* [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail @ 2022-06-08 13:48 Fengnan Chang 2022-10-14 8:46 ` fengnan chang 2022-11-02 2:05 ` Eric Biggers 0 siblings, 2 replies; 9+ messages in thread From: Fengnan Chang @ 2022-06-08 13:48 UTC (permalink / raw) To: jaegeuk, chao; +Cc: linux-f2fs-devel When decompressed failed, f2fs_prepare_compress_overwrite will enter endless loop, may casue hungtask. [ 14.088665] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 [ 14.089851] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 Signed-off-by: Fengnan Chang <fengnanchang@gmail.com> --- fs/f2fs/compress.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index 24824cd96f36..1764e3859262 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -1060,7 +1060,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, sector_t last_block_in_bio; unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; pgoff_t start_idx = start_idx_of_cluster(cc); - int i, ret; + int i, ret, retry_count = 3; retry: ret = f2fs_is_compressed_cluster(cc->inode, start_idx); @@ -1120,7 +1120,12 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, f2fs_put_rpages(cc); f2fs_unlock_rpages(cc, i + 1); f2fs_destroy_compress_ctx(cc, true); - goto retry; + retry_count--; + if (PageError(page) && !retry_count) { + ret = -EIO; + goto out; + } else + goto retry; } } @@ -1657,10 +1662,16 @@ static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed) if (!rpage) continue; - /* PG_error was set if verity failed. */ - if (failed || PageError(rpage)) { + if (failed) { + /* decompress page failed */ + ClearPageUptodate(rpage); + SetPageError(rpage); + } else if (PageError(rpage)) { + /* + * PG_error was set if verity failed. + * will re-read again later. + */ ClearPageUptodate(rpage); - /* will re-read again later */ ClearPageError(rpage); } else { SetPageUptodate(rpage); -- 2.25.1 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel ^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail 2022-06-08 13:48 [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail Fengnan Chang @ 2022-10-14 8:46 ` fengnan chang 2022-11-01 9:41 ` fengnan chang 2022-11-02 2:05 ` Eric Biggers 1 sibling, 1 reply; 9+ messages in thread From: fengnan chang @ 2022-10-14 8:46 UTC (permalink / raw) To: Jaegeuk Kim, Chao Yu; +Cc: linux-f2fs-devel ping, it seems this had been forgotten. > 2022年6月8日 21:48，Fengnan Chang <fengnanchang@gmail.com> 写道： > > When decompressed failed, f2fs_prepare_compress_overwrite will enter > endless loop, may casue hungtask. > > [ 14.088665] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 > [ 14.089851] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 > > Signed-off-by: Fengnan Chang <fengnanchang@gmail.com> > --- > fs/f2fs/compress.c | 21 ++++++++++++++++----- > 1 file changed, 16 insertions(+), 5 deletions(-) > > diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c > index 24824cd96f36..1764e3859262 100644 > --- a/fs/f2fs/compress.c > +++ b/fs/f2fs/compress.c > @@ -1060,7 +1060,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, > sector_t last_block_in_bio; > unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; > pgoff_t start_idx = start_idx_of_cluster(cc); > - int i, ret; > + int i, ret, retry_count = 3; > > retry: > ret = f2fs_is_compressed_cluster(cc->inode, start_idx); > @@ -1120,7 +1120,12 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, > f2fs_put_rpages(cc); > f2fs_unlock_rpages(cc, i + 1); > f2fs_destroy_compress_ctx(cc, true); > - goto retry; > + retry_count--; > + if (PageError(page) && !retry_count) { > + ret = -EIO; > + goto out; > + } else > + goto retry; > } > } > > @@ -1657,10 +1662,16 @@ static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed) > if (!rpage) > continue; > > - /* PG_error was set if verity failed. */ > - if (failed || PageError(rpage)) { > + if (failed) { > + /* decompress page failed */ > + ClearPageUptodate(rpage); > + SetPageError(rpage); > + } else if (PageError(rpage)) { > + /* > + * PG_error was set if verity failed. > + * will re-read again later. > + */ > ClearPageUptodate(rpage); > - /* will re-read again later */ > ClearPageError(rpage); > } else { > SetPageUptodate(rpage); > -- > 2.25.1 > _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail 2022-10-14 8:46 ` fengnan chang @ 2022-11-01 9:41 ` fengnan chang 2022-11-01 15:06 ` Chao Yu 0 siblings, 1 reply; 9+ messages in thread From: fengnan chang @ 2022-11-01 9:41 UTC (permalink / raw) To: Jaegeuk Kim, Chao Yu; +Cc: linux-f2fs-devel friendly ping... fengnan chang <fengnanchang@gmail.com> 于2022年10月14日周五 16:46写道： > > ping, it seems this had been forgotten. > > > 2022年6月8日 21:48，Fengnan Chang <fengnanchang@gmail.com> 写道： > > > > When decompressed failed, f2fs_prepare_compress_overwrite will enter > > endless loop, may casue hungtask. > > > > [ 14.088665] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 > > [ 14.089851] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 > > > > Signed-off-by: Fengnan Chang <fengnanchang@gmail.com> > > --- > > fs/f2fs/compress.c | 21 ++++++++++++++++----- > > 1 file changed, 16 insertions(+), 5 deletions(-) > > > > diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c > > index 24824cd96f36..1764e3859262 100644 > > --- a/fs/f2fs/compress.c > > +++ b/fs/f2fs/compress.c > > @@ -1060,7 +1060,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, > > sector_t last_block_in_bio; > > unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; > > pgoff_t start_idx = start_idx_of_cluster(cc); > > - int i, ret; > > + int i, ret, retry_count = 3; > > > > retry: > > ret = f2fs_is_compressed_cluster(cc->inode, start_idx); > > @@ -1120,7 +1120,12 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, > > f2fs_put_rpages(cc); > > f2fs_unlock_rpages(cc, i + 1); > > f2fs_destroy_compress_ctx(cc, true); > > - goto retry; > > + retry_count--; > > + if (PageError(page) && !retry_count) { > > + ret = -EIO; > > + goto out; > > + } else > > + goto retry; > > } > > } > > > > @@ -1657,10 +1662,16 @@ static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed) > > if (!rpage) > > continue; > > > > - /* PG_error was set if verity failed. */ > > - if (failed || PageError(rpage)) { > > + if (failed) { > > + /* decompress page failed */ > > + ClearPageUptodate(rpage); > > + SetPageError(rpage); > > + } else if (PageError(rpage)) { > > + /* > > + * PG_error was set if verity failed. > > + * will re-read again later. > > + */ > > ClearPageUptodate(rpage); > > - /* will re-read again later */ > > ClearPageError(rpage); > > } else { > > SetPageUptodate(rpage); > > -- > > 2.25.1 > > > _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail 2022-11-01 9:41 ` fengnan chang @ 2022-11-01 15:06 ` Chao Yu 0 siblings, 0 replies; 9+ messages in thread From: Chao Yu @ 2022-11-01 15:06 UTC (permalink / raw) To: fengnan chang, Jaegeuk Kim; +Cc: linux-f2fs-devel Hi Fengnan, Sorry for the delay. I guess we can merge this patch, but let me check whether there is another solution, since mm guys want to remove PG_error usage to save one bit slot in page.flags. On 2022/11/1 17:41, fengnan chang wrote: > friendly ping... > > fengnan chang <fengnanchang@gmail.com> 于2022年10月14日周五 16:46写道： >> >> ping, it seems this had been forgotten. >> >>> 2022年6月8日 21:48，Fengnan Chang <fengnanchang@gmail.com> 写道： >>> >>> When decompressed failed, f2fs_prepare_compress_overwrite will enter >>> endless loop, may casue hungtask. >>> >>> [ 14.088665] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 >>> [ 14.089851] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 >>> >>> Signed-off-by: Fengnan Chang <fengnanchang@gmail.com> >>> --- >>> fs/f2fs/compress.c | 21 ++++++++++++++++----- >>> 1 file changed, 16 insertions(+), 5 deletions(-) >>> >>> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c >>> index 24824cd96f36..1764e3859262 100644 >>> --- a/fs/f2fs/compress.c >>> +++ b/fs/f2fs/compress.c >>> @@ -1060,7 +1060,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, >>> sector_t last_block_in_bio; >>> unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; >>> pgoff_t start_idx = start_idx_of_cluster(cc); >>> - int i, ret; >>> + int i, ret, retry_count = 3; Wrap magic number w/ macro? >>> >>> retry: >>> ret = f2fs_is_compressed_cluster(cc->inode, start_idx); >>> @@ -1120,7 +1120,12 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, >>> f2fs_put_rpages(cc); >>> f2fs_unlock_rpages(cc, i + 1); >>> f2fs_destroy_compress_ctx(cc, true); >>> - goto retry; >>> + retry_count--; >>> + if (PageError(page) && !retry_count) { >>> + ret = -EIO; >>> + goto out; >>> + } else >>> + goto retry; } else { goto retry; } >>> } >>> } >>> >>> @@ -1657,10 +1662,16 @@ static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed) >>> if (!rpage) >>> continue; >>> >>> - /* PG_error was set if verity failed. */ >>> - if (failed || PageError(rpage)) { >>> + if (failed) { >>> + /* decompress page failed */ >>> + ClearPageUptodate(rpage); >>> + SetPageError(rpage); >>> + } else if (PageError(rpage)) { >>> + /* >>> + * PG_error was set if verity failed. >>> + * will re-read again later. >>> + */ >>> ClearPageUptodate(rpage); >>> - /* will re-read again later */ >>> ClearPageError(rpage); >>> } else { >>> SetPageUptodate(rpage); >>> -- >>> 2.25.1 >>> >> _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail 2022-06-08 13:48 [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail Fengnan Chang 2022-10-14 8:46 ` fengnan chang @ 2022-11-02 2:05 ` Eric Biggers 2022-11-02 3:06 ` fengnan chang 1 sibling, 1 reply; 9+ messages in thread From: Eric Biggers @ 2022-11-02 2:05 UTC (permalink / raw) To: Fengnan Chang; +Cc: jaegeuk, linux-f2fs-devel On Wed, Jun 08, 2022 at 09:48:52PM +0800, Fengnan Chang wrote: > When decompressed failed, f2fs_prepare_compress_overwrite will enter > endless loop, may casue hungtask. > > [ 14.088665] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 > [ 14.089851] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 > > Signed-off-by: Fengnan Chang <fengnanchang@gmail.com> This commit message only explains the problem, not the solution. It should explain the solution too. Also, if it's fixing a bug, it needs 'Fixes' and 'Cc stable' tags. > diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c > index 24824cd96f36..1764e3859262 100644 > --- a/fs/f2fs/compress.c > +++ b/fs/f2fs/compress.c > @@ -1060,7 +1060,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, > sector_t last_block_in_bio; > unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; > pgoff_t start_idx = start_idx_of_cluster(cc); > - int i, ret; > + int i, ret, retry_count = 3; > > retry: > ret = f2fs_is_compressed_cluster(cc->inode, start_idx); > @@ -1120,7 +1120,12 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, > f2fs_put_rpages(cc); > f2fs_unlock_rpages(cc, i + 1); > f2fs_destroy_compress_ctx(cc, true); > - goto retry; > + retry_count--; > + if (PageError(page) && !retry_count) { > + ret = -EIO; > + goto out; > + } else What is the purpose of using PG_error here? - Eric _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail 2022-11-02 2:05 ` Eric Biggers @ 2022-11-02 3:06 ` fengnan chang 2022-11-02 3:18 ` Eric Biggers 0 siblings, 1 reply; 9+ messages in thread From: fengnan chang @ 2022-11-02 3:06 UTC (permalink / raw) To: Eric Biggers; +Cc: Jaegeuk Kim, linux-f2fs-devel > 2022年11月2日 10:05，Eric Biggers <ebiggers@kernel.org> 写道： > > On Wed, Jun 08, 2022 at 09:48:52PM +0800, Fengnan Chang wrote: >> When decompressed failed, f2fs_prepare_compress_overwrite will enter >> endless loop, may casue hungtask. >> >> [ 14.088665] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 >> [ 14.089851] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 >> >> Signed-off-by: Fengnan Chang <fengnanchang@gmail.com> > > This commit message only explains the problem, not the solution. It should > explain the solution too. > > Also, if it's fixing a bug, it needs 'Fixes' and 'Cc stable' tags. I’ll add more explanation and tags, thanks. > >> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c >> index 24824cd96f36..1764e3859262 100644 >> --- a/fs/f2fs/compress.c >> +++ b/fs/f2fs/compress.c >> @@ -1060,7 +1060,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, >> sector_t last_block_in_bio; >> unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; >> pgoff_t start_idx = start_idx_of_cluster(cc); >> - int i, ret; >> + int i, ret, retry_count = 3; >> >> retry: >> ret = f2fs_is_compressed_cluster(cc->inode, start_idx); >> @@ -1120,7 +1120,12 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, >> f2fs_put_rpages(cc); >> f2fs_unlock_rpages(cc, i + 1); >> f2fs_destroy_compress_ctx(cc, true); >> - goto retry; >> + retry_count--; >> + if (PageError(page) && !retry_count) { >> + ret = -EIO; >> + goto out; >> + } else > > What is the purpose of using PG_error here? In this version, we set PG_error when compressed failed, so check PG_error here. Maybe we can remove PG_error in later? > > - Eric _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail 2022-11-02 3:06 ` fengnan chang @ 2022-11-02 3:18 ` Eric Biggers 2022-11-02 3:43 ` fengnan chang 0 siblings, 1 reply; 9+ messages in thread From: Eric Biggers @ 2022-11-02 3:18 UTC (permalink / raw) To: fengnan chang; +Cc: Jaegeuk Kim, linux-f2fs-devel On Wed, Nov 02, 2022 at 11:06:17AM +0800, fengnan chang wrote: > > > > 2022年11月2日 10:05，Eric Biggers <ebiggers@kernel.org> 写道： > > > > On Wed, Jun 08, 2022 at 09:48:52PM +0800, Fengnan Chang wrote: > >> When decompressed failed, f2fs_prepare_compress_overwrite will enter > >> endless loop, may casue hungtask. > >> > >> [ 14.088665] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 > >> [ 14.089851] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 > >> > >> Signed-off-by: Fengnan Chang <fengnanchang@gmail.com> > > > > This commit message only explains the problem, not the solution. It should > > explain the solution too. > > > > Also, if it's fixing a bug, it needs 'Fixes' and 'Cc stable' tags. > > I’ll add more explanation and tags, thanks. > > > > >> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c > >> index 24824cd96f36..1764e3859262 100644 > >> --- a/fs/f2fs/compress.c > >> +++ b/fs/f2fs/compress.c > >> @@ -1060,7 +1060,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, > >> sector_t last_block_in_bio; > >> unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; > >> pgoff_t start_idx = start_idx_of_cluster(cc); > >> - int i, ret; > >> + int i, ret, retry_count = 3; > >> > >> retry: > >> ret = f2fs_is_compressed_cluster(cc->inode, start_idx); > >> @@ -1120,7 +1120,12 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, > >> f2fs_put_rpages(cc); > >> f2fs_unlock_rpages(cc, i + 1); > >> f2fs_destroy_compress_ctx(cc, true); > >> - goto retry; > >> + retry_count--; > >> + if (PageError(page) && !retry_count) { > >> + ret = -EIO; > >> + goto out; > >> + } else > > > > What is the purpose of using PG_error here? > > In this version, we set PG_error when compressed failed, so check PG_error here. > Maybe we can remove PG_error in later? > Read I/O errors can be detected via PG_uptodate not being set. There shouldn't be any need for PG_error here. - Eric _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail 2022-11-02 3:18 ` Eric Biggers @ 2022-11-02 3:43 ` fengnan chang 2022-11-02 3:48 ` Eric Biggers 0 siblings, 1 reply; 9+ messages in thread From: fengnan chang @ 2022-11-02 3:43 UTC (permalink / raw) To: Eric Biggers; +Cc: Jaegeuk Kim, linux-f2fs-devel Eric Biggers <ebiggers@kernel.org> 于2022年11月2日周三 11:18写道： > > On Wed, Nov 02, 2022 at 11:06:17AM +0800, fengnan chang wrote: > > > > > > > 2022年11月2日 10:05，Eric Biggers <ebiggers@kernel.org> 写道： > > > > > > On Wed, Jun 08, 2022 at 09:48:52PM +0800, Fengnan Chang wrote: > > >> When decompressed failed, f2fs_prepare_compress_overwrite will enter > > >> endless loop, may casue hungtask. > > >> > > >> [ 14.088665] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 > > >> [ 14.089851] F2FS-fs (nvme0n1): lz4 decompress failed, ret:-4155 > > >> > > >> Signed-off-by: Fengnan Chang <fengnanchang@gmail.com> > > > > > > This commit message only explains the problem, not the solution. It should > > > explain the solution too. > > > > > > Also, if it's fixing a bug, it needs 'Fixes' and 'Cc stable' tags. > > > > I’ll add more explanation and tags, thanks. > > > > > > > >> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c > > >> index 24824cd96f36..1764e3859262 100644 > > >> --- a/fs/f2fs/compress.c > > >> +++ b/fs/f2fs/compress.c > > >> @@ -1060,7 +1060,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, > > >> sector_t last_block_in_bio; > > >> unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; > > >> pgoff_t start_idx = start_idx_of_cluster(cc); > > >> - int i, ret; > > >> + int i, ret, retry_count = 3; > > >> > > >> retry: > > >> ret = f2fs_is_compressed_cluster(cc->inode, start_idx); > > >> @@ -1120,7 +1120,12 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, > > >> f2fs_put_rpages(cc); > > >> f2fs_unlock_rpages(cc, i + 1); > > >> f2fs_destroy_compress_ctx(cc, true); > > >> - goto retry; > > >> + retry_count--; > > >> + if (PageError(page) && !retry_count) { > > >> + ret = -EIO; > > >> + goto out; > > >> + } else > > > > > > What is the purpose of using PG_error here? > > > > In this version, we set PG_error when compressed failed, so check PG_error here. > > Maybe we can remove PG_error in later? > > > > Read I/O errors can be detected via PG_uptodate not being set. There shouldn't > be any need for PG_error here. Yeah, I get it now. Maybe we can remove PG_error in f2fs_verify_cluster too. diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index d315c2de136f..13c0bfe45804 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -1727,10 +1727,9 @@ static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed, continue; /* PG_error was set if verity failed. */ - if (failed || PageError(rpage)) { - ClearPageUptodate(rpage); + if (failed) { /* will re-read again later */ - ClearPageError(rpage); + ClearPageUptodate(rpage); } else { SetPageUptodate(rpage); } @@ -1745,13 +1744,14 @@ static void f2fs_verify_cluster(struct work_struct *work) struct decompress_io_ctx *dic = container_of(work, struct decompress_io_ctx, verity_work); int i; + bool failed = false; /* Verify the cluster's decompressed pages with fs-verity. */ for (i = 0; i < dic->cluster_size; i++) { struct page *rpage = dic->rpages[i]; if (rpage && !fsverity_verify_page(rpage)) - SetPageError(rpage); + failed = true; } __f2fs_decompress_end_io(dic, false, true); > > - Eric _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel ^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail 2022-11-02 3:43 ` fengnan chang @ 2022-11-02 3:48 ` Eric Biggers 0 siblings, 0 replies; 9+ messages in thread From: Eric Biggers @ 2022-11-02 3:48 UTC (permalink / raw) To: fengnan chang; +Cc: Jaegeuk Kim, linux-f2fs-devel On Wed, Nov 02, 2022 at 11:43:11AM +0800, fengnan chang wrote: > > > > What is the purpose of using PG_error here? > > > > > > In this version, we set PG_error when compressed failed, so check PG_error here. > > > Maybe we can remove PG_error in later? > > > > > > > Read I/O errors can be detected via PG_uptodate not being set. There shouldn't > > be any need for PG_error here. > > Yeah, I get it now. Maybe we can remove PG_error in f2fs_verify_cluster too. > > diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c > index d315c2de136f..13c0bfe45804 100644 > --- a/fs/f2fs/compress.c > +++ b/fs/f2fs/compress.c > @@ -1727,10 +1727,9 @@ static void __f2fs_decompress_end_io(struct > decompress_io_ctx *dic, bool failed, > continue; > > /* PG_error was set if verity failed. */ > - if (failed || PageError(rpage)) { > - ClearPageUptodate(rpage); > + if (failed) { > /* will re-read again later */ > - ClearPageError(rpage); > + ClearPageUptodate(rpage); > } else { > SetPageUptodate(rpage); > } > @@ -1745,13 +1744,14 @@ static void f2fs_verify_cluster(struct > work_struct *work) > struct decompress_io_ctx *dic = > container_of(work, struct decompress_io_ctx, verity_work); > int i; > + bool failed = false; > > /* Verify the cluster's decompressed pages with fs-verity. */ > for (i = 0; i < dic->cluster_size; i++) { > struct page *rpage = dic->rpages[i]; > > if (rpage && !fsverity_verify_page(rpage)) > - SetPageError(rpage); > + failed = true; > } No, PG_error is still used to notify f2fs_finish_read_bio() and __f2fs_decompress_end_io() of verity errors. My patch https://lore.kernel.org/r/20221028175807.55495-1-ebiggers@kernel.org changes that. Please leave that to my patch. For your patch, please just don't add a new use of PG_error, as it doesn't seem to be necessary. - Eric _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2022-11-02 3:48 UTC | newest] Thread overview: 9+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2022-06-08 13:48 [f2fs-dev] [PATCH v2] f2fs: fix hungtask when decompressed fail Fengnan Chang 2022-10-14 8:46 ` fengnan chang 2022-11-01 9:41 ` fengnan chang 2022-11-01 15:06 ` Chao Yu 2022-11-02 2:05 ` Eric Biggers 2022-11-02 3:06 ` fengnan chang 2022-11-02 3:18 ` Eric Biggers 2022-11-02 3:43 ` fengnan chang 2022-11-02 3:48 ` Eric Biggers
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