From: Vivek Kumar <quic_vivekuma@quicinc.com> To: <corbet@lwn.net>, <catalin.marinas@arm.com>, <will@kernel.org>, <tglx@linutronix.de>, <maz@kernel.org>, <axboe@kernel.dk>, <rafael@kernel.org>, <akpm@linux-foundation.org>, <linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-block@vger.kernel.org>, <linux-pm@vger.kernel.org>, <linux-mm@kvack.org> Cc: <len.brown@intel.com>, <pavel@ucw.cz>, <paulmck@kernel.org>, <bp@suse.de>, <keescook@chromium.org>, <songmuchun@bytedance.com>, <rdunlap@infradead.org>, <damien.lemoal@opensource.wdc.com>, <pasha.tatashin@soleen.com>, <tabba@google.com>, <ardb@kernel.org>, <tsoni@quicinc.com>, <quic_psodagud@quicinc.com>, <quic_svaddagi@quicinc.com>, Vivek Kumar <quic_vivekuma@quicinc.com>, Prasanna Kumar <quic_kprasan@quicinc.com> Subject: [RFC 3/6] block: gendisk: Add a new genhd capability flag Date: Wed, 18 May 2022 13:18:38 +0530 [thread overview] Message-ID: <1652860121-24092-4-git-send-email-quic_vivekuma@quicinc.com> (raw) In-Reply-To: <1652860121-24092-1-git-send-email-quic_vivekuma@quicinc.com> Add a new genhd capability flag to serialize offsets for swap partition. This flag is enabled for the gendisk of the block device which will be used for saving the snapshot of the hibernation image, based on a kernel parameter "noswap_randomize". Serializing offset in swap partition helps in improving hibernation resume time from bootloader. Signed-off-by: Vivek Kumar <quic_vivekuma@quicinc.com> Signed-off-by: Prasanna Kumar <quic_kprasan@quicinc.com> --- include/linux/blkdev.h | 1 + kernel/power/swap.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 1b24c1f..be094e7 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -92,6 +92,7 @@ enum { GENHD_FL_REMOVABLE = 1 << 0, GENHD_FL_HIDDEN = 1 << 1, GENHD_FL_NO_PART = 1 << 2, + GENHD_FL_NO_RANDOMIZE = 1 << 3, }; enum { diff --git a/kernel/power/swap.c b/kernel/power/swap.c index 8d5c811..0a40eda 100644 --- a/kernel/power/swap.c +++ b/kernel/power/swap.c @@ -1526,6 +1526,9 @@ int swsusp_check(void) FMODE_READ | FMODE_EXCL, &holder); if (!IS_ERR(hib_resume_bdev)) { set_blocksize(hib_resume_bdev, PAGE_SIZE); + if (noswap_randomize) + hib_resume_bdev->bd_disk->flags |= + GENHD_FL_NO_RANDOMIZE; clear_page(swsusp_header); error = hib_submit_io(REQ_OP_READ, 0, swsusp_resume_block, -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: Vivek Kumar <quic_vivekuma@quicinc.com> To: <corbet@lwn.net>, <catalin.marinas@arm.com>, <will@kernel.org>, <tglx@linutronix.de>, <maz@kernel.org>, <axboe@kernel.dk>, <rafael@kernel.org>, <akpm@linux-foundation.org>, <linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-block@vger.kernel.org>, <linux-pm@vger.kernel.org>, <linux-mm@kvack.org> Cc: <len.brown@intel.com>, <pavel@ucw.cz>, <paulmck@kernel.org>, <bp@suse.de>, <keescook@chromium.org>, <songmuchun@bytedance.com>, <rdunlap@infradead.org>, <damien.lemoal@opensource.wdc.com>, <pasha.tatashin@soleen.com>, <tabba@google.com>, <ardb@kernel.org>, <tsoni@quicinc.com>, <quic_psodagud@quicinc.com>, <quic_svaddagi@quicinc.com>, Vivek Kumar <quic_vivekuma@quicinc.com>, Prasanna Kumar <quic_kprasan@quicinc.com> Subject: [RFC 3/6] block: gendisk: Add a new genhd capability flag Date: Wed, 18 May 2022 13:18:38 +0530 [thread overview] Message-ID: <1652860121-24092-4-git-send-email-quic_vivekuma@quicinc.com> (raw) In-Reply-To: <1652860121-24092-1-git-send-email-quic_vivekuma@quicinc.com> Add a new genhd capability flag to serialize offsets for swap partition. This flag is enabled for the gendisk of the block device which will be used for saving the snapshot of the hibernation image, based on a kernel parameter "noswap_randomize". Serializing offset in swap partition helps in improving hibernation resume time from bootloader. Signed-off-by: Vivek Kumar <quic_vivekuma@quicinc.com> Signed-off-by: Prasanna Kumar <quic_kprasan@quicinc.com> --- include/linux/blkdev.h | 1 + kernel/power/swap.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 1b24c1f..be094e7 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -92,6 +92,7 @@ enum { GENHD_FL_REMOVABLE = 1 << 0, GENHD_FL_HIDDEN = 1 << 1, GENHD_FL_NO_PART = 1 << 2, + GENHD_FL_NO_RANDOMIZE = 1 << 3, }; enum { diff --git a/kernel/power/swap.c b/kernel/power/swap.c index 8d5c811..0a40eda 100644 --- a/kernel/power/swap.c +++ b/kernel/power/swap.c @@ -1526,6 +1526,9 @@ int swsusp_check(void) FMODE_READ | FMODE_EXCL, &holder); if (!IS_ERR(hib_resume_bdev)) { set_blocksize(hib_resume_bdev, PAGE_SIZE); + if (noswap_randomize) + hib_resume_bdev->bd_disk->flags |= + GENHD_FL_NO_RANDOMIZE; clear_page(swsusp_header); error = hib_submit_io(REQ_OP_READ, 0, swsusp_resume_block, -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-05-18 7:49 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-05-18 7:48 [RFC 0/6] Bootloader based hibernation Vivek Kumar 2022-05-18 7:48 ` Vivek Kumar 2022-05-18 7:48 ` [RFC 1/6] arm64: hibernate: Introduce new entry point to kernel Vivek Kumar 2022-05-18 7:48 ` Vivek Kumar 2022-05-19 15:27 ` Marc Zyngier 2022-05-19 15:27 ` Marc Zyngier 2022-05-18 7:48 ` [RFC 2/6] PM: Hibernate: Add option to disable disk offset randomization Vivek Kumar 2022-05-18 7:48 ` Vivek Kumar 2022-05-18 12:19 ` Andrew Lunn 2022-05-18 12:19 ` Andrew Lunn 2022-05-18 13:00 ` Christoph Hellwig 2022-05-18 13:00 ` Christoph Hellwig 2022-05-23 20:49 ` Randy Dunlap 2022-05-23 20:49 ` Randy Dunlap 2022-05-18 7:48 ` Vivek Kumar [this message] 2022-05-18 7:48 ` [RFC 3/6] block: gendisk: Add a new genhd capability flag Vivek Kumar 2022-05-18 8:08 ` Christoph Hellwig 2022-05-18 8:08 ` Christoph Hellwig 2022-05-18 7:48 ` [RFC 4/6] mm: swap: Add randomization check for swapon/off calls Vivek Kumar 2022-05-18 7:48 ` Vivek Kumar 2022-05-18 12:27 ` Andrew Lunn 2022-05-18 12:27 ` Andrew Lunn 2022-05-18 7:48 ` [RFC 5/6] Hibernate: Add check for pte_valid in saveable page Vivek Kumar 2022-05-18 7:48 ` Vivek Kumar 2022-05-18 13:09 ` Christoph Hellwig 2022-05-18 13:09 ` Christoph Hellwig 2022-05-18 7:48 ` [RFC 6/6] irqchip/gic-v3: Re-init GIC hardware upon hibernation restore Vivek Kumar 2022-05-18 7:48 ` Vivek Kumar 2022-05-19 7:59 ` Marc Zyngier 2022-05-19 7:59 ` Marc Zyngier 2022-05-18 16:55 ` [RFC 0/6] Bootloader based hibernation Pasha Tatashin 2022-05-18 16:55 ` Pasha Tatashin 2022-05-20 16:43 ` Mark Rutland 2022-05-20 16:43 ` Mark Rutland
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