diff --git a/fs/netfs/buffered_read.c b/fs/netfs/buffered_read.c index c40e226053cc..a233412ba08f 100644 --- a/fs/netfs/buffered_read.c +++ b/fs/netfs/buffered_read.c @@ -233,6 +233,7 @@ static void netfs_read_to_pagecache(struct netfs_io_request *rreq) subreq->start = start; subreq->len = size; + subreq->rretry_times = 0; atomic_inc(&rreq->nr_outstanding); spin_lock_bh(&rreq->lock); diff --git a/fs/netfs/direct_read.c b/fs/netfs/direct_read.c index b1a66a6e6bc2..beb81e06d13b 100644 --- a/fs/netfs/direct_read.c +++ b/fs/netfs/direct_read.c @@ -66,6 +66,7 @@ static int netfs_dispatch_unbuffered_reads(struct netfs_io_request *rreq) subreq->source = NETFS_DOWNLOAD_FROM_SERVER; subreq->start = start; subreq->len = size; + subreq->rretry_times = 0; atomic_inc(&rreq->nr_outstanding); spin_lock_bh(&rreq->lock); diff --git a/fs/netfs/read_collect.c b/fs/netfs/read_collect.c index b18c65ba5580..b2c8d5df73f9 100644 --- a/fs/netfs/read_collect.c +++ b/fs/netfs/read_collect.c @@ -509,9 +509,15 @@ void netfs_read_subreq_terminated(struct netfs_io_subrequest *subreq, } else { trace_netfs_sreq(subreq, netfs_sreq_trace_short); if (subreq->transferred > subreq->consumed) { - __set_bit(NETFS_SREQ_NEED_RETRY, &subreq->flags); - __clear_bit(NETFS_SREQ_NO_PROGRESS, &subreq->flags); - set_bit(NETFS_RREQ_NEED_RETRY, &rreq->flags); + /* if we didn't read new data, abandon retry*/ + if (subreq->rretry_times && subreq->fresh_len) { + __set_bit(NETFS_SREQ_NEED_RETRY, &subreq->flags); + __clear_bit(NETFS_SREQ_NO_PROGRESS, &subreq->flags); + set_bit(NETFS_RREQ_NEED_RETRY, &rreq->flags); + } + printk("subreq: %p, 1async: %d, rreq: %p, rreq transferred: %lu, sub req transed: %lu, " + "sub req length: %lu, retry times: %d, subreq consume: %d, subreq list empty: %d, %s\n", + subreq, was_async, rreq, rreq->transferred, subreq->transferred, subreq->len, subreq->rretry_times, subreq->consumed, list_empty(&rreq->subrequests), __func__); } else if (!__test_and_set_bit(NETFS_SREQ_NO_PROGRESS, &subreq->flags)) { __set_bit(NETFS_SREQ_NEED_RETRY, &subreq->flags); set_bit(NETFS_RREQ_NEED_RETRY, &rreq->flags); diff --git a/fs/netfs/read_retry.c b/fs/netfs/read_retry.c index 0350592ea804..d549b54de6ec 100644 --- a/fs/netfs/read_retry.c +++ b/fs/netfs/read_retry.c @@ -23,6 +23,8 @@ static void netfs_reissue_read(struct netfs_io_request *rreq, atomic_inc(&rreq->nr_outstanding); __set_bit(NETFS_SREQ_IN_PROGRESS, &subreq->flags); netfs_get_subrequest(subreq, netfs_sreq_trace_get_resubmit); + printk("rq: %p, subrq: %p, len: %lu, consumed: %d, transfed: %lu, %s\n", + rreq, subreq, subreq->len, subreq->consumed, subreq->transferred, __func__); subreq->rreq->netfs_ops->issue_read(subreq); } @@ -52,10 +54,12 @@ static void netfs_retry_read_subrequests(struct netfs_io_request *rreq) !test_bit(NETFS_RREQ_COPY_TO_CACHE, &rreq->flags)) { struct netfs_io_subrequest *subreq; + printk("rrq: %p, %s\n", rreq, __func__); list_for_each_entry(subreq, &rreq->subrequests, rreq_link) { if (test_bit(NETFS_SREQ_FAILED, &subreq->flags)) break; if (__test_and_clear_bit(NETFS_SREQ_NEED_RETRY, &subreq->flags)) { + subreq->rretry_times++; netfs_reset_iter(subreq); netfs_reissue_read(rreq, subreq); } @@ -183,6 +187,7 @@ static void netfs_retry_read_subrequests(struct netfs_io_request *rreq) goto abandon; subreq->source = NETFS_DOWNLOAD_FROM_SERVER; subreq->start = start; + subreq->rretry_times = 0; /* We get two refs, but need just one. */ netfs_put_subrequest(subreq, false, netfs_sreq_trace_new); diff --git a/include/linux/netfs.h b/include/linux/netfs.h index 5eaceef41e6c..c0b1f058f09a 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -191,6 +191,8 @@ struct netfs_io_subrequest { unsigned char curr_folio_order; /* Order of folio */ struct folio_queue *curr_folioq; /* Queue segment in which current folio resides */ unsigned long flags; + size_t fresh_len; /* The length of the data just read */ + u8 rretry_times; /* The times of retry read */ #define NETFS_SREQ_COPY_TO_CACHE 0 /* Set if should copy the data to the cache */ #define NETFS_SREQ_CLEAR_TAIL 1 /* Set if the rest of the read should be cleared */ #define NETFS_SREQ_SEEK_DATA_READ 3 /* Set if ->read() should SEEK_DATA first */ diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 819c75233235..6e33a3dfec40 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -80,8 +80,13 @@ static void v9fs_issue_read(struct netfs_io_subrequest *subreq) if (pos + total >= i_size_read(rreq->inode)) __set_bit(NETFS_SREQ_HIT_EOF, &subreq->flags); - if (!err) + if (!err) { subreq->transferred += total; + subreq->fresh_len = total; + } else + subreq->fresh_len = 0; + + printk("subreq: %p, sub rq len: %lu, err: %d, total: %d, transfed: %d, %s\n", subreq, subreq->len, err, total, subreq->transferred, __func__); netfs_read_subreq_terminated(subreq, err, false); }