@ static void v9fs_issue_read(struct netfs_io_subrequest *subreq) subreq->transferred += total; subreq->error = err; - netfs_read_subreq_terminated(subreq, false); + netfs_read_subreq_terminated(subreq); } /** diff --git a/fs/afs/file.c b/fs/afs/file.c index 56248a078bcaa..f717168da4abb 100644 --- a/fs/afs/file.c +++ b/fs/afs/file.c @@ -247,7 +247,7 @@ static void afs_fetch_data_notify(struct afs_operation *op) if (req->pos + req->actual_len >= req->file_size) __set_bit(NETFS_SREQ_HIT_EOF, &subreq->flags); subreq->error = error; - netfs_read_subreq_terminated(subreq, false); + netfs_read_subreq_terminated(subreq); req->subreq = NULL; } else if (req->done) { req->done(req); @@ -304,7 +304,7 @@ int afs_fetch_data(struct afs_vnode *vnode, struct afs_read *req) if (IS_ERR(op)) { if (req->subreq) { req->subreq->error = PTR_ERR(op); - netfs_read_subreq_terminated(req->subreq, false); + netfs_read_subreq_terminated(req->subreq); } return PTR_ERR(op); } @@ -325,7 +325,7 @@ static void afs_read_worker(struct work_struct *work) fsreq = afs_alloc_read(GFP_NOFS); if (!fsreq) { subreq->error = -ENOMEM; - return netfs_read_subreq_terminated(subreq, false); + return netfs_read_subreq_terminated(subreq); } fsreq->subreq = subreq; diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c index 1f8a7878e9d96..b171078773f09 100644 --- a/fs/afs/fsclient.c +++ b/fs/afs/fsclient.c @@ -352,7 +352,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call) ret = afs_extract_data(call, true); if (req->subreq) { req->subreq->transferred += count_before - call->iov_len; - netfs_read_subreq_progress(req->subreq, false); + netfs_read_subreq_progress(req->subreq); } if (ret < 0) return ret; diff --git a/fs/afs/yfsclient.c b/fs/afs/yfsclient.c index 362845f9aaaef..667b78b485438 100644 --- a/fs/afs/yfsclient.c +++ b/fs/afs/yfsclient.c @@ -398,7 +398,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call) ret = afs_extract_data(call, true); if (req->subreq) { req->subreq->transferred += count_before - call->iov_len; - netfs_read_subreq_progress(req->subreq, false); + netfs_read_subreq_progress(req->subreq); } if (ret < 0) return ret; diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 355555e313102..13508fee6293b 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -255,7 +255,7 @@ static void finish_netfs_read(struct ceph_osd_request *req) } subreq->error = err; trace_netfs_sreq(subreq, netfs_sreq_trace_io_progress); - netfs_read_subreq_terminated(subreq, false); + netfs_read_subreq_terminated(subreq); iput(req->r_inode); ceph_dec_osd_stopping_blocker(fsc->mdsc); } @@ -317,7 +317,7 @@ static bool ceph_netfs_issue_op_inline(struct netfs_io_subrequest *subreq) out: subreq->error = err; trace_netfs_sreq(subreq, netfs_sreq_trace_io_progress); - netfs_read_subreq_terminated(subreq, false); + netfs_read_subreq_terminated(subreq); return true; } @@ -440,7 +440,7 @@ static void ceph_netfs_issue_read(struct netfs_io_subrequest *subreq) ceph_osdc_put_request(req); if (err) { subreq->error = err; - netfs_read_subreq_terminated(subreq, false); + netfs_read_subreq_terminated(subreq); } doutc(cl, "%llx.%llx result %d\n", ceph_vinop(inode), err); } diff --git a/fs/netfs/buffered_read.c b/fs/netfs/buffered_read.c index 03bb1bbbbaa2a..1228cabbfde3a 100644 --- a/fs/netfs/buffered_read.c +++ b/fs/netfs/buffered_read.c @@ -154,7 +154,7 @@ static void netfs_cache_read_terminated(void *priv, ssize_t transferred_or_error } else { subreq->error = transferred_or_error; } - netfs_read_subreq_terminated(subreq, was_async); + schedule_work(&subreq->work); } /* @@ -255,7 +255,7 @@ static void netfs_read_to_pagecache(struct netfs_io_request *rreq) goto prep_iter_failed; __set_bit(NETFS_SREQ_CLEAR_TAIL, &subreq->flags); subreq->error = 0; - netfs_read_subreq_terminated(subreq, false); + netfs_read_subreq_terminated(subreq); goto done; } @@ -287,7 +287,7 @@ static void netfs_read_to_pagecache(struct netfs_io_request *rreq) } while (size > 0); if (atomic_dec_and_test(&rreq->nr_outstanding)) - netfs_rreq_terminated(rreq, false); + netfs_rreq_terminated(rreq); /* Defer error return as we may need to wait for outstanding I/O. */ cmpxchg(&rreq->error, 0, ret); diff --git a/fs/netfs/direct_read.c b/fs/netfs/direct_read.c index 80ba521107dce..2c79db1434324 100644 --- a/fs/netfs/direct_read.c +++ b/fs/netfs/direct_read.c @@ -100,7 +100,7 @@ static int netfs_dispatch_unbuffered_reads(struct netfs_io_request *rreq) } while (size > 0); if (atomic_dec_and_test(&rreq->nr_outstanding)) - netfs_rreq_terminated(rreq, false); + netfs_rreq_terminated(rreq); return ret; } diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h index 102bc07f3f55b..7256277edacb8 100644 --- a/fs/netfs/internal.h +++ b/fs/netfs/internal.h @@ -86,8 +86,7 @@ static inline void netfs_see_request(struct netfs_io_request *rreq, /* * read_collect.c */ -void netfs_read_termination_worker(struct work_struct *work); -void netfs_rreq_terminated(struct netfs_io_request *rreq, bool was_async); +void netfs_rreq_terminated(struct netfs_io_request *rreq); /* * read_pgpriv2.c diff --git a/fs/netfs/objects.c b/fs/netfs/objects.c index f10fd56efa177..8c98b70eb3a4f 100644 --- a/fs/netfs/objects.c +++ b/fs/netfs/objects.c @@ -56,7 +56,7 @@ struct netfs_io_request *netfs_alloc_request(struct address_space *mapping, origin == NETFS_READ_GAPS || origin == NETFS_READ_FOR_WRITE || origin == NETFS_DIO_READ) - INIT_WORK(&rreq->work, netfs_read_termination_worker); + INIT_WORK(&rreq->work, NULL); else INIT_WORK(&rreq->work, netfs_write_collection_worker); diff --git a/fs/netfs/read_collect.c b/fs/netfs/read_collect.c index c420c231f8d05..63f9ddf4435fd 100644 --- a/fs/netfs/read_collect.c +++ b/fs/netfs/read_collect.c @@ -87,7 +87,7 @@ static void netfs_unlock_read_folio(struct netfs_io_subrequest *subreq, * Unlock any folios that are now completely read. Returns true if the * subrequest is removed from the list. */ -static bool netfs_consume_read_data(struct netfs_io_subrequest *subreq, bool was_async) +static bool netfs_consume_read_data(struct netfs_io_subrequest *subreq) { struct netfs_io_subrequest *prev, *next; struct netfs_io_request *rreq = subreq->rreq; @@ -230,8 +230,7 @@ static bool netfs_consume_read_data(struct netfs_io_subrequest *subreq, bool was subreq->curr_folioq_slot = slot; if (folioq && folioq_folio(folioq, slot)) subreq->curr_folio_order = folioq->orders[slot]; - if (!was_async) - cond_resched(); + cond_resched(); goto next_folio; } @@ -369,7 +368,7 @@ static void netfs_rreq_assess_dio(struct netfs_io_request *rreq) * Note that we're in normal kernel thread context at this point, possibly * running on a workqueue. */ -static void netfs_rreq_assess(struct netfs_io_request *rreq) +void netfs_rreq_terminated(struct netfs_io_request *rreq) { trace_netfs_rreq(rreq, netfs_rreq_trace_assess); @@ -395,56 +394,29 @@ static void netfs_rreq_assess(struct netfs_io_request *rreq) netfs_pgpriv2_write_to_the_cache(rreq); } -void netfs_read_termination_worker(struct work_struct *work) -{ - struct netfs_io_request *rreq = - container_of(work, struct netfs_io_request, work); - netfs_see_request(rreq, netfs_rreq_trace_see_work); - netfs_rreq_assess(rreq); - netfs_put_request(rreq, false, netfs_rreq_trace_put_work_complete); -} - -/* - * Handle the completion of all outstanding I/O operations on a read request. - * We inherit a ref from the caller. - */ -void netfs_rreq_terminated(struct netfs_io_request *rreq, bool was_async) -{ - if (!was_async) - return netfs_rreq_assess(rreq); - if (!work_pending(&rreq->work)) { - netfs_get_request(rreq, netfs_rreq_trace_get_work); - if (!queue_work(system_unbound_wq, &rreq->work)) - netfs_put_request(rreq, was_async, netfs_rreq_trace_put_work_nq); - } -} - /** * netfs_read_subreq_progress - Note progress of a read operation. * @subreq: The read request that has terminated. - * @was_async: True if we're in an asynchronous context. * * This tells the read side of netfs lib that a contributory I/O operation has * made some progress and that it may be possible to unlock some folios. * * Before calling, the filesystem should update subreq->transferred to track * the amount of data copied into the output buffer. - * - * If @was_async is true, the caller might be running in softirq or interrupt - * context and we can't sleep. */ -void netfs_read_subreq_progress(struct netfs_io_subrequest *subreq, - bool was_async) +void netfs_read_subreq_progress(struct netfs_io_subrequest *subreq) { struct netfs_io_request *rreq = subreq->rreq; + might_sleep(); + trace_netfs_sreq(subreq, netfs_sreq_trace_progress); if (subreq->transferred > subreq->consumed && (rreq->origin == NETFS_READAHEAD || rreq->origin == NETFS_READPAGE || rreq->origin == NETFS_READ_FOR_WRITE)) { - netfs_consume_read_data(subreq, was_async); + netfs_consume_read_data(subreq); __clear_bit(NETFS_SREQ_NO_PROGRESS, &subreq->flags); } } @@ -453,7 +425,6 @@ EXPORT_SYMBOL(netfs_read_subreq_progress); /** * netfs_read_subreq_terminated - Note the termination of an I/O operation. * @subreq: The I/O request that has terminated. - * @was_async: True if we're in an asynchronous context. * * This tells the read helper that a contributory I/O operation has terminated, * one way or another, and that it should integrate the results. @@ -467,7 +438,7 @@ EXPORT_SYMBOL(netfs_read_subreq_progress); * Before calling, the filesystem should update subreq->transferred to track * the amount of data copied into the output buffer. */ -void netfs_read_subreq_terminated(struct netfs_io_subrequest *subreq, bool was_async) +void netfs_read_subreq_terminated(struct netfs_io_subrequest *subreq) { struct netfs_io_request *rreq = subreq->rreq; @@ -501,7 +472,7 @@ void netfs_read_subreq_terminated(struct netfs_io_subrequest *subreq, bool was_a (rreq->origin == NETFS_READAHEAD || rreq->origin == NETFS_READPAGE || rreq->origin == NETFS_READ_FOR_WRITE)) { - netfs_consume_read_data(subreq, was_async); + netfs_consume_read_data(subreq); __clear_bit(NETFS_SREQ_NO_PROGRESS, &subreq->flags); } rreq->transferred += subreq->transferred; @@ -543,9 +514,9 @@ void netfs_read_subreq_terminated(struct netfs_io_subrequest *subreq, bool was_a } if (atomic_dec_and_test(&rreq->nr_outstanding)) - netfs_rreq_terminated(rreq, was_async); + netfs_rreq_terminated(rreq); - netfs_put_subrequest(subreq, was_async, netfs_sreq_trace_put_terminated); + netfs_put_subrequest(subreq, false, netfs_sreq_trace_put_terminated); } EXPORT_SYMBOL(netfs_read_subreq_terminated); @@ -561,6 +532,6 @@ void netfs_read_subreq_termination_worker(struct work_struct *work) struct netfs_io_subrequest *subreq = container_of(work, struct netfs_io_subrequest, work); - netfs_read_subreq_terminated(subreq, false); + netfs_read_subreq_terminated(subreq); } EXPORT_SYMBOL(netfs_read_subreq_termination_worker); diff --git a/fs/netfs/read_retry.c b/fs/netfs/read_retry.c index 1c66c6e5c84b4..c195dded05527 100644 --- a/fs/netfs/read_retry.c +++ b/fs/netfs/read_retry.c @@ -233,7 +233,7 @@ void netfs_retry_reads(struct netfs_io_request *rreq) netfs_retry_read_subrequests(rreq); if (atomic_dec_and_test(&rreq->nr_outstanding)) - netfs_rreq_terminated(rreq, false); + netfs_rreq_terminated(rreq); } /* diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index be14d30608f6d..e278a1ad1ca3e 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -316,7 +316,7 @@ static void nfs_netfs_issue_read(struct netfs_io_subrequest *sreq) netfs = nfs_netfs_alloc(sreq); if (!netfs) { sreq->error = -ENOMEM; - return netfs_read_subreq_terminated(sreq, false); + return netfs_read_subreq_terminated(sreq); } pgio.pg_netfs = netfs; /* used in completion */ diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index 1d86f7cc71950..9d86868f49984 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -75,7 +75,7 @@ static inline void nfs_netfs_put(struct nfs_netfs_io_data *netfs) netfs->sreq->transferred = min_t(s64, netfs->sreq->len, atomic64_read(&netfs->transferred)); netfs->sreq->error = netfs->error; - netfs_read_subreq_terminated(netfs->sreq, false); + netfs_read_subreq_terminated(netfs->sreq); kfree(netfs); } static inline void nfs_netfs_inode_init(struct nfs_inode *nfsi) diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c index 0728858193bce..b6eea70554d71 100644 --- a/fs/smb/client/file.c +++ b/fs/smb/client/file.c @@ -231,7 +231,7 @@ static void cifs_issue_read(struct netfs_io_subrequest *subreq) failed: add_credits_and_wake_if(rdata->server, &rdata->credits, 0); subreq->error = rc; - netfs_read_subreq_terminated(subreq, false); + netfs_read_subreq_terminated(subreq); } /* diff --git a/include/linux/netfs.h b/include/linux/netfs.h index 73f782ce63695..ff208bbe6c5a6 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -430,8 +430,8 @@ bool netfs_release_folio(struct folio *folio, gfp_t gfp); vm_fault_t netfs_page_mkwrite(struct vm_fault *vmf, struct netfs_group *netfs_group); /* (Sub)request management API. */ -void netfs_read_subreq_progress(struct netfs_io_subrequest *subreq, bool was_async); -void netfs_read_subreq_terminated(struct netfs_io_subrequest *subreq, bool was_async); +void netfs_read_subreq_progress(struct netfs_io_subrequest *subreq); +void netfs_read_subreq_terminated(struct netfs_io_subrequest *subreq); void netfs_read_subreq_termination_worker(struct work_struct *work); void netfs_get_subrequest(struct netfs_io_subrequest *subreq, enum netfs_sreq_ref_trace what); -- 2.53.0